Study on the Propulsion Efficiency of Working Ro-Scull based on the Energy Expenditure

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  • エネルギー代謝量からみた和船櫓漕ぎの推進効率の検討

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The Japanese boat “Wasen” uses “Ro-Scull” as a human-powered propulsion system. These traditional boats and propulsion system are almost vanished in Japan due to decrease in material Wood, and boat-builder’s aging. “Ro-Scull” is thought to be effective propulsive method compared to other human-powered boat such as canoe and cutter boat. In this study, we evaluate propulsive efficiency of “Ro-Scull” based on active metabolic rate (MR). We measured MR and metabolic equivalents (Mets) during “Ro-Scull”, Walking, and jogging exercise by using indirect calorimeter. MR and Mets during “Ro-Scull” exercise were nearly equal to walking ones. Energy conversion efficiency of “Ro-scull” was 12.3%. These suggest that propulsion efficiency of “Ro-Scull” is efficient, and its exercise can be done for a prolonged time as well as Walking. “Ro-Scull” exercise seems to be useful way to become familiar with maritime activities and seamanship.

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