But the arrival of the dockless bike-share model was received mostly with praise and excitement in a city that has embraced biking as a mode of transportation. Some biking aficionados said they hope the companies will indeed bring more bikes to underserved communities of the District, including the Northeast and Southeast quadrants.
It sounds super-gross but please try to imagine it: Red muscles, pink muscles, and white muscles. The red muscles are red because they contain lots of myoglobin: a protein that binds iron and oxygen. Your blood has a similar protein called hemoglobin which binds iron and oxygen.
White muscle fibers have earned the name âfast twitchâ because they contract in .01 seconds or less. Their contractions are fueled by oxygen, which contributes to the white color. Elite sprinters may have up to 80% more white muscle fibers than red since their performance relies on this type of tissue.White muscle fibers fatigue at a much faster rate than their red counterparts because of a buildup of lactic acid, so they are only good for short bursts of speed.lite sprinters may have up to 80% more white muscle fibers than red since their performance relies on this type of tissue. White muscle fibers fatigue at a much faster rate than their red counterparts because of a buildup of lactic acid, so they are only good for short bursts of speed.