Effect of training status on oxygen uptake response to exercise onset

DOI HANDLE Web Site Open Access

Search this article

Abstract

We examined the effect of training on oxygen uptake (V0_2) kinetic response to the exercise onset, using cross sectional model. Twenty male subjects (VO_2max range: 41 - 60 mL/min/kg) performed six-minute cycle ergometer exercise at a work rate corresponding to 80% of the ventilatory threshold after three minutes of unloaded cycling. The responses in VO_2, heart rate (HR), cardiac output (Q), and deoxygenated Hb+Mb change (DeoxyHb) were determined from the data averaged from four repetitions, fitted with a mono-exponential model. The response time was assessed as the sum of delay and time constant (MET), which represents the time to reach 63% of the steady state response. The VO_2 MET (phase 2) significantly correlated with the HE MET (r= 0.55) and Q MET (r= 0.57). The DeoxyHb MET did not correlate with the VO2 MET in all subjects (r= 0.17), but correlated with the V02 MET in each swimmer and untrained group (r= 0.96, n= 6; r=0.73, n=7, respectively). It was suggested that responses of central circulation and local oxygen utilization affect individual VO_2 response in various training status.

Journal

  • 健康科学

    健康科学 27 33-40, 2005-03-25

    Institute of Health Science, Kyushu University

Keywords

Details 詳細情報について

Report a problem

Back to top