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How Long. For walking, bike riding or other moderate exercise -- rigorous enough so that it's hard but not impossible to talk -- seniors should slowly build up to 30-minute workouts. And if 30 minutes all at once is impossible, two 15-minute sessions or three 10-minute workouts are fine.
1. Keep your own schedule of cardiovascular exercise, if you are already exercising for 30 minutes 3 to 4 times per week. Add some interval exercises at the beginning, middle or end of your exercise routine to increase your heart rate and burn extra calories.. Keep your own schedule of cardiovascular exercise, if you are already exercising for 30 minutes 3 to 4 times per week. Add some interval exercises at the beginning, middle or end of your exercise routine to increase your heart rate and burn extra calories.