In this over 50 group, I was curious as to who took vitamins and what kind. Do they help you with working out and bike riding? My wife is on my case and says I should take them as I work out at the gym 3 times a week and then (weather & time permitting) ride bikes as often as possible. When taking them, I have been unable to tell any difference in energy levels. For me, the main difference is an increased appetite.