• Assessing the frequency of high-demand activities in athletes with knee disorders.
• Evaluating pre-injury activity level as a "gold standard" for recovery goals.
• Comparing activity levels between different knee pathologies (e.g., ACL vs. Meniscus).

• Running: Running while playing a sport or jogging.
• Cutting: Changing directions while running.
• Decelerating: Coming to a quick stop while running.
• Pivoting: Turning the body with the foot planted (e.g., skiing, kicking, throwing).

• 0: Less than 1 time / month
• 1: 1 time / month
• 2: 1 time / week
• 3: 2 – 3 times / week
• 4: 4 or more times / week

The MARS captures how often a knee is subjected to "extreme" loads. A score of 16 indicates a very high-demand athlete, placing them at higher risk for subsequent degenerative changes if mechanical integrity is compromised.

• Ask the patient for their activity level during their healthiest point in the past year to set the recovery target.
• The MARS is less biased by specific sports preferences than the Tegner scale (it focuses on biomechanical demands instead of sport names).
• MCID: Typically cited as 2 points.

• Target Setting: Aim for 100% of pre-injury MARS frequency before full discharge from rehab.
• Risk Stratification: High-frequency pivoting (MARS Pivoting = 4) requires superior limb symmetry (>90%) and perfect "Dynamic Alignment" (VALGUS/VARUS control).