Before muscular failure

Before muscular failure 

muscles 

You are almost at the end of your series, you are left with only a few repetitions, you start to falter and it will become difficult to sustain such rapid pace at the beginning. Your energy drops sharply. A feeling of growing blight invades the muscles you are applying for. You feel powerful, but it's just a memory! Your penultimate rehearsal is even harder but you tear force tripe, ignoring the pain that tells you to stop. At the last rehearsal, due to the pain caused by lactic, your muscles are driven nerve impulses that require you to stop your acid series. Despite this and with great concentration, you get to finish the last rep of your series. Over the last rehearsals, the body recruits more fibers to rapid contraction who tire quickly: this explains why the feeling of strength and energy also disappears quickly from one repetition to another. The higher the load is heavy and more repetitions you do, the more actin and myosin are struggling to shrink under the force of weight. Within certain muscular fibers, is literally pulled actin myosin. This will damage the muscle fibers at the molecular level.

Following glycolytic ATP are produced but also molecules of lactic acid. This is what many practitioners fear of weight training, because this metabolic waste is accused of being responsible for muscle failure. It is he who causes the burn in muscles during and after an intense session. That create an acidic environment that can compel you to stop your series. This lactic acid, however, a positive side! It is he who causes the secretion of growth hormone. When the lactic acid content amounts: the secretion of growth hormone also increases. This peak lactic acid that occurs at the end of a series that tells the body it needs to secrete growth hormone (GH) intensifies lipolysis (fat burning) and starts the process of regeneration and muscle development.

About muscular failure, recent studies show that it is not only caused by the accumulation of lactic acid. As stated above, when the muscles receive the electrical signal from the brain, the cells become loaded with sodium and potassium releases. When you make additional repetitions, sodium builds up in the muscles, while the potassium level steadily decreasing. Pump sodium / potassium present on the cell membrane (cell edges) can compensate the changes by activating the exchange of electrolytes between the inside and outside cells. This pump uses energy to function: ATP. During intense exercise, modification of contraction electrolyte is such that the pump can not keep up. Consequently, muscle strength decreases, resulting in fatigue and eventually muscle failure.