Premium ContentBID (Break it Down) Vids BID VID – Straight Leg Sit-up By CoachDos - June 24, 2014 1330 FacebookTwitterPinterestWhatsApp Basic yet effective exercise today – The Straight Leg Sit-up. Great for drilling in great lumbar and thoracic spine extension….something many of us are lacking from constant poor posture! [jwplayer mediaid=”5243″] Post Comments comments