I work out at a gym three days a week and have done so for many years. Now that I am 75 my routine is a little different. I still use weights and exercise machines such as Hammer Strength - but I limit myself to four sets of each exercise. I break down my routine as follows: Monday- Chest, bis, and forearms. Chest is four exercises with four sets each. Bis three exercises with four sets. Forearms is two exercise with four sets. Wednesday is back (four exercises with four sets) and tris (three exercises with four sets). Friday is legs and shoulders each with four exercises and four sets. I try to walk or run on a treadmill after my weight workout.