Answer by  
                                                                                          jmansfie (282)
                                                            
                          
                          
                                                          Working out is the best way to increase muscle mass. It's important to rotate muscle groups so that you don't overwork a particular muscle/group, though. Muscle mass gains can be increased rapidly through the consumption of protein, preferably whey protein. It is recommended that you take 1g per pound of non-fat body weight.