PE18: Optimising Training and Preventing Injury
Calculating max HR and training zones, one rep max, warm up procedures and strategies to prevent injury.
💓 Calculating Maximum Heart Rate
Maximum Heart Rate = 220 - Age
Example: A 16-year-old has a max HR of 220 - 16 = 204 bpm
Example: A 30-year-old has a max HR of 220 - 30 = 190 bpm
Example: A 16-year-old has a max HR of 220 - 16 = 204 bpm
Example: A 30-year-old has a max HR of 220 - 30 = 190 bpm
Important: This formula gives an estimate. Individual max HR can vary by ±10 bpm. However, it is the standard method used for calculating training zones.
📊 Training Zones
Training zones are heart rate ranges that correspond to different exercise intensities. Training in the correct zone ensures you are working the appropriate energy system.
| Zone | % of Max HR | Energy System | Purpose | Example (16-year-old, max HR 204) |
|---|---|---|---|---|
| Aerobic zone | 60-80% | Aerobic | Develop cardiovascular endurance; improve aerobic fitness | 122-163 bpm |
| Anaerobic zone | 80-90% | Anaerobic (lactic acid) | Develop anaerobic capacity; improve lactate threshold | 163-184 bpm |
| Maximal zone | 90-100% | ATP-PC (alactic) | Develop maximum speed and power | 184-204 bpm |
Calculating Training Zones
For a 17-year-old:
Max HR = 220 - 17 = 203 bpm
Aerobic zone (60-80%): 203 × 0.60 = 121.8 → 122 bpm; 203 × 0.80 = 162.4 → 162 bpm
Zone: 122-162 bpm
Anaerobic zone (80-90%): 203 × 0.80 = 162 bpm; 203 × 0.90 = 182.7 → 183 bpm
Zone: 162-183 bpm
🏋️ One Rep Max (1RM) Calculations
One Rep Max (1RM) is the maximum weight that can be lifted once with correct technique for a given exercise. It is used to set training intensities for weight training.
Estimating 1RM:
If an athlete can lift 60kg for 8 reps (but no more), their estimated 1RM can be calculated:
1RM = Weight lifted × (1 + (Reps ÷ 30))
1RM = 60 × (1 + (8 ÷ 30)) = 60 × 1.267 = 76 kg
Training intensities based on 1RM:
Strength: 85-100% of 1RM (1-5 reps)
Hypertrophy: 67-85% of 1RM (6-12 reps)
Muscular endurance: 50-67% of 1RM (12-20+ reps)
Power: 75-90% of 1RM (explosive, 1-5 reps)
If an athlete can lift 60kg for 8 reps (but no more), their estimated 1RM can be calculated:
1RM = Weight lifted × (1 + (Reps ÷ 30))
1RM = 60 × (1 + (8 ÷ 30)) = 60 × 1.267 = 76 kg
Training intensities based on 1RM:
Strength: 85-100% of 1RM (1-5 reps)
Hypertrophy: 67-85% of 1RM (6-12 reps)
Muscular endurance: 50-67% of 1RM (12-20+ reps)
Power: 75-90% of 1RM (explosive, 1-5 reps)
Calculating Training Weight from 1RM
An athlete has a bench press 1RM of 100kg. They want to train for hypertrophy at 75% of 1RM:
Training weight = 100 × 0.75 = 75 kg
For muscular endurance at 60% of 1RM:
Training weight = 100 × 0.60 = 60 kg
🔥 The Warm Up
Why warm up? A warm-up prepares the body physically and mentally for exercise, reducing the risk of injury and improving performance.
Three Parts of a Warm-Up
- Pulse-raiser (cardiovascular): 5-10 minutes of light aerobic activity (e.g. jogging, cycling, skipping) to gradually raise heart rate, increase blood flow to muscles and raise body temperature. This makes muscles more pliable and ready for work.
- Stretching (mobility): 5-10 minutes of stretching to increase the range of movement at joints. Dynamic stretching (moving through a range of motion) is preferred before exercise. Static stretching can be used but should follow the pulse-raiser when muscles are warm.
- Skill-related practice: Sport-specific drills that replicate the movements of the upcoming activity (e.g. passing drills in football, serving practice in tennis, shadow boxing in boxing). This prepares the neuromuscular system and practises technique.
Physiological Effects of a Warm-Up
- Increased heart rate and blood flow to working muscles
- Increased muscle temperature (improved elasticity and speed of contraction)
- Increased body temperature (faster nerve impulse transmission)
- Increased production of synovial fluid at joints (reduced friction)
- Increased oxygen delivery to muscles (vasodilation)
- Improved mental focus and readiness
- Reduced risk of muscle strains and ligament sprains
🛡️ Injury Prevention Strategies
Key principle: Prevention is always better than cure. The following strategies reduce the risk of injury during training and sport.
Proper Warm-Up
Always perform a thorough warm-up before exercise. A warm-up increases muscle temperature, joint mobility and mental readiness, significantly reducing the risk of strains, sprains and tears.
Appropriate Clothing and Footwear
- Wear clothing appropriate for the sport and weather conditions
- Wear correctly fitted footwear that provides support and cushioning
- Use protective equipment where required (shin pads, mouthguards, helmets)
- Wear layers in cold weather to maintain muscle temperature
Hydration
- Drink water before, during and after exercise
- Dehydration reduces performance and increases the risk of heat-related illness
- Aim for 200-300ml every 15-20 minutes during exercise
- Urine colour is a good indicator - pale yellow indicates adequate hydration
Correct Technique
- Use proper technique for all exercises and sport-specific skills
- Poor technique places undue stress on joints, ligaments and muscles
- Seek coaching to ensure correct form, especially in weight training
- Gradually increase intensity rather than attempting too much too soon
Rest Days
- Include rest days in the training programme to allow the body to recover
- Training every day without rest leads to overtraining, fatigue and increased injury risk
- Aim for at least 1-2 rest days per week
- Use active recovery (light exercise such as walking or swimming) on rest days
| Strategy | How It Prevents Injury |
|---|---|
| Warm-up | Increases muscle elasticity and joint mobility; prepares body for action |
| Correct footwear | Provides support and cushioning; reduces impact on joints |
| Hydration | Prevents heat illness; maintains blood volume and muscle function |
| Correct technique | Reduces stress on joints, ligaments and muscles |
| Rest days | Allows recovery and repair; prevents overtraining and fatigue-related injuries |
| Protective equipment | Shields vulnerable body parts from impact (e.g. shin pads, helmets) |
❓ Practice Questions
Q1: Calculate the maximum heart rate and aerobic training zone for a 20-year-old.
Q2: Describe the three parts of a warm-up and explain why each is important.
Q3: An athlete can lift 80kg for 6 reps on bench press. Estimate their 1RM.
Q4: Explain why training at 80-90% of max HR develops the anaerobic system.
Q5: Describe three injury prevention strategies and explain how each works.
Q6: Why are rest days important in a training programme?
✅ Answers
- Max HR = 220 - 20 = 200 bpm. Aerobic zone (60-80%): 200 × 0.60 = 120 bpm; 200 × 0.80 = 160 bpm. Aerobic zone = 120-160 bpm.
- (1) Pulse-raiser: 5-10 minutes of light aerobic activity to raise heart rate and body temperature, making muscles more elastic. (2) Stretching: dynamic and/or static stretches to increase joint range of movement and reduce muscle stiffness. (3) Skill-related practice: sport-specific drills to prepare the neuromuscular system and practise technique before full-intensity activity.
- 1RM = 80 × (1 + (6 ÷ 30)) = 80 × 1.2 = 96 kg.
- Training at 80-90% of max HR requires the body to work at an intensity where the aerobic system alone cannot supply enough energy. The anaerobic (lactic acid) system must contribute significantly to meet the energy demand, producing ATP rapidly without oxygen. This trains the body to tolerate and process lactic acid more effectively, improving the lactate threshold.
- (1) Proper warm-up: increases muscle temperature and elasticity, and joint mobility, reducing the risk of strains and sprains. (2) Correct footwear: provides support and cushioning for the feet and joints, reducing impact forces and preventing ankle and knee injuries. (3) Correct technique: ensures forces are applied through the body correctly, reducing unnecessary stress on joints, ligaments and muscles.
- Rest days are essential because they allow the body to recover and repair from training. Muscles need time to rebuild (repairing micro-tears from training causes hypertrophy). Without rest, the body accumulates fatigue, leading to overtraining syndrome, reduced performance and increased injury risk. Rest also allows energy stores (glycogen, PC) to be replenished.
🎯 Exam Tips
- Practise max HR and training zone calculations until they are automatic
- Always show your working in calculation questions
- The warm-up has THREE parts: pulse-raiser, stretching, skill-related practice
- Know the difference between aerobic (60-80%) and anaerobic (80-90%) training zones
- 1RM calculations are Higher tier - learn the formula
- Injury prevention is about being proactive, not reactive
📝 Exam Technique
PE Exam Tips — Optimising Training and Preventing Injury:
1. For Optimising Training and Preventing Injury questions, use subject-specific terminology precisely
2. Support every point with specific evidence or examples
3. Show balanced analysis — consider different perspectives before reaching a conclusion
4. Link your understanding of Optimising Training and Preventing Injury to real-world contexts where possible
5. For longer answers, plan your response to address all parts of the question
1. For Optimising Training and Preventing Injury questions, use subject-specific terminology precisely
2. Support every point with specific evidence or examples
3. Show balanced analysis — consider different perspectives before reaching a conclusion
4. Link your understanding of Optimising Training and Preventing Injury to real-world contexts where possible
5. For longer answers, plan your response to address all parts of the question
⚠️ Common Errors
Watch Out!
Students often think fitness and health are the same thing. Wrong: Fitness and health are the same thing Correct: Health is a state of complete physical, mental and social well-being (WHO). Fitness is the ability to meet the demands of the environment. You can be fit but unhealthy (e.g. a marathon runner with flu).
Students often think static stretching is the best warm-up. Wrong: Static stretching is the best warm-up Correct: Current evidence suggests dynamic stretching is more effective in warm-ups as it mimics sporting movements. Static stretching may actually reduce power output if held too long before activity.
Students often think no pain, no gain is a good training principle. Wrong: No pain, no gain is a good training principle Correct: Pain can indicate injury. Progressive overload should be gradual — the 10% rule suggests not increasing training load by more than 10% per week. Ignoring pain leads to overuse injuries.
✍️ Model Answer
Full-Mark Response
6 marks: Explain how optimising training and preventing injury affects sporting performance.
Optimising Training and Preventing Injury has significant effects on sporting performance. [Key concept 1]: explain the mechanism with specific detail. [Key concept 2]: how this applies in a named sporting example. [Key concept 3]: the relationship between this topic and overall performance. A grade 9 answer uses precise anatomical/physiological terminology, specific sporting examples, and evaluates the relative importance of different factors.
Mark scheme: 2 marks per explained point with specific evidence, evaluation for top marks
📊 AO Deep Dive
Assessment Objective Analysis
GCSE PE tests four AOs: AO1 (Knowledge, 30%) — recall facts about Optimising Training and Preventing Injury including definitions, classifications and specific examples; AO2 (Application, 30%) — apply knowledge to sporting contexts and training scenarios; AO3 (Analysis and Evaluation, 25%) — analyse data (graphs, tables), evaluate training methods or strategies, and justify recommendations; AO4 (Practical, 15%) — demonstrate relevant skills. For grade 9, use precise terminology, support every point with named sporting examples, and evaluate rather than just describe. The difference between grade 5 and grade 9 is the quality of application and depth of evaluation.
📝 Exam Questions by Topic
🎬 Video Resources
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