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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2015 September;174(9):405-14

Copyright © 2015 EDIZIONI MINERVA MEDICA

lingua: Inglese

Impact of lactate threshold and floor exercises load on blood lactate and NH3 of gymnasts

Hsiao C.-H. 1, Weng S.-H. 2, Jang J.-T. 3

1 Graduate Institute of Athletics and Coaching Science, National Taiwan Sport University, Taoyuan City, Taiwan;
2 Graduate Institute of Sports Training, University of Taipei, Taiwan;
3 Graduate Institute of Athletics and Coaching Science, National Taiwan Sport University, Taoyuan City, Taiwan


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AIM: This study aims to explore the impact of floor exercise load and lactate threshold (2-4 mmol/l) ability on gymnasts’ BL and NH3.
METHODS: The subjects of this study were four college Group A gymnasts. This study conducted lactate threshold (2-4 mmol/l) tests and two sets of floor exercise tests of the four subjects on different days.
RESULTS: According to the findings of this study, the aerobic threshold (2 mmol/l) and anaerobic threshold (4 mmol/l) average speeds of the four subjects were 2.3±0.4 m/s and 3.3±0.4 m/s, respectively. After the end of the first and second sets of floor exercises, the lactate value significantly increased. Fifteen minutes after the end of the second set of floor exercises, the lactate value significantly decreased. Regarding analysis of NH3 concentration, before testing the average concentration of NH3 is 54±13 μmol/l, and NH3max significantly increased after the end of testing. After special testing, the average Lamax is 9.7±1.9 mmol/l, and the time duration of the two special tests were 64±1.8s and 63.8±2.1s, respectively.
CONCLUSION: (1) Floor exercises can generate an accumulation of NH3, in addition to BL. Hence, without good recovery between sets of floor exercises, the following items will be affected by accumulated fatigue, forcing gymnasts to complete the operations in a state of high concentration of lactate and NH3; (2) the aerobic and anaerobic thresholds of the four subjects have not reached the standards of athletes. Therefore, ability can reflect the maximum lactate accumulation as well as the ability to remove lactate.

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