Journal d'ergonomie
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Simultaneous Continuous Measurements of Propulsive Force and Oxygen Uptake in Stationary Fin Swimming

Christian Jammes, Abdoulaye BA and Yves Jammes

New tools were conceived to simultaneously measure the propulsive force and the oxygen uptake (VO2) during fin swimming with no forward displacement. The subjects were totally immersed and stayed in horizontal position, pushing against vertical handles with the arms stretched out. A face mask and its snorkel were connected to transducers giving measurement of ventilation, VO2 and CO2 production. The propulsive force was measured by a load cell connected to an immersed vertical lever arm, supporting the handles. A computer gave breath-by-breath measurements of the propulsive force and VO2. The kick frequency was increased by steps until the VO2 max had been reached. The propulsive force was linearly proportional to the kick frequency and VO2. The experienced subjects produced higher propulsive force for the same kick frequency and VO2 than the subjects having no experience of fin swimming. The measurements of propulsive force and VO2 during swimming may constitute an useful tool to assess the individual capacities of subjects.