title: Effects of prostaglandins and COX-inhibiting drugs on skeletal muscle adaptations to exercise.
abstract: It has been ∼40 yr since the discovery that PGs are produced by exercising skeletal muscle and since the discovery that inhibition of PG synthesis is the mechanism of action of what are now known as cyclooxygenase (COX)-inhibiting drugs. Since that time, it has been established that PGs are made during and after aerobic and resistance exercise and have a potent paracrine and autocrine effect on muscle metabolism. Consequently, it has also been determined that orally consumed doses of COX inhibitors can profoundly influence muscle PG synthesis, muscle protein metabolism, and numerous other cellular processes that regulate muscle adaptations to exercise loading. Although data from acute human exercise studies, as well as animal and cell-culture data, would predict that regular consumption of a COX inhibitor during exercise training would dampen the typical muscle adaptations, the chronic data do not support this conjecture. From the studies in young and older individuals, lasting from 1.5 to 4 mo, no interfering effects of COX inhibitors on muscle adaptations to resistance-exercise training have been noted. In fact, in older individuals, a substantial enhancement of muscle mass and strength has been observed. The collective findings of the PG/COX-pathway regulation of skeletal muscle responses and adaptations to exercise are compelling. Considering the discoveries in other areas of COX regulation of health and disease, there is certainly an interesting future of investigation in this re-emerging area, especially as it pertains to older individuals and the condition of sarcopenia, as well as exercise training and performance of individuals of all ages.
authors.affiliation: Human Performance Laboratory, Ball State University, Muncie, Indiana.
authors.forename: Todd A
authors.initials: TA
authors.lastname: Trappe
authors.forename: Sophia Z
authors.initials: SZ
authors.lastname: Liu
mesh_terms: D000222:Adaptation, Physiological / Q000187:drug effects; D000818:Animals; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology*; D015444:Exercise / Q000502:physiology*; D006801:Humans; D018482:Muscle, Skeletal / Q000187:drug effects* / Q000502:physiology*; D011451:Prostaglandin-Endoperoxide Synthases / Q000502:physiology; D011453:Prostaglandins / Q000502:physiology*; D015398:Signal Transduction / Q000187:drug effects
chemical_list: D016861:Cyclooxygenase Inhibitors; D011453:Prostaglandins; D011451:Prostaglandin-Endoperoxide Synthases
keywords: PGE2; PGF2α; acetaminophen; ibuprofen; sarcopenia
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