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Full-Text Articles in Life Sciences
Early And Late Rapid Torque Characteristics And Select Physiological Correlates In Middle-Aged And Older Males, Alex A. Olmos, Matthew T. Stratton, Phuong L. Ha, Benjamin E. Dalton, Trisha Vandusseldorp, Gerald Mangine, Yuri Feito, Micah J. Poisal, Joshua A. Jones, Tyler M. Smith, Garrett Hester
Early And Late Rapid Torque Characteristics And Select Physiological Correlates In Middle-Aged And Older Males, Alex A. Olmos, Matthew T. Stratton, Phuong L. Ha, Benjamin E. Dalton, Trisha Vandusseldorp, Gerald Mangine, Yuri Feito, Micah J. Poisal, Joshua A. Jones, Tyler M. Smith, Garrett Hester
Faculty and Research Publications
Purpose
The purpose of this study was to compare early and late rapid torque parameters of the plantar flexors (PFs) in middle-aged (MM) and older (OM) males, and determine the effect of normalization to peak torque (PT) and muscle cross-sectional area (CSA).
Methods
Twenty-nine healthy, MM (n = 14; 45 ± 2 yrs) and OM (n = 15; 65 ± 3 yrs) performed rapid, maximal isometric contractions of the PFs. PT, as well as rate of torque development and impulse during the early (0–50 ms; RTD0-50, IMP0-50) and late (100–200 ms; RTD100-200, IMP100-200 …
Bioenergetic Mechanisms Of Age-Related Differences In Muscle Fatigue, Liam F. Fitzgerald
Bioenergetic Mechanisms Of Age-Related Differences In Muscle Fatigue, Liam F. Fitzgerald
Doctoral Dissertations
Muscle fatigue is defined as the reduced capacity to produce torque or power in response to contractile activity. Previous work has observed greater fatigue in older than young adults in response to high-velocity contractions, but similar fatigue with age in response to moderate-velocity contractions. The mechanisms for these age-related differences is not clear. One potential explanation is a greater accumulation of putative agents of fatigue (e.g., Pi, H2PO4-, and H+) in older than young muscle during high- but not moderate-velocity contractions. Older muscle may accumulate these metabolites to greater extent because of deficits …