title: Aging has greater impact on anaerobic versus aerobic power in trained masters athletes.
abstract: This study measured the relative rates of change of the three human energy systems across a 30-year age range. A cross-section of highly trained masters cyclists (n = 156 males and 17 females; 35-64 years) were tested for maximal cycling performance. There were 50 (29%) track sprint cyclists and the remaining (71%) were predominantly road cycling specialists. A 10 s peak power test measured anaerobic power, a 30 s test measured anaerobic capacity, and a progressive test to volitional fatigue was used to determine peak aerobic power. Participants' exercise patterns were recorded using a physical activity recall questionnaire. Linear regression showed significant changes in anaerobic performance with aging. Peak anaerobic power (W · kg⁻¹) declined at a rate (mean ± SEE) of 8.1 ± 4.1% per decade (P < 0.0001) and anaerobic capacity (kJ · kg⁻¹) declined at 8.0 ± 3.3% per decade (P < 0.0001). Peak aerobic power [W · kg⁻¹] did not change significantly with age [-1.8 ± 1.5% per decade (P = 0.218)]. This cross-sectional study showed performance of the two anaerobic energy systems declined significantly across the age spectrum with no change in aerobic capacity.
authors.affiliation: School of Health Sciences, University of South Australia, Adelaide 5000, Australia.
authors.forename: Debra Nicole
authors.initials: DN
authors.lastname: Gent
authors.forename: Kevin
authors.initials: K
authors.lastname: Norton
mesh_terms: D000328:Adult; D000367:Age Factors; D000375:Aging; D015308:Anaerobic Threshold; D056352:Athletes; D054874:Athletic Performance; D001642:Bicycling; D003430:Cross-Sectional Studies; D015444:Exercise; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D010807:Physical Endurance; D005082:Physical Exertion; D011795:Surveys and Questionnaires