The ACSM recommendation for intensity, duration, and frequency of cardiorespiratory exercise for apparently healthy individuals includes _____.
a. intensity of 60%-90% maximal heart rate (HRmax), duration of 20-60 min, and frequency of 3-5 d a week
b. intensity of 85%-90% HRmax, duration of 30 min, and frequency of 3 d a week
c. intensity of 50%-70% HRmax, duration of 15-45 min, and frequency of 5 d a week
d. intensity of 60%-90% HRmax reserve, duration of 20-60 min, and frequency of 7 d a week
Answer: a. intensity of 60%-90% maximal heart rate (HRmax), duration of 20-60 min, and frequency of 3-5 d a week