Figure 2. vGRF – time curve and hip, knee, and ankle joint moment – time curves during a DL task from a 60-cm height. vGRF = vertical ground reaction force; vGRF1, vGRF2 = the first and second peaks of the vertical ground reaction forces; MH1, MH2 = two typical peaks in the hip joint moment – time curve; MK1, MK2, and MK3 = three typical peaks in the knee joint moment – time curve; MA1, MA2 = two typical peaks in the ankle joint moment – time curve.