Chapter 4 — Physical Fitness

Definition and scope
Physical fitness refers to the capacity of the body to perform daily tasks, respond to stresses and engage in leisure or sporting activities without undue fatigue. It includes the efficiency of organs and systems (heart, lungs, muscles), as well as the ability to recover after effort. Fitness is not a single quality; it is a combination of many attributes that work together.

Different meanings for different aims
For general health, fitness means having enough endurance, strength and flexibility to live independently and resist disease. For sport, fitness is tailored to the demands of a particular activity — a long-distance runner needs exceptional aerobic fitness while a weightlifter needs high muscular strength. For safety in daily life, fitness implies being able to climb stairs, carry groceries and react quickly in emergencies.

Components and balance
Fitness is usually divided into health-related components (cardiovascular endurance, muscular strength, muscular endurance, flexibility and body composition) and skill-related components (speed, agility, power, balance, coordination and reaction time). A balanced programme addresses both sets so that a student develops broadly rather than specialising too early.

Why it matters for adolescents
During the teenage years, establishing good fitness habits supports growth, bone and muscle development, mental health and academic performance. Active students often have better concentration, mood and sleep. Early development of fitness also reduces the risk of chronic diseases later in life. For students who play sports, fitness increases performance and reduces injury risk.

How fitness is measured
Fitness can be measured by simple field tests suitable for schools: timed runs for endurance, sit-ups for muscular endurance, sit-and-reach for flexibility, and basic body composition measures like BMI. Assessments give baseline data for planning training and measuring progress. Tests should be repeated periodically to monitor improvement and adjust programmes.

Attitude and lifestyle
Fitness is shaped by regular activity, balanced nutrition, rest and positive attitudes. A student who values consistent practice, plans rest and follows healthy eating will see better results than someone relying on short bursts of effort. Fitness education emphasises sustainable habits rather than quick fixes.

Overview of health-related components
Health-related fitness comprises five major elements that directly affect wellbeing and day-to-day functioning: cardiovascular endurance, muscular strength, muscular endurance, flexibility, and body composition. Each part contributes to health, reduces disease risk and supports physical independence.

Cardiovascular endurance
This is the ability of the heart, lungs and circulatory system to supply oxygen and nutrients to working muscles during sustained activity. Good cardiovascular endurance enables a person to maintain moderate exercise for longer periods and recover efficiently. School-age training improves oxygen delivery systems and supports long-term heart health by increasing stroke volume and capillary efficiency.

Muscular strength
Muscular strength is the maximum force a muscle or group can exert in a single effort. Strength allows lifting, pushing and stabilising movements. During adolescence, building strength with appropriate resistance training under supervision improves posture, bone density and sport performance while reducing injury risk from weak stabiliser muscles.

Muscular endurance
Muscular endurance is the ability of muscles to perform repeated contractions or maintain tension over time. It supports prolonged activities such as running, swimming and repeated game actions. Core endurance, for example, helps maintain posture and decreases likelihood of lower back pain during heavy schoolbags or prolonged sitting.

Flexibility
Flexibility is the available range of motion around joints. Regular, controlled stretching and mobility work improve flexibility, which in turn allows efficient technique execution and reduces strain on muscles and tendons. Flexibility varies between individuals and joints; targeted routines can improve areas of tightness over weeks.

Body composition
Body composition describes the proportion of fat to lean tissue in the body. Healthy composition supports movement and lowers disease risk. Excess body fat is associated with metabolic and cardiovascular problems, while too little body fat can affect growth and hormone balance. Combining aerobic and resistance training with balanced nutrition helps achieve healthy composition.

Interdependence and programme design
The five components interact: strength training can improve body composition and support endurance, while improved flexibility can enhance strength application through better technique. A school fitness programme should assess each element, set priorities based on student needs, and include varied sessions such as aerobic workouts, resistance circuits and flexibility routines. Regular reassessment every 6–8 weeks helps track progress and adjust emphasis, ensuring balanced development and reducing risk of overuse injuries from repeated single-mode training.

Defining skill-related fitness
Skill-related fitness consists of attributes that improve athletic performance by enhancing movement efficiency, speed and the ability to respond to changing situations. While health-related fitness supports general wellbeing, skill-related fitness is more directly linked to sport and specific tasks. Key components include speed, agility, power, balance, coordination and reaction time.

Speed
Speed is the ability to move the body rapidly from one point to another. It depends on muscle fibre composition, technique, stride length and turnover. Sprint training, technique drills and resisted runs help build speed. For many sports, speed separates elite performers from others.

Agility
Agility is the capability to change direction and body position quickly while maintaining control. Agility is essential in sports like football, basketball and badminton. Training uses ladder drills, cone drills and sport-specific movement patterns that require sudden decelerations and accelerations.

Power
Power combines strength and speed — the ability to exert maximum force quickly. It is needed for jumping, throwing and explosive starts. Plyometric exercises (jumps, bounds) and explosive resistance training increase power when performed with proper technique and recovery.

Balance and coordination
Balance is maintaining the body's centre of gravity over its base of support, whether static or dynamic. Coordination is the smooth integration of body parts during movement. Activities like gymnastics, dance, and many ball sports require high levels of both. Balance training uses stability drills while coordination improves through repetition of complex movements.

Reaction time
Reaction time is the interval between a stimulus and the first response. It is crucial for activities like goal-keeping, sprint starts, and intercepting passes. Reaction drills using unpredictable cues or light/sound signals sharpen this attribute.

Training and assessment
Skill-related components are best trained with specific drills that mirror sporting actions. Assessment may include timed sprints for speed, Illinois agility test for agility, vertical jump for power, balance tests and reaction-time drills. Improvements in skill-related fitness often translate directly to better competitive performance.

Purpose and benefits
Fitness assessment gives objective information about a student's current strengths and weaknesses. Regular testing helps set realistic goals, track progress and evaluate the effectiveness of training programmes. In a school setting, tests should be simple, safe, repeatable and appropriate for the age group.

Selection of tests
Choose tests that measure different components: cardiovascular endurance, muscular strength and endurance, flexibility, body composition and skill-related attributes. Tests commonly used in schools include the Cooper 12-minute run or shuttle run for endurance, 1-minute sit-ups or push-ups for muscular endurance, handgrip test for strength (if equipment available), sit-and-reach for flexibility and BMI or skinfolds for body composition. For skill-related fitness, timed sprints, vertical jump and Illinois agility test are useful.

Administering tests
Plan testing days with clear instructions, demonstrations and a standard warm-up. Ensure consistent conditions: same track or court, similar weather, and standard timing methods. Encourage maximal effort but always emphasise safety and correct technique. Record the best of multiple trials where appropriate. For tests involving maximal effort, consider medical clearance for students with health issues.

Interpreting results
Compare results to normative tables where available, though adolescent growth and development must be considered—age-sex specific charts are more appropriate than adult norms. Use results to identify areas needing improvement; for example, low endurance suggests increasing aerobic sessions, while poor flexibility indicates the need to add stretching routines. Avoid comparing students publicly; focus on personal progress.

Frequency and progression
Re-assess every 6–8 weeks to monitor adaptation and guide progressive training. Use consistent tests across assessments to measure true progress. Keep careful records in a training log to show trends. Small improvements over time generally indicate good programme design and adherence.

Limitations and ethics
Field tests are useful but not perfect; they are influenced by effort, motivation and external conditions. Body composition measures like BMI have limitations for muscular individuals. Always handle results sensitively, protect student privacy and use assessments constructively to motivate positive change.

What is aerobic training?
Aerobic training involves rhythmic, sustained activities that increase heart rate and breathing and depend primarily on oxygen to produce the energy needed. It develops the cardiovascular and respiratory systems, improving the ability to perform prolonged work such as running, cycling or swimming. Regular aerobic exercise also improves metabolic health and helps control body fat.

Physiological adaptations
With regular aerobic training, the body develops increased stroke volume (more blood pumped per heartbeat), improved capillary density in muscles, greater mitochondrial numbers (better cellular energy production), and improved efficiency of oxygen transport. These adaptations reduce resting heart rate and allow higher sustained intensities without fatigue.

Types of aerobic training
Common methods include continuous (steady-state) training, where activity is performed at a moderate intensity for a set time; long slow distance training to build base endurance; and interval approaches that include longer work intervals with recovery to challenge both aerobic and anaerobic systems. Activities suitable for students include jogging, swimming, cycling, brisk walking and aerobic dance.

Intensity, duration and frequency
The effectiveness of aerobic training depends on intensity, duration and frequency. For health benefits, current targets are at least 150 minutes of moderate-intensity aerobic activity or 75 minutes of vigorous activity weekly. For fitness improvements, sessions of 20–60 minutes, 3–5 times per week are recommended, adjusted to ability. Intensity can be guided by estimated maximum heart rate (220 − age) and training at roughly 60–75% of max for moderate work, or by the talk test (ability to speak but not sing during moderate exercise).

Progression and programming
Begin with comfortable durations and increase gradually—common progression rules suggest no more than 10% increase in volume per week. Mix hard and easy days to allow recovery and avoid injury. For students, cross-training (mixing activities) reduces overuse injuries and keeps training enjoyable. Monitor for signs of overtraining, such as persistent fatigue or declining performances.

Practical tips and safety
Use suitable footwear and surfaces, stay hydrated and include warm-up and cool-down phases in every session. Children and adolescents should avoid extreme endurance events without appropriate preparation and medical guidance. Aerobic training is most effective when combined with strength and flexibility work for balanced fitness.

Understanding anaerobic work
Anaerobic exercise consists of high-intensity, short-duration efforts where the demand for energy exceeds what oxygen-based (aerobic) processes can supply. Instead, energy comes from stored ATP and anaerobic glycolysis. These activities develop power, speed and the ability to perform repeated high-intensity bursts—qualities essential in many team and field sports.

Energy systems and duration
The anaerobic energy contribution can be separated into the ATP-PCr system, providing immediate energy for 0–10 seconds, and the anaerobic glycolytic system, which supplies energy for efforts roughly 10–120 seconds. Training influences how efficiently these systems work and how well the body tolerates and clears metabolic by-products such as lactate.

Training methods
Key anaerobic methods include sprint training, high-intensity interval training (HIIT), plyometrics and heavy resistance training focusing on low reps and high loads. Sprint training develops running speed and neuromuscular coordination, HIIT improves anaerobic capacity and recovery between efforts, plyometrics increases the muscle’s explosive capabilities, and resistance training builds the force component necessary for powerful movements.

Programming and recovery
Anaerobic sessions are demanding and require careful programming: short work bouts (e.g., 10–30 seconds) with full or partial recovery periods (often equal to or longer than the work interval). Sessions should be limited in total volume to avoid overtraining—quality over quantity. Rest between sets and days is essential for energy resynthesis and muscle repair. Typical frequencies might be 2–3 anaerobic-focused sessions per week for school-aged athletes, depending on overall load.

Technique and safety
Because anaerobic work uses maximal or near-maximal efforts, technique is critical to reduce injury risk. Proper warm-up, progressions from drills to full efforts, and supervision during resistance or plyometric exercises are necessary. Adolescents should avoid maximal weight-lifting without qualified supervision and should focus on mastering movement patterns first.

Transfer to sport
Improved anaerobic capacity and power directly benefit activities like sprinting, jumping, quick changes of direction and explosive starts. Combining anaerobic training with aerobic conditioning yields balanced performance and better recovery between high-intensity efforts.

Distinguishing strength and endurance
Muscular strength is the maximum force a muscle can generate in a single contraction, while muscular endurance is the muscle's ability to sustain repeated contractions over time. Training programs emphasize different loads and repetitions depending on whether the goal is strength, hypertrophy (muscle size), or endurance.

Principles of resistance training
Resistance training relies on progressive overload—gradually increasing resistance, repetitions or volume to stimulate adaptation. Strength-focused programmes use heavier loads and lower repetitions (e.g., 1–6 reps), while endurance-focused programmes use lighter loads with higher repetitions (e.g., 12–20+ reps). For adolescents, emphasis should be on proper technique, controlled movements and gradual increases rather than lifting maximal weights.

Exercise selection and balance
Include compound multi-joint exercises (squats, lunges, presses, rows) to build functional strength and single-joint exercises for targeted muscles. Balance work across opposing muscle groups (e.g., quadriceps and hamstrings) to prevent imbalances that can cause injury. Core strengthening (planks, dead bugs) supports posture and transfer of force during sport.

Training structure and frequency
A typical school programme might include 2–3 resistance sessions per week, each 30–45 minutes, allowing 48 hours of recovery for worked muscle groups. Sets and repetitions depend on goals: strength (3–6 sets of 3–6 reps), hypertrophy (3–4 sets of 6–12 reps), endurance (2–4 sets of 12–20 reps). Rest periods vary—longer rests for heavy strength work and shorter rests for endurance circuits.

Safety and supervision
Ensure proper warm-up, correct technique and progression. Use spotters or supervised environments for heavier lifts. Avoid maximal lifts for inexperienced adolescents and focus on bodyweight and light external resistance progressing sensibly. Monitor for signs of overtraining like persistent soreness, sleep disturbance or reduced performance.

Functional transfer
Design strength sessions that mimic sport demands to improve practical performance; for example, include unilateral exercises for sports requiring single-leg stability. Combining strength training with aerobic work and skill practice optimises overall fitness for school sports.

Definitions and importance
Flexibility is the ability of muscles and joints to move through a full range of motion, while mobility includes the control and strength required to use that range effectively. Both are essential for efficient movement, injury prevention and optimal performance. Adequate flexibility reduces muscle strain risk and allows better technique in many activities.

Types of stretching and when to use them
Static stretching involves holding a muscle at its end range for 15–60 seconds and is effective for increasing muscle length over time; it is best performed after exercise when muscles are warm. Dynamic stretching uses controlled movements that take joints through their range and is ideal in warm-ups to increase blood flow and neuromuscular readiness. PNF (Proprioceptive Neuromuscular Facilitation) combines contraction and relaxation phases with partner assistance and can produce faster gains in flexibility when applied correctly.

Mobility training
Mobility exercises emphasise joint control across the range, combining movement and strength. For example, deep squats with controlled rise, thoracic rotations, and ankle mobility drills improve functional movement patterns. Mobility work reduces compensations and supports skill execution.

Designing routines
Include dynamic stretches in the pre-activity warm-up, focusing on muscles and joints relevant to the sport. Reserve static stretches for post-activity to assist recovery and long-term flexibility gains. A balanced routine addresses major areas: shoulders, spine, hips, hamstrings, quadriceps and calves. Frequency matters: short daily mobility sessions are often more effective than occasional long sessions.

Progression and safety
Improve flexibility gradually, avoiding ballistic or bouncing techniques which risk overstretching. Breathe steadily and relax into stretches. Use PNF only with trained partners or instructors. If tightness persists, examine strength imbalances—sometimes strengthening weak opposing muscles helps restore range.

Assessment and transfer
Use sit-and-reach tests for basic hamstring flexibility and joint-specific tests where needed. Improved flexibility supports better movement mechanics, reduces injury probability and contributes to more efficient performance in sports and daily activities.

Understanding body composition
Body composition refers to the relative amounts of fat mass and lean mass (muscle, bone, organs) in the body. Unlike simple body weight, composition gives a clearer picture of health and fitness because two people of the same weight can have very different proportions of muscle and fat. For adolescents, body composition changes with growth and puberty, so interpretation must use age- and sex-appropriate references.

Common assessment methods
Schools commonly use Body Mass Index (BMI) because it requires only height and weight, but BMI has limitations: muscular students may have higher BMI without excess fat. Skinfold measurements with calipers provide a direct estimate of subcutaneous fat when performed by trained assessors. Bioelectrical impedance devices estimate body fat by measuring electrical resistance but can be affected by hydration status. Waist circumference gives information about central fat, which is linked more strongly to health risks. For accurate clinical assessment, advanced methods exist but are not usually necessary in schools.

Healthy composition versus appearance
Focusing only on appearance can be harmful, especially for adolescents. Healthy body composition supports strength, endurance and daily function and reduces risk of metabolic diseases. Encourage goals related to performance, energy levels and health markers rather than cosmetic ideals. Discuss healthy changes gradually and respectfully, avoiding shaming language or public comparisons.

How exercise and diet affect composition
Fat loss occurs when energy expenditure exceeds intake over time. Aerobic exercise increases calorie burn, resistance training builds or preserves muscle mass, and both together improve resting metabolic rate. Adequate protein supports muscle repair and growth; carbohydrates fuel training; healthy fats support hormones. Crash diets, extreme restriction or dehydration to 'drop weight' are unsafe for growing adolescents. Sustainable changes combine consistent physical activity, balanced meals and gradual adjustments to eating patterns.

Practical school strategies
Promote varied physical activities including aerobic sessions, resistance circuits and games. Teach students to keep simple food logs and make small changes—choosing whole grains, more vegetables and limiting sugar-sweetened drinks. Encourage family involvement for consistent meal patterns. Use assessments sensitively: private feedback, emphasise trends over single measurements, and link advice to improving fitness and wellbeing.

When to refer and special concerns
If a student shows rapidly changing weight, signs of eating disorders, or medical concerns (such as undernutrition or obesity-related conditions), involve school health services and parents and refer to qualified professionals. Supportive, non-judgemental communication is key when addressing body composition in adolescents.

Purpose of warm-up
Warm-up prepares the body physiologically and mentally for exercise. It raises muscle temperature, increases blood flow, improves joint lubrication, enhances nerve conduction and primes the specific muscles and movement patterns that will be used. A proper warm-up reduces injury risk and improves performance.

Components of an effective warm-up
A well-structured warm-up has three parts: (1) general aerobic activity (5–10 minutes of light jogging, skipping, or cycling) to raise core temperature; (2) dynamic mobility and sport-specific movements (leg swings, hip openers, arm circles, lunges with rotation) to activate relevant muscle groups and joint ranges; (3) technical or rehearsal drills at gradually increasing intensity (short accelerations, skill patterns) to prepare the nervous system for game-level actions.

Purpose of cool-down
Cool-down helps the body transition from exercise to rest. It gradually reduces heart rate and blood pressure, promotes venous return, aids metabolic waste removal (like lactic acid) and reduces post-exercise stiffness. Cool-down also provides an opportunity for static stretching to improve flexibility and for brief reflection on session outcomes.

Components of a cool-down
Start with 5–10 minutes of low-intensity activity (walking, slow jogging or easy cycling), then perform static stretches for the main muscle groups used during the session, holding each for 15–30 seconds. Include deep breathing and relaxation techniques, and address any immediate minor injuries or soreness.

Designing routines for students
Match the warm-up and cool-down to the main activity. For running, include strides and mobility for hips and ankles; for racket sports, include shoulder and thoracic mobility and quick footwork drills. In cold weather, lengthen the warm-up to ensure muscles reach sufficient temperature. For students with injuries, modify movements to maintain safety and seek teacher guidance.

Practical tips and safety
Avoid static stretching of cold muscles as it may reduce power and increase injury risk. Monitor students for signs of dizziness or overexertion during warm-up. Encourage hydration before and after activity, and ensure footwear and clothing are appropriate. Teaching students the rationale behind each phase promotes adherence and safer practice habits.

Why principles matter
Training principles provide a framework to design programmes that produce steady, measurable improvements while minimising injury and overtraining. Understanding these principles helps teachers and students make informed choices about what to train, how often, and how much to increase workload. For adolescents, applying principles ensures healthy development as bodies grow and change.

Specificity
Specificity means the body adapts to the particular demands placed on it. Training should match the energy system, muscles and movement patterns used in the sport or activity. For instance, to improve sprinting performance, practise short, high-intensity runs and power exercises rather than only doing long slow runs.

Overload and progression
Overload requires training beyond normal levels to stimulate adaptation. Progression is the planned, gradual increase of that overload so the body can safely adapt. Common practical guidelines include increasing training volume or intensity by about 5–10% per week, varying one variable at a time, and allowing recovery weeks after several weeks of progression to consolidate gains.

Reversibility and maintenance
The reversibility principle states that gains are lost if training ceases. This highlights the importance of maintaining a baseline of activity, especially during school holidays. Maintenance programmes of reduced volume but preserved intensity can help sustain fitness with less time commitment.

Individuality and age considerations
Individuals respond differently to the same training due to genetics, maturation, prior experience and lifestyle. Adolescents require programmes tailored to growth stages: avoid excessive maximal loads, emphasise technique, and adjust volumes to avoid disrupting growth or sleep. Monitor each student and adapt plans accordingly.

Variation and periodisation
Variation prevents boredom and plateaus by changing training stimuli. Periodisation organises training into cycles (micro, meso, macro) with planned phases for base-building, intensity, competition and recovery. In schools a simplified approach works well: alternate hard and easy weeks, vary session types across a week, and plan lighter loads during exam periods.

Recovery, adaptation and safety
Adaptation occurs during recovery. Adequate sleep, nutrition and rest days are essential. Signs of poor recovery include persistent fatigue, poor performance and mood changes. Safety demands correct technique, supervision for resistance work, and gradual progressions. Applying these principles together produces balanced training that supports long-term health and performance.

Overview of methods
Training methods are the practical ways we apply principles to achieve different goals. Selecting appropriate methods depends on the component targeted (endurance, strength, power, flexibility) and the student's age, experience and schedule. Common methods include continuous training, interval training, fartlek, circuit training, resistance training, plyometrics and dedicated flexibility sessions.

Continuous training
Continuous or steady-state training involves performing an activity at a moderate intensity for a sustained period and is effective for developing aerobic base. It is simple to implement: examples are steady runs, continuous cycling or long swims lasting 20–60 minutes. For beginners it is an excellent starting point.

Interval and fartlek training
Interval training alternates high-intensity work with recovery periods to stress both aerobic and anaerobic systems. For example, repeat 400 m fast runs with jogging rests. Fartlek, Swedish for 'speed play', is less structured—intensity varies by feel or terrain—and is useful for developing pace judgement and injecting variety into training.

Circuit training
Circuit training arranges several stations of exercises (strength, endurance, skill) performed in sequence with short rests. Circuits are time-efficient, suitable for groups, and can be modified for different fitness levels. A circuit might include push-ups, squats, skipping, shuttle runs and planks, each performed for a set time.

Resistance and plyometric methods
Resistance training uses weights or bodyweight to build strength and muscle. Structure depends on goals: heavy loads with few reps for strength, moderate loads with moderate reps for hypertrophy, and light loads with many reps for endurance. Plyometrics focus on explosive movements—jumps, bounds and medicine ball throws—to build power. Both require technique coaching and adequate recovery, especially for adolescents.

Flexibility and mobility sessions
Dedicate sessions or include short daily routines to improve range of motion and joint control. Dynamic mobility belongs in warm-ups; static stretching fits post-session. PNF techniques may be used under supervision for faster gains.

Designing a session
A well-designed session includes a tailored warm-up, a main block using one or a combination of methods with clear structure (sets, reps, times), and a cool-down. Match intensity to the group's readiness and alternate harder and easier days across the week. For school contexts, plan variety to keep students engaged while ensuring progressive overload and recovery.

Start with assessment and goals
Designing a personal fitness programme begins with assessment: basic field tests, a review of daily routines, sleep and diet, and any health considerations. Use this information to set SMART goals that are Specific, Measurable, Achievable, Relevant and Time-bound. For example: 'Reduce 1.5 km run time by 60 seconds in eight weeks' or 'Increase the number of correct push-ups to 20 in six weeks'. Clear goals guide method selection and make progress measurable.

Choose priorities and methods
Identify the primary fitness components to improve (endurance, strength, flexibility, body composition or skills) and select training methods that match those goals. For endurance choose continuous and interval training; for strength select resistance sessions; for power include plyometrics; for flexibility include daily mobility work. Combine methods to build balanced fitness and prevent overuse injuries.

Structure weekly plans
Use the FITT model—Frequency, Intensity, Time, Type—to plan sessions. For general fitness a practical weekly structure for a student might include 3 aerobic sessions, 2 strength or circuit sessions, daily short mobility work and one rest or active recovery day. Distribute intensity so hard sessions are followed by easier days. Consider school timetables and exam periods and reduce load during busy weeks.

Progression and monitoring
Plan progressive increases in volume or intensity, such as a 5–10% weekly increase in time or distance, and include planned recovery weeks. Keep a training log noting date, activity, duration, intensity (RPE), sleep and any soreness. Reassess with the same tests every 6–8 weeks and adjust the plan based on results and subjective feedback to ensure steady, safe improvement.

Safety, nutrition and recovery
Include warm-ups and cool-downs, teach correct technique, and ensure supervision for resistance work. Ensure sufficient sleep and balanced meals to support adaptation—nutrition and hydration are integral to programme success. Modify sessions for injury, growth-related issues or illness and seek professional guidance when needed.

Practical tips for adherence
Make the programme enjoyable with variety, include social activities or team sessions, set short-term milestones and celebrate small wins. Involve parents for support in meal planning and time management. A realistic, flexible programme that fits the student's life is more likely to be followed and to produce lasting benefits.

Nutrition basics for active students
Good nutrition supports energy needs, growth, repair and recovery. A balanced diet for active adolescents includes adequate carbohydrates (the main fuel for training), protein (for muscle repair and growth), healthy fats (for essential functions), vitamins and minerals (for metabolism and bone health) and fibre for digestive health. Meals should be regular and include a variety of foods to meet micronutrient needs.

Meal timing
Timing meals around training improves performance and recovery. A light carbohydrate snack 30–60 minutes before activity can provide ready energy without causing stomach discomfort—examples include a banana or plain porridge. After exercise, a combination of carbohydrate and protein within 30–60 minutes aids glycogen replenishment and muscle repair—yoghurt with fruit or a sandwich with lean protein are good options.

Hydration principles
Maintaining hydration before, during and after exercise is essential. Start activity well hydrated by drinking water in the hours before exercise. During sessions under an hour, sip water regularly; for activities over an hour or in hot conditions, electrolyte-containing drinks help replace salts lost in sweat. Monitor urine colour as a simple hydration guide—pale yellow indicates good hydration, dark suggests a need for more fluids.

Special considerations for adolescents
Adolescents have higher nutrient needs because of growth. Avoid restrictive diets or supplements without professional advice. Encourage whole foods rather than processed snacks and limit sugary drinks. Calcium and vitamin D are important for bone development; iron is critical especially for girls to prevent anaemia—encourage iron-rich foods like lentils, green leafy vegetables and fortified cereals.

Supplements and performance aids
Most students do not need supplements if they eat a balanced diet. Avoid performance-enhancing substances and seek teacher or parental guidance before using any supplement. If supplements are considered, consult a qualified nutrition professional or doctor.

Practical tips
Plan snacks and meals around school and training schedules, pack balanced lunchboxes, and teach students to read food labels. Promote family involvement in healthy eating and establish regular meal patterns to support training and school life.