In relativity physics, the shortening of an object along the direction of its motion relative to an observer. Dimensions in other directions are not contracted. This concept was proposed by the Irish physicist George F. FitzGerald (1851–1901) in 1889 and later independently developed by Hendrik Antoon Lorentz. Significant at speeds approaching that of light, the contraction results from the properties of space and time, not from compression, cooling, or any similar physical disturbance. Seealso time dilation.
Learn more about Lorentz-FitzGerald contraction with a free trial on Britannica.com.
Contraction frequency modulates muscle fatigue and the rate of myoglobin desaturation during incremental contractions in humans.(Clinical report)
Oct 01, 2008; Introduction Skeletal muscle fatigue, defined as a drop in force-generating capacity in response to contractions, will...