Health and Fitness Assessment
The Health and Fitness Assessment domain tests standardized measurement and interpretation. You must know the order of testing, proper technique for resting measures, and the difference between a screening result and a diagnosis.
Core rules
- Obtain informed consent and health history first. Resting HR, BP, height, weight, and waist circumference precede exercise tests.
- BP technique: seated quietly for about 5 minutes, back supported, feet flat, arm supported at heart level, correct cuff size, no talking. Take at least two readings and average them. A cuff that is too small falsely raises BP.
- BMI = weight (kg) ÷ height (m)². It is a screening tool, not a body-composition diagnosis; athletes may be classified “overweight” by BMI.
- Waist circumference and waist-to-height ratio add central-adiposity information.
- CRF testing: choose submaximal or maximal based on risk and purpose. Muscular strength/endurance and flexibility tests follow cardiorespiratory testing because fatigue alters results.
- Reliability is consistency; validity is whether a test measures what it claims. Standardize instructions, equipment, and technician to reduce error.
Worked example
A 52-year-old client has a first BP reading of 138/86 mmHg and a repeat after 5 minutes of 136/84 mmHg. Average = 137/85 mmHg. By ACC/AHA categories, this is stage 1 hypertension (130–139 or 80–89 mmHg), because classification uses the higher category. The correct action is to document, educate, and refer for medical evaluation; the exercise physiologist does not diagnose hypertension. A single elevated reading would not be enough, and a repeat average is required.
Traps
- Taking one BP reading and treating it as definitive.
- Using a cuff that is too small or measuring over clothing.
- Measuring BP immediately after exercise or caffeine.
- Presenting BMI as a measure of body fat.
- Doing maximal exercise testing before resting measures.
- Confusing reliability with validity.
- Failing to document the test conditions and the client’s response.