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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nigg, Benno M. Dunn, Jeff F. Coza, Aurel |
| Description | Country affiliation: Canada Author Affiliation: Coza A ( Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada. acoza@kin.ucalgary.ca) |
| Abstract | PURPOSE: Whole-body vibrations are known to affect muscle activity and tissue oxygenation, but some energetic aspects are still poorly understood. This study investigates the effects of whole-body vibration on gastrocnemius muscle oxygen utilization rate and tissue oxygenation dynamics during exercise. METHODS: The effects of vibration on gastrocnemius medialis muscle oxygenation were investigated during a dynamic exercise on a sample of 16 active male subjects (age = 26.3 ± 5.1 yr, mass = 71.2 ± 4.8 kg (mean ± SD)). Both arterially occluded (AO) and nonoccluded (N/O) conditions were investigated. Tissue oxygenation was monitored with a near-infrared spectrometer. Oxygen utilization rate and tissue oxygenation recovery were computed as the slopes of the regression line of the oxygenation decay and recovery, respectively. A fast Fourier transform (FFT) was used to determine the frequency spectrum of the oxygen saturation data. EMG activity was monitored using bipolar EMG electrodes. A windowed root mean square analysis was used to monitor the amplitude of the EMG signal. RESULTS: A statistically significant increase of 15% (P < 0.05) in oxygen utilization rate was found for the vibration condition in the AO leg but not in the N/O leg. The oxygenation recovery rate for the vibration condition was 34% higher (P < 0.05) than that for the control condition. A low-frequency periodic oscillation (T ≈ 10 s) in the tissue oxygenation data was determined from the FFT spectrum. A statistically significant decrease in the oscillation frequency was noticed for the vibration condition compared with the control. CONCLUSIONS: Vibrations increased the oxygen utilization rate during a dynamic exercise. The oxygenation recovery rate increased with vibrations. The low-frequency oscillation of the oxygenation was attributed to the periodic changes in tissue blood flow, and this seems to be influenced by vibrations. |
| ISSN | 01959131 |
| Issue Number | 3 |
| Volume Number | 43 |
| e-ISSN | 15300315 |
| Journal | Medicine & Science in Sports & Exercise |
| Language | English |
| Publisher | Lippincott Williams & Wilkins (on behalf of the American College of Sports Medicine) |
| Publisher Date | 2011-03-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Exercise Muscle, Skeletal Metabolism Oxygen Consumption Oxygen Vibration Adult Electromyography Humans Male Blood Young Adult Journal Article Randomized Controlled Trial Research Support, Non-u.s. Gov't Discipline Sports Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science |
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