The effect of pitched and vertical ladder ergometer climbing on cardiorespiratory and psychophysical variables.
Stewart, Arthur D.
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BARRON, P.-J., BURGESS, K., COOPER, K. and STEWART, A.D. 2018. The effect of pitched and vertical ladder ergometer climbing on cardiorespiratory and psychophysical variables. Applied ergonomics [online], 66, pages 172-176. Available from: https://doi.org/10.1016/j.apergo.2017.09.001
This study aimed to assess whether modifying the pitch of a 75° ladder ergometer to vertical had a cardiorespiratory or psychophysical effect on climbing. Nine male participants climbed a ladder ergometer at 75° and subsequently at 90°, adjusted for an equivalent vertical climb rate, completing three climbing bouts at different vertical speeds. One participant dropped out being unable to complete the climb under the 90° condition. Each was monitored for heart rate (HR), VO2 and rating of perceived exertion (RPE). Results showed vertical climbing induced higher VO2 (mean increase 17.3%), higher HR (mean increase 15.8%), and higher RPE at all speeds and that moving from 75° to vertical exacerbates the effect of speed on the cardiorespiratory response to climbing. This may be explained by increased force production required to maintain balance in a vertical climbing position when the body's centre of mass is not above the feet.