Special Populations and Environmental Considerations
This domain tests how biomechanics changes for youth, older adults, and other special populations, and how heat, cold, and altitude alter movement and safety. Items ask you to adjust load, volume, or exercise choice.
Core rules
- Youth: growth plates are vulnerable to repetitive high load and impact; supervised resistance training with good technique is appropriate, but maximal loading and high-volume plyometrics need caution.
- Older adults: sarcopenia reduces force and power; power training and balance work preserve function. Bone density and joint health affect impact tolerance.
- Obesity changes mechanics: greater body mass increases joint forces and can alter gait and squat depth; use manageable ranges and stable positions.
- Heat: dehydration reduces plasma volume, raises heart rate, and increases cardiovascular drift; use WBGT, hydration, and gradual acclimatization.
- Altitude: lower oxygen availability reduces aerobic power; adjust intensity and allow acclimatization.
- Cold: reduced tissue temperature can impair force and proprioception; warm up thoroughly.
Worked example
An older adult wants to improve stair climbing. Instead of heavy squats only, prescribe sit-to-stands and step-ups at a moderate load moved with intent, plus single-leg balance. The reasoning: stair climbing requires force and power in a narrow base, so train both strength and rapid force production, then challenge balance. Progress load by 5–10% when technique is stable, and avoid adding high-impact plyometrics until impact tolerance is established.
Traps
- Applying adult maximal-load programs directly to youth.
- Training older adults only with slow, light exercise and ignoring power.
- Ignoring environmental stress when interpreting heart rate or fatigue.
- Progressing impact before tissue tolerance.