Final answer:
The ISSA recommends that the intensity level of exercise be 85% to 95% of VO2max.
Step-by-step explanation:
The subject of this question is Health. The ISSA, which stands for International Sports Sciences Association, recommends that the intensity level of exercise be 85% to 95% of VO2max. VO2max is a measure of the maximum amount of oxygen a person can use during intense exercise and is used as an indicator of aerobic fitness. By exercising within this recommended intensity range, individuals can maximize the benefits of their workout and improve their overall fitness.