What can I do to increase my strength in the second half of my overhead presses/jerks? It seems that I can get the bar from my shoulders to my forehead easily, bbut then it stalls out. Is this a bar speed issue or tricept strength issue?
Thanks
Will42
Closgrip bench incline and flat,… just up the tricep power.
its generally a tricep issue, so start there
If it’s on jerks, it’s a hip explosiveness issue (or supportive structure weakness); get them stronger or sink under the bar faster.
In presses, I’d get everything stronger, focusing on traps and triceps but not neglecting delts.
-Dan
You need to do JM’s
If it stalls at your forehead, it is not tricep weakness. It is a speed and technique issue. Or the bar is just too heavy. 
When it stalls just above your head or just before lockout, then it is primarily triceps.