You should exercise if you would like to strength your muscle .To accelerate body building you should eat foods and supplements. There are a lot of  supplements (body building products) that help your body recover from exercise faster, so that it could improving its strength. 

Muscle Milk
Muscle Milk is full of vitamins, minerals, whey proteins and healthy nutrients. Muscle Milk is designed to help the body recover from exercise faster, burn fat and build muscle it is an ideal product for building strength and efficiently build muscles. 

Whey Protein
Whey protein is a mixture of globular proteins isolated from whey, the liquid material created as a by-product of cheese production. The effects of whey protein on human health are of great interest and are currently being investigated as a way of reducing disease risk, as well as a possible supplementary treatment for several diseases. Whey protein is commonly marketed and ingested as a dietary supplement, and various health claims have been attributed to it in the alternative medicine community.

Muscles need protein to recover from exercise and build up, so adding whey protein supplements helps the body with strengthening.

Glutamine Products
Glutamine is synthesized by the enzyme glutamine synthetase from glutamate and ammonia. The most relevant glutamine-producing tissue is the muscle mass, accounting for about 90% of all glutamine synthesized. Glutamine is important to muscle building because muscles use it to recover after exercise. Glutamine also prevents muscle wasting, which occurs when your exercise routine is halted

Creatine Products
Creatine has become increasingly commonly used by body builders to improve their ability to build muscle tissue. By allowing body builders to perform more work as a result of additional energy, increased protein synthesis is stimulated.
Creatine is used by the body to increase power. As a result of creatine the body is able to endure more exercise repetitions. The  best creatine products are products with dextrose, amino acids and other nutrients. 

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