There are about 650 muscles in our body, and each one helps us in producing a movement. Physical exercise, training particularly resistance or weight training affects our muscular system to a great extent. They are as follow.
(I) Hypertrophy of the muscle: Due to resistance training the size of muscle fibres increases. The total amount of protein increases which is essential for muscle growth.
(II) Biochemical changes in muscles:
(i) Aerobic Changes: Myobin content increases. Oxydation of carbohydrates and flats increases. Amount of mitochondria increases thus more muscular force is produced.
(ii) Anaerobic changes: ATP + PC system capacity increases, thereby more energy is released. Glycolytic also increases as result of training.
(III) Body composition changes: there can be significant losses of relative and absolute body . free weight or muscle mass increases significantly. After training flexibility increases which plays an important role in physical activities to endurance the performance and prevent muscular injury.
