The Anterior Cruciate Ligament (ACL) helps keep the knee stable, and prevents it from sliding forward. When you have a Torn ACL, your knee can become painful and unstable. These stretches and exercises are for a non-operative or pre-operative injury. See Doctor Jo’s blog post about this at: http://www.askdoctorjo.com/content/acl-tear-stretches-exercises
Complete 4 rounds of the circuit using a challenging weight (i.e., you can complete 8 reps, but couldn’t get to 10 if you wanted). If you finish each set feeling like you could keep going, then increase the weight.