“Good quality product, simple construction. Easy to put together.Use the ab wheel carefully, just a few reps to start. You won't feel it as you do it, but the next day you WILL. However, do it every day and you will build up your endurance and ab strength. Do low reps, but hold them for maximum results. Great Core exercise, but use with caution.Push-up bars are also a great exercise, as they allow you to go DEEP and really stretch your pecs. Of course, push-ups are about the best upper body exercise you can do, and these bars help your “form' tremendously. Builds your triceps, deltoids, lats, and pecs (and by default your forearms).”