Fig. 4From: A novel push–pull central-lever mechanism reduces peak forces and energy-cost compared to hand-rim wheelchair propulsion during a controlled lab-based experimentEffective propulsion forces for 15 cycles during a single block of two individual participants, one for the RoChair and one for the HRW. The blue line is the average of the 15 pictured cycles. A Pre-test in the RoChair. B Pre-test in the HRW. C Post-test in the RoChair. D Post-test in the HRWBack to article page