.ovrhdot.VO2 [O2 consumption] was obtained for 10 women bicycling on rollers at 3 saddle heights (SH), 95, 100 and 105% trochanteric height. Kinematic patterns described by the hip, knee, ankle and foot were discerned from 1 pedal cycle at each of the 3 SH. Subjects cycled on a Fuji Dynamic ten 10-speed bicycle, at 60 rpm, (a work load of 799 kpm[kilopound meter]/min was applied by a tensioning belt from a bicycle ergometer) until they reached steady state. Expired air was then collected, and films were taken during gas collection. The 100% SH was most efficient, mean values for 95, 100 and 105% SH were 1.69, 1.61 and 1.74 l/min, respectively. Kinematic patterns showed no variation in the range of motion (ROM) at the hip, and values at the dead centers (DC) did change. The ROM at the knee varied from 69-82.9.degree., 95-105% SH, and values at the DC varied. Plantar flexion (PF) at bottom dead center increased by 10% from 95-105% SH. Foot angle showed no significant variation with increasing SH. Major adaptations to increases in SH were at the knee and in ankle PF.