The Last Few Degrees: Why a Knee That Will Not Fully Straighten Matters
Most people worry about how far their knee bends. Can I squat? Can I kneel? Can I get up off the floor? Those are the questions that come up, and they are reasonable ones. Almost nobody worries about whether their knee fully straightens, which is unfortunate, because a small loss at that end of the range has consequences out of all proportion to its size. Five degrees sounds like nothing. In a knee, it changes how you walk, how hard your quadriceps work, and how much you trip.