(Hoch & McKeon, 2011)
Aims: To examine the bilateral symmetry of the WBLT in healthy adults and elucidate the individual influences of age, height, mass, leg length, foot length, and posterior displacement of the ankle subtalar-joint complex on WBLT performance.
Methods: 35 healthy adults. 6 trials on each limb, 3 last analysed. Progress every cm until lifting of heel, then smaller increments. Measurement of post displacement of subtalar joint and other individual variations.
Results: Strong intra tester-reliability of the WBLT. No significant relationships between WBLT performance and age, height, mass, left leg length, left foot length, or left posterior talar displacement. Majority of healthy adults exhibited lunge distance asymmetries on the WBLT of 1.5 cm or less (68% of the distribution); however, some individuals demonstrated up to approximately 3 cm bilateral differences. Norm is = 12cm +/- 2,8cm.
Limitations: Healthy adults only. Only intra-tester reliability. Small sample.
In practice: Norm for WBLT is 12cm +/-2,8cm. Normal ≠ between legs 1,5cm. Good intra-tester reliability.
Hoch, M. C., & McKeon, P. O. (2011). Normative range of weight-bearing lunge test performance asymmetry in healthy adults. Manual Therapy, 16(5), 516–519. https://doi.org/10.1016/j.math.2011.02.012