I like using a heavy bag as part of general conditioning for pitching.
It is a good cardio workout without doing something that can be a negative like distance running.
Need to make sure the wrists and hands are properly wrapped and I use boxing gloves as opposed to MMA gloves for extra protection. A guy needs to make sure he is throwing a punch with proper technique as well.
I feel this assists with developing a good core rotation (as the punch is initiated with the hip and rotates out through the arm), endurance and to a limited degree upper body power.
Any thoughts on heavy bag work?
Also, any tips besides lateral bounds or Heidens for trying to develop lateral power?
Thanks.