Exercise physiology loss of integrity to the blood brain barrier. Hyperthermia also can lower cerebral blood flow, and raise brain temperature. Researchers once attributed fatigue to a build-up of lactic acid in muscles. However, this is no longer believed. Rather, lactate may stop muscle fatigue by keeping muscles fully responding to nerve signals. The available oxygen and energy supply, and disturbances of muscle ion homeostasis are the main factor determining exercise performance, at least during brief very intense exercise. Each muscle contraction involves an action potential that activates voltage sensors, and so releases Ca ions from the muscle fibre’s sarcoplasmic reticulum. The
Form (exercise) Form (exercise) Form is a specific way of performing a movement, often a strength training exercise, to avoid injury, prevent cheating and increase strength. Exercises or drills in sport have a recognized way of performing the movements that have two purposes: By using proper or 'good and' form, the risk of injury is lowered. A lack of proper form commonly results in injury or a lack of effect from the exercise being performed Good form ensures that the movement only uses the main muscles, and avoids recruiting secondary muscles. As a muscle fatigues, the body attempts to compensate by recruiting