Figure 5. Experimental design involved dividing participants into lower hoppers (LH) or higher hoppers (HH). Participants performed 3 trials of a single countermovement hop (CMH), a single drop hop from 10 cm (DH10) and a single drop hop from 50 cm (DH50) in which the carriage was lifted and dropped from each respective height. The HH group hopped significantly higher (A) than LH group for the CMH, DH10 and DH50. The average ground reaction force (GRF) curves (B-D) in relative time are presented for LH and HH. In general, the HH group exhibited more statistically significant GRF during the concentric (upward) phase of the movement as indicated by the shaded light blue areas (p ≤ 0.05). * indicates statistically significant difference between LH and HH (p ≤ 0.05).