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
Exercise and music various muscles. Thomas Hans Fritz, a researcher at the Max Planck Institute who led the study said, “Participants could express themselves on the machines by, for instance, modulating rhythms and creating melodies.” Throughout each workout, the researchers monitored the force their volunteers generated while using the machines, as well as whether the weight lifters’ movements tended to stutter or flow and how much oxygen the volunteers consumed, a reliable measure of physical effort. Afterward, the scientists asked the volunteers to rate the tolerability or unpleasantness of the session, on a scale from 1 to 20. Exercise and music The interplay