Which of the Following Is a Guideline That Should Be

Which of the following is a guideline that should be followed prior to initiating an exercise program?

A) General precautions that one should be aware of involve safety factors, timing of meals, and environmental
Hazards, with a hot environment posing the most serious threat.
B) It is necessary for all those over thirty to have a medical examination before initiating an exercise program.
C) If one moderates the duration of the initial exercise program, high-intensity exercise at this time will expedite the predetermined goals.
D) All of the answers are correct.