Knee to Wall Test
This test needs to be done against a wall. A standard tape measure (cm) is necessary. Participants are asked to place their foot in such a way that a imaginary line drawn through the heel and big toe are aligned on the tape measure on the floor. Furthermore, a vertical line is drawn on the wall in line with the tape measure. Participants are instructed to lunge forward until their knee touches the wall (vertical line). The heel is required to remain in contact with the floor at all times. The foot is moved away from the wall to the point where the knee can only make slight contact with the wall, while the heel remains in contact with the floor. This puts the ankle joint in maximal dorsiflexion. The leg not being tested can rest on the the floor and participants are allowed to hold onto the wall for support. The maximum distance from the wall to the tip of the big toe is recorded. The distance is measured in centimeters (cm) with each centimeter corresponding to approximately 3.6° of ankle dorsiflexion. 
The inter-rater reliability for the distance measured for the weight bearing lunge test was R = 0.99 (95% CL: 0.97 - 0.99) The intra-rater reliability for the measurement was also excellent (ICC between 0.98 - 0.99). Furthermore, a recent systematic review on the reliability of the of the weight-bearing lunge test reported that there was strong evidence that inter-rater reliability (ICC = 0.80 - 0.99) as well as intra-rater reliability (ICC = 0.65 - 0,99) of the weight-bearing lunge test is good. It was suggested that the weight-bearing lunge test is a reliable method of assessing ankle dorsiflexion range of motion as it provides consistent results and demonstrates reasonable responsiveness.
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- Bennell KL, Talbot RC, Wajswelner H, Techovanich W, Kelly DH, Hall AJ. Intra-rater and inter-rater reliability of a weight-bearing lunge measure of ankle dorsiflexion.Aust J Physiother. 1998;44(3):175-180. (last accessed 12 November 2018).
- The Physio Channel. Knee to Wall Test. Available from https://www.youtube.com/watch?v=kbzYML05Vac (last accessed 5 March 2021)