What risk stratification category would require physician supervision during exercise testing?

Low-risk individuals do not require physician supervision during submaximal testing because their risk profile is too low to warrant medical oversight at any exercise intensity.

Low-risk individuals do not require physician supervision even during maximal testing, as their stratification indicates a low probability of adverse cardiovascular events regardless of intensity.

Moderate-risk individuals undergoing submaximal testing do not require physician supervision; the supervision requirement at moderate risk applies only when maximal testing is performed.

According to ACSM guidelines, moderate-risk individuals require physician supervision specifically during maximal exercise testing because maximal effort poses a higher cardiovascular challenge that warrants direct medical oversight. Low-risk individuals do not require supervision at any intensity, while high-risk individuals require supervision for both submaximal and maximal testing. The threshold for required supervision at moderate risk is triggered only by the intensity level of maximal testing.