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| Abortion doping ： ウィキペディア英語版 |
Abortion doping
Abortion doping refers to the rumoured practice of purposefully inducing pregnancy for athletic performance-enhancing benefits, then aborting the unwanted pregnancy.
==Physical benefits==
Hormonal and other changes in pregnancy affect physical performance. In the first three months it is known that a woman’s body produces a natural surplus of red blood cells, which are well supplied with oxygen-carrying haemoglobin, in order to support the growing fetus.〔 A study of athletes before and after pregnancy by Professor James Pivarnik at the Human Energy Research laboratory in Michigan State University has found there is a 60 per cent increase in blood volume and that this could improve the body’s ability to carry oxygen to muscles by up to 30 per cent.〔 This would have obvious positive effects on aerobic capacity. Other potential advantages are obtained from the surge in hormones that pregnancy induces, predominantly progesterone and oestrogen, but also testosterone, which could increase muscle strength. Increases in hormones like relaxin, which loosens the hip joints to prepare for childbirth, may have a performance enhancing effect on joint mobility.
Several world records have been set by female athletes shortly after giving birth to their first child.〔 This is accepted as a natural and unintended event.〔Paulev, Poul-Erik M.D., D.Sci. Medical Physiology And Pathophysiology (1999-2000) Chapter 18 ()〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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