1. Bilateral kinematic and kinetic analysis of the squat exercise after anterior cruciate ligament reconstruction1 
George J Salem, PhD, Ruben Salinas, DPT, F.Victor Harding, MA 
Archives of Physical Medicine and Rehabilitation 
Volume 84, Issue 8, Pages (August 2003)
DOI: /S (03)

2. Fig 1
Free-body diagram illustrating the direction of the internal (muscular) moments (M) and joint excursion angles (A) for the ankle (a), knee (k), and hip (h) joints. Abbreviations: ASIS, anterior superior iliac spine; PSIS, posterior superior iliac spine.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (03) )

3. Fig 2
Representative net moment/time curves for a single participant for (A) knee extensors and (B) hip extensors. Data are from 3 successive repetitions within a single set; vertical bars identify the time of maximum knee excursion angle; the ascending (ASC) and descending (DES) phases of each repetition are shown.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (03) )

4. Fig 3
The average peak hip extensor moment to peak knee extensor moment ratio. ∗Hip:knee ratio (HKR) was 46.5% greater in the involved limb (P=.02).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /S (03) )