Actually there is plenty you can do, as long as you are prepared to change your mindset.
Thinking outside the box is a common expression we all like to use in boardrooms and offices these days, and yet the mindset or prejudices we have still hang heavily and hinders many people from making progress at anything.
The situation is really very much the same when it comes to any attempt to improve your golf swing.
You my have heard that professionals do work outs of sorts but your mindset keeps you from even taking a look to find out whether the exercises are really as strenuous and vigorous as you fear they may be.
Meanwhile 70 year old and 80 year old men and women continue to dramatically improve their golf swing taking simple exercises and work outs that even help to improve their general health.
Difficult to get out of the sort of mindset that emphasizes that golf is a leisure activity where workouts have no place, no matter how light. At least thats the sort of golf you want to play. So do you really have a chance of ever getting to improve your golf swing?
I really do not think so. To improve your golf swing you really have to be prepared to look at things from a slightly different perspective. And maybe to take a closer look at why other peoples games and most important their golf swing has improved so much.