Too many people seem to finish a set when they reach a certain number of reps, but body will only show significant change if you ask it to do something extra. Only by passing through break-over point of momentary muscle failure will you stimulate muscle to grow.

Anyone starting out on their bodybuilding career should not attempt this method of training as it could lead to serious injury. Spend several months perfecting exercise form and conditioning body to lift heavier weights before gradually introducing training to failure.

2. It helps body to retain nitrogen that is essential to muscle building process.

3. Its vasodilating abilities support muscle growth.

4. It enhances protein synthesis.

5. It helps to boost immune system allowing harder training and minimizing minor illnesses that come from overtraining.

With any amino acid supplement overdosing can lead to weakness and nausea so care should be taken in applying small doses and increasing them gradually until an optimum level is reached. Bear in mind that many protein powders and other supplements are fortified with amino acids so check labels carefully. The manufacturer's instructions should be followed in all instances.