This cheat sheet covers high-intensity interval training and plyometric exercise for safe, effective physical education workouts. Students need it to understand how to plan intervals, manage intensity, and choose explosive movements that match their fitness level. It also helps students connect training choices to speed, power, endurance, and injury prevention.
Key Facts
- HIIT uses repeated hard efforts followed by recovery periods, such as 30 seconds work and 30 to 90 seconds rest.
- Work-to-rest ratio is written as work time:rest time, so 20 seconds work and 40 seconds rest equals 1:2.
- Estimated maximum heart rate can be found with Max HR = 220 - age.
- Target heart rate for vigorous training is often 70% to 85% of Max HR, found with Target HR = Max HR x intensity percentage.
- Rate of perceived exertion uses a 1 to 10 scale, and HIIT work intervals usually feel like RPE 7 to 9.
- Plyometrics train explosive power using a quick stretch and strong push, such as jump squats, bounds, or clap push-ups.
- Safe landing mechanics include knees tracking over toes, hips back, chest up, and quiet landings on the balls of the feet.
- A basic session order is warm-up, skill practice, main HIIT or plyometric sets, cool-down, and recovery stretching.
Vocabulary
- HIIT
- High-intensity interval training is exercise that alternates short hard work periods with planned recovery periods.
- Plyometrics
- Plyometrics are explosive exercises that use quick loading and pushing movements to build power.
- Work-to-rest ratio
- Work-to-rest ratio compares the length of the effort period to the length of the recovery period.
- Target heart rate
- Target heart rate is the heart rate range used to guide exercise intensity during a workout.
- RPE
- Rate of perceived exertion is a 1 to 10 scale that measures how hard exercise feels.
- Landing mechanics
- Landing mechanics are the body positions used to absorb force safely after a jump.
Common Mistakes to Avoid
- Skipping the warm-up is wrong because cold muscles and stiff joints are less prepared for sprinting, jumping, and quick direction changes.
- Using maximum effort on every interval is wrong because HIIT should be intense but controlled enough to keep safe form across the workout.
- Letting the knees collapse inward during landings is wrong because it places extra stress on the knees and reduces power transfer.
- Choosing advanced plyometrics too soon is wrong because high-impact jumps require strength, balance, and proper landing skill first.
- Ignoring rest periods is wrong because recovery allows the next work interval to stay powerful, safe, and technically correct.
Practice Questions
- 1 A 16-year-old student estimates Max HR = 220 - age. What is the student's estimated maximum heart rate?
- 2 A workout uses 30 seconds of hard work followed by 60 seconds of rest. What is the work-to-rest ratio?
- 3 A student has an estimated Max HR of 204 beats per minute. What is 80% of Max HR?
- 4 Explain why quiet, controlled landings are important during plyometric training.