Final answer:
Older adults should aim for at least 2.5 hours of moderate aerobic activity per week, which could translate to training about three times a week. Each session should allow for a day of rest in between to facilitate recovery, especially for those who are not used to high-intensity exercise.
Step-by-step explanation:
Frequency of Training for Older Adults
For an older adult following a cardio program, the frequency of training is dependent on the individual's health status, fitness goals, and the intensity of exercise they can safely perform. According to the U.S. Department of Health and Human Services (HHS), adults should engage in at least 2.5 hours of moderate aerobic physical activity per week, or 1.25 hours at vigorous intensity. Therefore, for older adults, a good recommendation might be to engage in a moderate exercise program about three times per week, ensuring at least one day of rest between sessions to allow for recovery.
Considering the various types of exercise programs such as low intensity or skill-based activities, which might be daily due to their gentle nature, or an endurance program which may consist of 1-3 hours per day of moderate to high-intensity exercise, the training frequency can vary. However, for older adults, particularly those who are not accustomed to high-intensity workouts, starting with a moderate exercise program and allowing for rest is generally safe and effective.