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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Figueiredo, Pedro Rouard, Annie Vilas-Boas, João Paulo Fernandes, Ricardo J. |
| Description | Country affiliation: Portugal Author Affiliation: Figueiredo P ( Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Rua Dr. Plácido Costa, 91 4200-450 Porto, Portugal. spafg@vodafone.pt) |
| Abstract | The aim of this study was to investigate how upper- and lower-limb muscle fatigue evolves in a 200-m front crawl swimming race. Surface electromyography signals were collected from the flexor carpi radialis, biceps brachii, triceps brachii, pectoralis major, upper trapezius, tibialis anterior, biceps femoris, and rectus femoris muscles of 10 international-level swimmers; 4 underwater cameras were used for kinematic analysis. In addition, blood lactate was measured before and after the test using capillary blood samples. Swimming speed and stroke length decreased from the beginning to the end of the effort, whereas stroke frequency increased after an initial decrease to maintain speed. Concomitant with the decrease in speed, blood lactate increased to 11.12 (1.65) mmol·L(-1). The changes in stroke parameters were associated with an increase in integrated electromyography (20%-25%) and a decrease in spectral parameters (40%-60%) for all of the upper-limb muscles, indicating the reaching of submaximal fatigue. The fatigue process did not occur regularly during the 8 laps of the 200 m but was specific for each muscle and each subject. Lower-limb muscles did not present signals of fatigue, confirming their lower contribution to swimming propulsion. The test was conducted to individualize the training process to each muscle and each subject. |
| File Format | HTM / HTML |
| ISSN | 17155312 |
| Issue Number | 7 |
| Volume Number | 38 |
| e-ISSN | 17155320 |
| Journal | Applied Physiology, Nutrition, and Metabolism |
| Language | English |
| Publisher | Canadian Science Publishing |
| Publisher Date | 2013-07-01 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Subject Keyword | Discipline Physiology Discipline Metabolism Discipline Nutritional Sciences Discipline Sports Medicine Electromyography Muscle Fatigue Arm Humans Lower Extremity Muscle, Skeletal Swimming Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nutrition and Dietetics Physiology Endocrinology, Diabetes and Metabolism Physiology (medical) Sports Science |
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