If you want defined upper arms, you should definitely train your triceps in addition to your biceps and shoulder muscles. Tricep dips are an excellent exercise to strengthen and shape the arm muscles, ...

Ditch crunches. Try 6 standing moves that burn more calories, tighten your core, and slim a stubborn belly after 40.

The main muscles recruited when performing a pullup are the back (specifically the rhomboids and lats ), arm muscles including the posterior deltoids and biceps, and the core. Here are some of the ...