Shot put I think is helpful for many boxing and not only boxing punches so I agree with Sinister about it.
Weight lifting, I there don't mean pure boxing, might help a lot, I think.
Cos, in ideal ( rare in life cos guys aren't static dolls ) sceanario proper uppercut is delivered mainly with legs and all other body, hand is only tool like hammer in hand.
Weight lifting is done primary with…. the legs. Beginning is in foot, ankles, knees, hips and spine, not hand. If one is with midlle or low stance, rapid, explosive extension in foots, ankles, knees, hips joints and spine delivers " height reach " from your not full height to full height and hand then even with short distance to travel itself, might deliver chin movement to longer distance than there just is place for hand's movement distance.
Cos lifting mechanics, there are comfort with high work load and due to movements under resistance experience there might be easy also to deliver elbow something like from 6 to 12 clock for striking in arts,where this is allowed.

Weight lifting, I there don't mean pure boxing, might help a lot, I think.
Cos, in ideal ( rare in life cos guys aren't static dolls ) sceanario proper uppercut is delivered mainly with legs and all other body, hand is only tool like hammer in hand.
Weight lifting is done primary with…. the legs. Beginning is in foot, ankles, knees, hips and spine, not hand. If one is with midlle or low stance, rapid, explosive extension in foots, ankles, knees, hips joints and spine delivers " height reach " from your not full height to full height and hand then even with short distance to travel itself, might deliver chin movement to longer distance than there just is place for hand's movement distance.
Cos lifting mechanics, there are comfort with high work load and due to movements under resistance experience there might be easy also to deliver elbow something like from 6 to 12 clock for striking in arts,where this is allowed.