The 30-year-old Liverpool-born fighter took the best of the now four-weight division champion's best power shots ... a suspected detached bicep. DAZN cameras picked up images of him rubbing ...

Stocktrek Images//Getty Images But if you really ... It generates about 50 percent more power than the biceps, and targeting it in your workouts will not only allow you to curl heavier weights ...

Repeat 10 times. Boxing can help you become more confident in your upper-body strength while increasing your power. Warm up with jabs, and then focus on uppercuts and hooks while engaging your biceps.

The 30-year-old Liverpool-born fighter took the best of the now four-weight division champion's best power shots ... a suspected detached bicep. DAZN cameras picked up images of him rubbing ...