Time Limit at vV02max and V02max Slow Component in Swimming: a pilot study of University Students
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abstract
The aim oftms study was to measure in swimming-pool conditions, the time to exhaustion at the
minimum velocity that elicits maximal oxygen consumption (TLim-vV02max) and to verify the
existence of an oxygen uptake slow component (02SC) in freestyle swimming. Ten university
students performed a continuous incremental protocol for vV02max assessment. Forty-eight
hours later, they swam to exhaustion at vV02max to assess TLim-vV02max and 02SC. V02
was directly measured and swimming velocity was controlled by a visual pacer. Blood lactate
concentrations ([La-]) and heart rate (HR) values were also measured. Mean V02max for the
incremental test was 54.2±8.2 m1.kg'l.min'l, and the correspondent vV02max was 1.19±O.08
m.S,l The mean duration ofthe TLim-vV02max test was 325±76.5 s. 02SC appeared in the allout
swim at VV02max (279.0±195.2 ml.min'l) and it was found to significant1y correlate with
the TLim-vV02max (r = .74, p< .05). These results demonstrated that 02SC is observed also in
swimming-pool conditions and that TLim-vV02max values are in accordance with typical
formulations of aerobic power training sets for swimmers.
We wish to thank Prof Dr. José Soares, from the Laboratory of Exercise Physiology of our
faculty, for his significant contribution.
