1 Hamamatsu University School of Medicine, University Hospital, Shizuoka, Japan
2 Rehabilitation Sciences, Seirei Christopher University, Shizuoka, Japan
Shinta Takeuchi ✉ Hamamatsu University School of Medicine, University Hospital, Department of Rehabilitation, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka 431-3192, Japan Email: take.shin1110@gmail.com
Publish Date
Received: 08-05-2014 Accepted: 26-08-2014 Published (online): 01-12-2014
Shinta Takeuchi, Yusuke Nishida, Takashi Mizushima. (2014) Effects of Synchronization between Cardiac and Locomotor Rhythms on Oxygen Pulse during Walking. Journal of Sports Science and Medicine(13), 881 - 887.
Shinta Takeuchi, Yusuke Nishida, Takashi Mizushima. (2014) Effects of Synchronization between Cardiac and Locomotor Rhythms on Oxygen Pulse during Walking. Journal of Sports Science and Medicine(13), 881 - 887.
The oObjective of the study was to investigate whether the occurrence of cardiac–locomotor synchronization (CLS) affects oxygen pulse (O2 pulse, mL/beat) during walking. Twelve healthy men were studied under two treadmill protocols. The CLS protocol involved subjects walking at a frequency of their heart rate (HR) to induce CLS. The free protocol (reference) involved subjects walking at a self-selected cadence. The treadmill load was equal between the two protocols and was adjusted so that the subject’s HR was maintained at approximately 120 bpm. Electrocardiographic signals, foot switch signals, and oxygen consumption (VO2) were measured continuously for 10 min after the heart rate reached a steady state. VO2, O2 pulse, and mean HR were calculated. VO2 and O2 pulse were significantly higher in subjects in the CLS protocol compared to those in the free protocol. However, mean HR was not different between the two groups. The synchronization strength was significantly related to the increase in O2 pulse in subjects in the CLS protocol compared with those in the free protocol. These results suggest that the occurrence of CLS enhances O2 pulse by increasing the strength of CLS during walking.
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