Physiological responses during simulated 16 km recumbent handcycling time trial and determinants of performance in trained handcyclists. - OpacWWW

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Tytuł:: Physiological responses during simulated 16 km recumbent handcycling time trial and determinants of performance in trained handcyclists.
Autorzy:: Stone B; Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences, Loughborough University, NCSEM 1.26, Loughborough University Campus, Loughborough, LE11 3TU, UK.
Mason BS; Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences, Loughborough University, NCSEM 1.26, Loughborough University Campus, Loughborough, LE11 3TU, UK.
Stephenson BT; Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences, Loughborough University, NCSEM 1.26, Loughborough University Campus, Loughborough, LE11 3TU, UK.; English Institute of Sport, Performance Centre, Loughborough University, Loughborough, UK.
Goosey-Tolfrey VL; Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences, Loughborough University, NCSEM 1.26, Loughborough University Campus, Loughborough, LE11 3TU, UK. .
Źródło:: European journal of applied physiology [Eur J Appl Physiol] 2020 Jul; Vol. 120 (7), pp. 1621-1628. Date of Electronic Publication: 2020 May 20.
Typ publikacji:: Journal Article
Język:: English
Imprint Name(s):: Original Publication: Berlin ; New York : Springer-Verlag, c2000-
MeSH Terms:: Bicycling/*physiology
Exercise/*physiology
Heart Rate/*physiology
Oxygen Consumption/*physiology
Adult ; Exercise Test ; Humans ; Lactic Acid/metabolism ; Male ; Middle Aged ; Standing Position
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Grant Information:: EP/M507489/1 Engineering and Physical Sciences Research Council
Contributed Indexing:: Keywords: Disability sport; Endurance performance; Lactate threshold; Paralympic; Spinal cord injury
Substance Nomenclature:: 33X04XA5AT (Lactic Acid)
Entry Date(s):: Date Created: 20200522 Date Completed: 20210503 Latest Revision: 20211007
Update Code:: 20240105
PubMed Central ID:: PMC7295712
DOI:: 10.1007/s00421-020-04390-w
PMID:: 32435985
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Purpose: To characterise the physiological profiles of trained handcyclists, during recumbent handcycling, to describe the physiological responses during a 16 km time trial (TT) and to identify the determinants of this TT performance.
Methods: Eleven male handcyclists performed a sub-maximal and maximal incremental exercise test in their recumbent handbike, attached to a Cyclus II ergometer. A physiological profile, including peak aerobic power output (PO Peak ), peak rate of oxygen uptake ([Formula: see text]O 2Peak ), aerobic lactate threshold (AeLT) and PO at 4 mmol L -1 (PO 4 ), were determined. Participants also completed a 16 km simulated TT using the same experimental set-up. Determinants of TT performance were identified using stepwise multiple linear regression analysis.
Results: Mean values of PO Peak = 252 ± 9 W, [Formula: see text]O 2Peak = 3.30 ± 0.36 L min -1 (47.0 ± 6.8 mL kg -1 min -1 ), AeLT = 87 ± 13 W and PO 4 = 154 ± 14 W were recorded. The TT was completed in 29:21 ± 0:59 min:s at an intensity equivalent to 69 ± 4% PO Peak and 87 ± 5% [Formula: see text]O 2Peak . PO Peak (r = - 0.77, P = 0.006), PO 4 (r = - 0.77, P = 0.006) and AeLT (r = - 0.68, P = 0.022) were significantly correlated with TT performance. PO 4 and PO Peak were identified as the best predictors of TT performance (r = 0.89, P < 0.001).
Conclusion: PO Peak , PO 4 and AeLT are important physiological TT performance determinants in trained handcyclists, differentiating between superior and inferior performance, whereas [Formula: see text]O 2peak was not. The TT took place at an intensity corresponding to 69% PO Peak and 87% [Formula: see text]O 2peak .

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Physiological responses during simulated 16 km recumbent handcycling time trial and determinants of performance in trained handcyclists.