Can estrogens diminish exercise induced muscle damage?
Estrogens are female sex hormones that may also protect against peroxidative damage of membrane lipids and low density lipoproteins (LDL). Studies have reported that female rats have greater protection against free radical induced lipid peroxidation and muscle damage consequent to exercise than do male rats. It has been suggested that the lower susceptibility to exercise induced oxidative stress and muscle membrane disruption of female rats may be due primarily to the antioxidant and membrane stabilizing properties of estrogens. Studies on humans have indicated that the lower incidence of atherosclerosis seen in premenopausal females in comparison to males is due at least in part to the ability of estrogens to diminish LDL peroxidation. However, there is little evidence as to the potential of estrogens to protect human females from free radical induced peroxidation and muscle damage due to exercise. This paper reviews the evidence for membrane stabilization potential of estrogens and their possible mechanisms, and speculates as to the potential significance of this for human exercise.
Tiidus
P M
PM
Department of Physical Education, Wilfrid Laurier University, Waterloo, Ontario.
D000818:Animals; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology; D002462:Cell Membrane / Q000378:metabolism / Q000502:physiology; D004967:Estrogens / Q000502:physiology*; D005260:Female; D005609:Free Radicals; D006801:Humans; D015227:Lipid Peroxidation; D008077:Lipoproteins, LDL / Q000378:metabolism / Q000502:physiology; D008297:Male; D008563:Membrane Lipids / Q000378:metabolism / Q000502:physiology; D009132:Muscles / Q000378:metabolism / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D051381:Rats; D012727:Sex Characteristics
D000975:Antioxidants; D004967:Estrogens; D005609:Free Radicals; D008077:Lipoproteins, LDL; D008563:Membrane Lipids