A good sit-up bench should make core training harder, safer, and easier to progress. A bad one wobbles, pinches behind the knees, forces an awkward decline angle, or folds into a closet because nobody ...
Compare your one-rep max against 2.5M+ competition results and find your FVCP percentile and strength tier for your bodyweight. Your Estimated One Rep Max (E1RM) is the maximum weight you could ...