A 7 year old thread! Dont get many of these.
First , I am not a certified trainer, I will just let you know whats been working for me. I train for one reason only: to be better than the enemy, so I will change things up about every 6 weeks, while still working on core skills: two movements that are working for me:
Standing Landmine Presses: (T-Nation has an article on landmine presses). I pick up the bar, place my hands together on the end of the bar, with the weight evenly on the palms, and then lower to the center of my chest, and then push straight up. This is done in my boxing/MT stance and IMHO, really builds the ability to get the whole body into a punch. I use enough weight that causes me to drive up with my legs. I am not a strong guy, so my weight on the end of the bar is around 180 and on good days 200 (counting bar weight). I do 40 reps, usually 6 to 8 at a time until reaching 40 . Ater this, I take some weight off and work single arm, which really brings core balance into play. I do 40 to 60 reps on each arm ( same 8 to 10 reps).I believe it has made a difference for me on the heavy bag, plus, there is no shoulder issues with me. I can feel it all over the next day, especially in the abs.
Word of caution: if you try this be careful lowering the bar back to the floor, if it gets away from you, lower back will take the strain, I lower the bar to my lower chest, top of the abs and then lower to the floor, always under control. also, watch your toes, good way to crush them.
My second choice is weighted carries or farmers walk, IMHO, a superior all body movement that builds strength and power. My two cents.