The starting point for distinctive muscles and fitness routine for many is to ask the query of “how much should I do”? And obviously the following question that comes to mind is “how many”? This brings us to the obvious question, Is There A Science to Repetition ? Neurological and metabolic continuum refers to the amount of weight you pick up related to one repetition maximum and this determines how much tension the muscle is producing. Muscles exercise science demonstrate that the quantity of strain you put on your muscle is fundamental for achieving the wanted results and build strength . Studies has proven that if you do repetitions in the 1 to 5 ranges this will increase strength but will not help you in growing your muscles, on the other hand repetitions between 6 to 15 ranges will boost and aid you to grow muscles. One of the key objectives for body builders when performing muscles exercise is incredible muscle growth, but that doesn’t mean that doing low repetitions isn’t the way, muscles exercise research shows that to grow many type of muscles low repetitions exercise are more advisable. Also when performing low repetition exercises the athlete is able to lift heavier weights, which gives greater level of tension in the muscle and in turns leads to a higher growth result . This leads us to another question, which is, Should Repetition Dictate the Weight for Optimal Muscle and Fitness Exercise Routine? Results is what we do want when doing muscles exercise, and to get those results without a doubt we have to force ourselves and use maximal voluntary contractions, at least some times . It is necessary to overload the muscle in order to get it to grow, muscles which are not overloaded will not grow because they don’t have reason to do it and there is no reason for them to get bigger . So talking about results it is fair to say that while creating a muscle and fitness exercise routine you should decide the effect the training you are going to undertake should have, this in turn will determine the repetition style you will use. To grow muscles you should do more then 8 repetitions, the best number is between 8 and 12 repetitions, this will determine the weight you are going to lift , the rule of thumb is that if you can’t do 8 repetitions it means that the weight you are using is too heavy and you should cut down, on the other hand if you can easily do more then 12 repetitions it means that the weight is not enough and you should lift heavier weights. Another critical factor to take into consideration when deciding the weight you will be lifting for a specific exercise is your health conditions at any given time and how you feel, needless to say if on a particular day you are not feeling at the top you will want to choose lighter weights, it is also true that when feeling particularly well you will want to try lifting heavier weights to maximize your muscles results.