Range of Motion: 90/90 Active Knee Extension (AKE)

range of motion Aug 27, 2023


  1. Have the client adopt a supine position lying down on a massage table or mat. Once established, have the client bring their hip up into 90 degrees of hip flexion. 
  2. Align the Measurz inclinometer with up and down next to the client’s knee and in line with their hip. This will allow us to know whether we are in a neutral position.
  3. Instruct the client to extend their knee up, then measure the angle using the Measurz inclinometer alongside the client’s tibia.
  4. Press the pause/play, followed by the save button to save and view the results. NB: We should see a result of as close to 0 degrees of knee extension as possible.

We're aiming to see a result of as close to 0 degrees of knee extension as possible.



  1. Siti Nur Baait Binti Mohd Sokran, Rogini A/P Periasamy, Jibi Paul (2019). Inter-rater and intrarater reliability between experience and non-experienced examiners on 90-90 active knee extension test using goniometer among healthy college students, ijmaes, 5(3), 586-593.
  2. Herrington, L. (2013). The Effect of Pelvic Position on Popliteal Angle Achieved During 90:90 Hamstring-Length Test. Journal of Sport Rehabilitation22(4), 254-256. Retrieved Aug 25, 2023, from
  3. Malliaropoulos N, Kakoura L, Tsitas K, Christodoulou D, Siozos A, Malliaras P, Maffulli N. Active knee range of motion assessment in elite track and field athletes: normative values. Muscles Ligaments Tendons J. 2015 Oct 20;5(3):203-7. doi: 10.11138/mltj/2015.5.3.203. PMID: 26605196; PMCID: PMC4617222.

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