How to gain muscle

Work hard: You gain muscle by subjecting your body to a load that it cannot handle, allow appropriate time and rest for your body to accomodate, and provide your body with the appropriate nutrition to support that activity. That translates into hard work in the gym while avoiding overtraining, getting enough sleep, and eating a well balanced diet. There are no safe, legal shortcuts.

Resistance training: To build mass, work the muscle group in question hard. Maximum resistance, 8-10 repetitions per set, three sets, 3-4x/week. Several different types of exercise. Creatine and an electronic muscle stimulator if okay by your physician. Eat sensibly and moderately with enough lean protein. Anabolic steroids give mass but harm you as a person.

Work muscles harder: If muscles are used repeatedly until they tire, but are not injured, then they will grow bigger and stronger! if one does not eat or drink more calories than he uses during exercise, then his body will burn up fat for fuel. However, if he drinks a big orange juice (about 300 calories) while exercising, and exercises away only 200 calories, he will still get chubbier even though he is exercising.

Doing exercise: The best way to get muscles are doing every day exercises, eating plenty of protein with creatine and supplement of anabolic steroids and DHEA,

The basics: You will likely have to eat a little bit more than you are now, and most of the extra calories should be from protein. In addition to that, you will need to start some sort of resistance training. Pick something that you enjoy. Hope this helps!

Eat & exercise.: You need to focus your exercise regimen more on weight training than aerobics. Work out with heavier weights and fewer reps per set - around four reps per set. Keep good form with your exercises to minimize chance of injury. As well, make sure you eats lots of food, and focus on complex carbohydrates and lean protein sources.