The purpose of the study was to determine the influence of varied, controlled distances from the crank axis during arm crank ergometry (ACE) on peak physiological responses and physical work capacity (PWC). Physiological responses to ACE were evaluated using three controlled distances from the crank axis based on 0°, 15°, and 30° from full extension in the elbow while at the furthest point in the crank rotation. Eleven adult, able-bodied women (age = 24.5 ± 4.7 yrs) performed graded maximal ACE tests at each of three distances from the crank axis. Data were analyzed for differences in peak physiological responses and PWC between the three positions. VO2peak at 30° (1.33 L/min) was lower (F(2,20) = 7.171, p < 0.01) than at 0° (1.42 L/min) or at 15° (1.41 L/min). No differences existed between the three distances for any other dependent variable. We conclude that distance from the crank axis during ACE influences VO2peak values, and thus should be controlled for when using ACE to predict aerobic fitness.
Miller, Thomas L.; Mattacola, Carl G.; and Santiago, Mayra C., "Influence of Varied, Controlled Distances from the Crank Axis on Peak Physiological Responses During Arm Crank Ergometry" (2004). Physical Therapy Faculty Publications. 45.