Men and women exhibit a similar time to task failure for a sustained, submaximal elbow extensor contraction
| Autor: | Richard L. Hoffman, Thad E. Wilson, Douglas J. Dearth, Brian C. Clark, David W. Russ, Jonathan Umbel |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Adult
Male medicine.medical_specialty Physiology Physical Exertion Elbow Poison control Isometric exercise Electromyography Sex Factors Physical medicine and rehabilitation Isometric Contraction Physiology (medical) Internal medicine Task Performance and Analysis Heart rate medicine Humans Orthopedics and Sports Medicine Muscle Skeletal medicine.diagnostic_test Muscle fatigue business.industry Public Health Environmental and Occupational Health General Medicine medicine.anatomical_structure Muscle Fatigue Cardiology Female Silent period medicine.symptom business Muscle contraction |
| Zdroj: | European Journal of Applied Physiology. 108:1089-1098 |
| ISSN: | 1439-6327 1439-6319 |
| DOI: | 10.1007/s00421-009-1323-z |
| Popis: | Sex differences in muscle fatigue-resistance have been observed in a variety of muscles and under several conditions. This study compared the time to task failure (TTF) of a sustained isometric elbow extensor (intensity 15% of maximal strength) contraction in young men (n = 12) and women (n = 11), and examined if their neurophysiologic adjustments to fatigue differed. Motor-evoked potential amplitude (MEP), silent period duration, interference electromyogram (EMG) amplitude, maximal muscle action potential (M max), heart rate, and mean arterial pressure were measured at baseline, during the task, and during a 2-min ischemia period. Men and women did not differ in TTF (478.2 ± 31.9 vs. 500.4 ± 41.3 s; P = 0.67). We also performed an exploratory post hoc cluster analysis, and classified subjects as low (n = 15) or high endurance (n = 8) based on TTF (415.3 ± 16.0 vs. 626.7 ± 25.8 s, respectively). The high-endurance group exhibited a lower MEP and EMG at baseline (MEP 16.3 ± 4.1 vs. 37.2 ± 3.0% M max, P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink