Originally Posted by JDK
Fist in gloves?
Check out Jones Jr. shadow boxing. His fists are never fully gripped. Now when in glove, your fist should be tighter, but never a full fist. Make sure you're wrapping your hands well though.
The punch should be coming from technique. Making a tight fist flexes your forearm down to your wrist too much that you lose focus where the power should really be coming from.
This is from a boxer style. If you're the Margarito type of fighter, then maybe someone else has better advice.
Are there any benefits to shadowboxing on beat with the music? Does it help with rhythm or something? I find myself doing this sometimes unintentionally at the gym and wondered if it's a common practice.