http://www.sullivangolf.net – From the 2016 PGA Championship at Baltusrol G.C. How to keep your left arm straight in your golf swing? In order to have width in your golf swing, you really would be well served to have good posture, and a good pivot. If a golfer has correct posture, then a good pivot is easier. A correct pivot promotes a full shoulder turn, which in turn provides width of arc, which most gofers see as a straight left (or lead) arm. Here are some links to some videos that will help with posture:
Mike Sullivan teaches golf at numerous PGA Tour events with International Sports Management. Mike also teaches golf in Raleigh, North Carolina. Mike offers golf lessons to players of all ages and abilities, including junior golfers, better players, men and women.
These links will show a more detailed explanation of a correct pivot:
