Blood lactate and ventilatory thresholds in wheelchair athletes with tetraplegia and paraplegia
Abstract:
Purpose:
The purpose of this study was to analyse the influence of spinal cord injury level on blood lactate (BLa) and ventilatory thresholds.
Methods:
Ten athletes with tetraplegia (TETRA) and nine athletes with paraplegia (PARA) performed a graded wheelchair propulsion treadmill exercise step test to exhaustion. The aerobic and anaerobic BLa thresholds, the ventilatory threshold and the respiratory compensation point (RCP) were determined.
Results:
The BLa thresholds were determined in 34 of 38 cases, ventilatory thresholds and RCPs in 31 of 38 cases. The anaerobic BLa threshold (76 ± 7 %) and the RCP (77 ± 8 %) did not differ significantly from each other (P = 0.92), with a coefficient of variation of 4.8 ± 3.4 % between thresholds. All other thresholds differed significantly from each other (P < 0.05). Thresholds expressed as the percentage of peak oxygen uptake did not differ between TETRA and PARA (P > 0.05) despite altered breathing in TETRA, which included a higher ventilatory equivalent for oxygen and a lower tidal volume.
Conclusion:
Measuring BLa leads to a higher threshold determination rate compared with ventilatory data and the anaerobic BLa threshold can be used to predict the RCP. The altered breathing in TETRA does not seem to have a pronounced effect on the ventilatory threshold or the RCP.
© Copyright 2014 European Journal of Applied Physiology. Springer. Kaikki oikeudet pidätetään.
Aiheet: | vammaisurheilu pyörätuoliurheilu urheilufysiologia ventilaatiokynnys aerobinen-anaerobinen kynnys selkäranka vahinko |
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Aihealueet: | vammaisurheilu biologiset ja lääketieteelliset tieteet |
Tagging: | Tetraplegie Paraplegie |
DOI: | 10.1007/s00421-014-2886-x |
Julkaisussa: | European Journal of Applied Physiology |
Julkaistu: |
2014
|
Vuosikerta: | 114 |
Numero: | 8 |
Sivuja: | 1635-1643 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |