The Effect of Different Standing up Frequencies in Sit-to-stand Exercise on Oxygen Uptake

抄録

[Purpose] The aim of this study was to investigate the steady state of oxygen uptake (VO₂) at several standing up frequencies to clarify whether workload in the sit-to-stand exercise (STSE) is greater than the anaerobic threshold (AT). [Subjects] Ten healthy young subjects performed the STSE. [Methods] In the STSE, subjects stood up and sat down without using their arms to push-off from the chair at standing up frequencies of 6, 12, 18, 24, 30, and 36 times per minutes. Subjects exercised for 5 minutes at each frequency with 5 minutes of rest between each consecutive frequency trial. The steady state of VO₂ was evaluated by the difference in the VO₂ between the 3rd and 5th min at each frequency. The correlation between the VO₂ of the STSE and the standing up frequency was analyzed. [Results] At standing up frequencies greater than 24 times/min, the steady state of VO₂ could not be confirmed. The relationship between the standing up frequency (at less than 24 times/min) and VO₂ was strong (r=0.94). [Conclusion] The STSE may be a potentially useful test for determining AT and predicting the physical capacity of patients.