Figure 3From: Efficacy of intra-articular hyaluronan (Synvisc®) for the treatment of osteoarthritis affecting the first metatarsophalangeal joint of the foot (hallux limitus): study protocol for a randomised placebo controlled trial Measurement of plantar flexion strength of the toe-flexors of the hallux. Participant positioning (A) and recording of forces produced under the hallux (B).Back to article page