Ventilatory, metabolic and kinematic responses in sprint versus distance swimmers

Abstract : The aim of this study was to compare the speed, oxygen uptake (VO2 consumption), blood lactate concentration ([La]b), and stroke rate (SR) in sprint and middle-distance swimmers. Seven male elite middle-distance swimmers (performance level=89% of the world record) and seven male sprint swimmers (performance level=88% of the world record) were recruited. Ventilatory, metabolic and kinematic parameters were obtained during a 6 x 300-m incremental swimming exercise to exhaustion. VO2 kinetics were compared between groups using a 500-m interval training set (IT-500) swum at the lactate threshold (LT). Speed at VO2max was faster for the middle-distance swimmers (1.51 ± 0.02 m.s-1) than the sprinters (1.34 ± 0.07 m.s-1). Speed at LT was also faster for the middle-distance swimmers (3.1 ± 1.2 mmol.L-1; v LT = 1.46 ± 0.01 m•s-1, equivalent to 96.7 ± 0.5% of vVO2max) than the sprinters (4.5 ± 1.5 mmol.L-1; v LT = 1.22 ± 0.06 m•s-1, 91 ± 1.9% of vVO2max; P < 0.01). The middle-distance swimmers had a higher stroke rate at LT (36.7 ± 4.5 vs. 30.3 ± 0.7 s.min-1) and consumed a larger VO2max fraction (95 ± 2 vs. 84 ± 5% of VO2max; P < 0.01). A significant positive correlation was observed between ΔVE and ΔSR (r² = 0.93, P < 0.01) in the middle-distance swimmers during the IT-500, whereas a negative relationship was observed with Δstroke length (r² = 0.81, P < 0.01). The middle-distance swimmers were typically 10-15% faster at the lactate threshold and at the maximal oxygen uptake. In contrast, the blood lactate concentration was 40% higher in the sprint swimmers but the stroke rate was 15% lower at the lactate threshold.
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Submitted on : Friday, January 2, 2015 - 11:37:30 PM
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Philippe Hellard, Pierre-Marie Lepretre, Marta Avalos, Ludovic Seifert, Jean-François Toussaint, et al.. Ventilatory, metabolic and kinematic responses in sprint versus distance swimmers. XIIth International Symposium on Biomechanics and Medicine in Swimming, Apr 2014, Canberra, France. ⟨hal-01099378⟩



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