What is the best exercise to do for firming the backs of your upper arms?!
Question:
What is the best exercise to do for firming the backs of your upper arms?
Answers:
your triceps? probably using weights and lifting it behind your head up and down hold the weight in a triangle w/ both your hands and your thumbs and first finger. Just hold on to one side so it's vertical and straighten it up high and then down behind your head