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
This Is an Exercise This Is an Exercise This Is an Exercise is an album by experimental electropop artist Anna Oxygen, released in 2006 on Kill Rock Stars. Allmusic described the album as "just as fascinating as it is chilly and alienating. In her songs, Oxygen explores some of the same issues of authenticity, creation, and consumption that Tracy + the Plastics do, but with a sci-fi/fantasy bent." Oxygen composed the album herself, also handling piano, primary vocals, and sequencing. It also featured Melissa Collins on cello, Andy Gertz on accordion, and guest vocalists Kitty Jenson, Mirah Yom Tov Zeitlyn & Ginger Takahashi. Portland