So when playing guitar sitting in a chair with guitar on my knee, i'always had to arch my right foot up on my toes to put the guitar in a comfortabl playing position. Long torso i suppose or small guitars. This morning however i had on some block heel sandals (about 3 inches) and picked up my guitar and boom it was in the right position and no leg cramp. Guess i'll have to wear heels whenever i'm sitting and playing.