While a very heavily weighted club feels good at first, the real strengthening of muscle tone will come from a moderate weighted swing trainer and completing just a 2-3 minute workout 3-4 times a week.  Most golf clubs weigh approximately one pound or 12-16 ounces which means a swing trainer in the 1.5 to 2 pounds or 24 to 32 ounce range is the best weight for building muscle tone.  We caution golfers from using the 40 ounce weight unless they have above average strength and fast swingers playing with stiff flex shafts.  For most men and women the weights are better to stay in the 24 to 32 ounce range.  Our standard mens and ladies swing trainers are weighted for the average golfer playing to a 10-36 handicap for 18 holes