Table 2. Scoring criteria of forward step down performance test.
Criterion Interpretation for failed movement
Arm Failure to keeping the arm folded across the chest
Trunk Trunk leaning in any direction
Pelvis Pelvic movement in horizontal plane
Knee Valgus collapse (tibial tuberosity medial to medial border of foot)
Steady stance Stepping down on nontested limb, or the foot wavering from side to side