Increase your protein intake to build some muscle, have a lot of high-calorie snacks (not junk food) like cheese sticks, milk shakes, nuts, dried fruit, yogurt and oatmeal bars.

Drink enough water ( 8 cups a day) as well as enjoy your milkshakes fresh fruit juices.

Exercise in order to gain more muscle mass. The best exercises to build muscle mass: free weight exercises like squats, deadlifts, bench presses, barbell rows, pull ups and bar dips as these exercises are great for exhausting your muscle and make it grow afterwards. 

Its highly recommended to train with qualified personal trainer in order to avoid unwanted injuries. 

There is a number of training supplements are available in the stores and online such as mass gainers, protein powders and creatine. All of them work well together with exercising.  Always eat straight after your gym session and never go hungry. 

I know this program helped a lot of people and hopefully will help you to become a better, heavier, healthier, happier you.  For more information please click here