Many people wonder why one can build strength and mucles faster than another doing the same exercises and sticking to the same training program. Most of them start thinking that they are doing something wrong because they haven't managed to achieve the same results. However there are factors which influence on the ability of every individual to achieve strength and gain muscle mass. In most cases it is almost impossible to control over most of them.  Type of Muscle Fiber
One of the factors which impacts on your strength and muscle building greatly is type of muscle fiber. There are two types of muscle fiber: "slow twitch" and "fast twitch." Slow twitch fibers are more beneficial fo aerobic activities. They involve less power and produce these small levels of force for long periods of time, they are suitale for performing endurance activities. Fast twitch fibers are better for anaerobic activities. Producing high levels of force for shorter periods they bring great results from power activities like weightlifting.
In most cases men and women have an equal combination of both these fibers. But some individuals can inherit a high percentage of slow twitch fibers which make their endurance workouts more effective (long istance runners). Most world class marathon runners genetically have a high amount of slow twitch fibers while sprinters or football players have more fast twitch muscle fibers. In spite of that both these muscle fiber types have a positive influence on bodybuilding exercise, the fast twitch type provies greater results and increase in muscle mass an strength. This type of muscle fiber helps you obtain bigger and faster results from your strength training routine. Age
Another factor which can't definitely be controlled by you is age. It has been proved that people regardless of their age can increase their muscle mass and strength due to following a safe stength training program. It should be mentioned that people aged 10-20 years have more opportunities to gain greater muscles and strength faster. When you reach normal physical maturity you won't be able to build muscles as quickly as before. Gender
Your gender doesn't impact on the quality of the muscle however it influenes their quantity. Men and women have the same muscle tissues however men have more muscle tissues than women. The reason is that muscle size is increased due to the testosterone (the male sex hormone). The larger the muscles, the stronger the person.
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