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Resistance Training
 Resistance training is designed to improve either muscle strength or
size. The muscle cells are purposely damaged through a process of
overloading. The body reacts instinctively to repair the damaged cells
so they can cope with any future overload, increasing their size and
strength in the process.
The muscles themselves do not actually increase in number, as some might
think: the human body has a genetically defined number of muscle cells.
Muscular fitness is a combination of strength, endurance and
flexibility. Resistance training occurs over a short time frame and does
not necessarily improve endurance capacity or for that matter
flexibility. There may even be a decrease in endurance capacity because
as the muscle cells grow the fluid between the cells, essential to
oxygen transportation, is reduced.
Therefore depending on your exercise objective training needs to be
specific.
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