Final answer:
The ISSA does not recommend that the intensity level of exercise be 85% to 95% of VO2max; instead, U.S. Department of Health and Human Services recommends moderate to vigorous physical activity, with guidelines suggesting 2.5 hours of moderate-intensity exercise weekly for adults.
Step-by-step explanation:
The statement that the ISSA recommends that the intensity level of exercise be 85% to 95% of VO2max is false. While VO2max is a measure of the maximum amount of oxygen a person can utilize during intense exercise, the U.S. Department of Health and Human Services (HHS) recommends moderate-intensity or vigorous-intensity exercise, not necessarily as high as 85-95% of VO2max. For instance, moderate activities are those during which a person could talk but not sing, and vigorous activities are those during which a person could say only a few words without stopping to breathe.
The recommended guidelines suggest that adults aged 18 to 64 should engage in 2.5 hours of moderate-intensity (or 1.25 hours of vigorous intensity) aerobic physical activity each week for health benefits, such as maintaining physical fitness and wellbeing, showing that reaching such extreme percentages of VO2max is not required for gaining health benefits from exercise.