Chinese Journal of Physiology

ORIGINAL ARTICLE
Year
: 2020  |  Volume : 63  |  Issue : 1  |  Page : 15--20

Physiological stress against simulated 200-m and 500-m sprints in world-class boat paddlers


Nutcharee Senakham1, Sirichet Punthipayanon1, Tanormsak Senakham1, Promjit Sriyabhaya2, Sonthaya Sriramatr1, Chia-Hua Kuo3 
1 Department of Sports Science, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
2 Department of Pathology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
3 Institute of Sports Sciences, Laboratory of Exercise Biochemistry, University of Taipei, Taipei, Taiwan

Correspondence Address:
Dr. Chia-Hua Kuo
Laboratory of Exercise Biochemistry, University of Taipei, Taipei
Taiwan

To characterize physiological stress response against simulated short-distance sprints among world-class paddlers. Thirteen dragon boat gold medalists performed 200-m and 500-m simulated race trials on a kayak ergometer in a randomized, counter-balanced, crossover fashion. During the 200-m and 500-m sprints, oxygen consumption (VO2) increased from 8.7 to 31.2 ml/kg/min and from 8.0 to 32.7 ml/kg/min within 60 s, respectively. A plateau of 35 ml/kg/min below maximal VO2(VO2max) (39.7 ± 6.3 ml/kg/min) was reached at 75 s during the 500-m sprint. Respiratory exchange ratio dropped from 1.21 ± 0.16 to 1.07 ± 0.12 and 1.28 ± 0.13 to 1.06 ± 0.16 at 45 s, and resurged to 1.17 and 1.28 at the end of 200-m and 500-m sprints with lactate concentration reached 13 ± 2 and 15 ± 2 mM. Aerobic energy contribution to paddling power increases from ~10% for the first 15 s to ~80% for the last 15 s during the 500-m trial. Postexercise plasma thiobarbituric acid reactive substances increased by 376% and 543% above baseline after 200-m and 500-m trials (P < 0.001, between trials), respectively, followed by quick returns to baseline in 30 min (P < 0.001). Increased plasma creatine kinase (+48%) was observed only after the 500-m trial (P < 0.001, between trials), not 200-m trial. Our data suggest that muscle damage occurred only when maximal sprinting exceeding 2 min, highlighting an importance of volume than intensity on exercise-induced muscle damage.


How to cite this article:
Senakham N, Punthipayanon S, Senakham T, Sriyabhaya P, Sriramatr S, Kuo CH. Physiological stress against simulated 200-m and 500-m sprints in world-class boat paddlers.Chin J Physiol 2020;63:15-20


How to cite this URL:
Senakham N, Punthipayanon S, Senakham T, Sriyabhaya P, Sriramatr S, Kuo CH. Physiological stress against simulated 200-m and 500-m sprints in world-class boat paddlers. Chin J Physiol [serial online] 2020 [cited 2020 Feb 26 ];63:15-20
Available from: http://www.cjphysiology.org/article.asp?issn=0304-4920;year=2020;volume=63;issue=1;spage=15;epage=20;aulast=Senakham;type=0