Wondering how to gain muscle? Here, experts explain how to gain muscle both in the gym and outside of it. Read for the workout, diet, and recovery tips you need to know for how to build muscle.

tone those arms :) It is very common to have flabby arms as the upper back part of your arm is your triceps and is responsible for your ¾ of your arm. This is why even if you have nice toned biceps lagging tricep muscles can be...