Yesterday I twisted my left knee after the walking lunges while screwing around on the rings. I felt pretty good the rest of the day and in fact went on a short leisurely run without problems. I continued the rest of the day with a lot of stretching, walking around and standing (watching Cameron's lacrosee game). This morning I woke up to a tweaked muscle in my left leg, making walking a little difficult. I'm sure it's just an angry muscle so I'm babying it today with the usual type of treatment: ice, heat, elevate, ibuprofen. I will keep up treatment all day -- the only thing I need to do today outside the house is visit the doctor.