What are ACSM recommendations for flexibility training?
a. stretching should immediately precede a workout and be performed 2-3 days per week
b. stretching to the point of tightness (but not to pain) and holding the stretch for 30-40 seconds
c. only the most used muscle groups need stretching
d. stretching should be performed no less than 2-3 days per week, but ideally 5-7 days per week
Answer: D