Split knuckle in round four. Wraps full of sweat. Shins that quit.

Wet skin, hard bag, same spot every round.

A dry knuckle under a good wrap takes a lot of punishment. A wet one does not. Hands sweat into the wrap, the skin over the knuckle softens, and the wrap shears across it on every punch until it tears. Heavy bag work is the worst, because the bag does not move and the same two knuckles land every time.

Muay Thai adds shins and the clinch: skin on the shin that bruises and splits, forearms that lock up from checking kicks, neck and shoulders from the clinch. The routine is the same one we give grapplers. Keep the hands dry under the wraps, close what opens the same night, keep the rest hydrated so it bends. Rhino's fight kit was built with Chey Bowers, who strikes and grapples for a living.