Originally Posted by MarkI
I could see why having toes pointed straight or inward would create unnecessary stress on the knees. I squat kind of wind and always have my toes pointed out around 45 degrees.
Yup. If your toes point inward, attempted excess tibia IR leads to femur ER at the beginning of the lift, and in the off case your femur isn't rotating more, then your knee joint is being twisted. Too much ER and sometimes people with unknown structural issues can tear cartilage. Add weight and downward motion, goodbye friends. An often useful test is to check both your ER and IR. Many people lack IR and vice versa, or both. Some medium between toes out and toes ahead seems to be just fine, just remember to involve glute med, max, etc.