From my POV, there are only a few truths one needs to adhere to:

1) Muscles do one of 3 things. They get bigger. They get smaller. They stay the same size. They don't turn to fat or have brain cells. Muscles are made of muscle cells.

2) Bigger muscles are stronger muscles. Smaller muscles are weaker muscles.

3) Muscle growth is a response to stimulus. Therefore, maximum stimulus results in maximum growth. Get strong first, then condition that strength for 'endurance' if need be.

Now that I've got that out of my system...

Chris, core workouts and leg workouts are your biggest and most immediate benefits. Strong legs provide a stable base for the golf swing, and a strong core helps provide more power for the swing. The key is doing maximum intensity workouts to provoke the strongest growth response. So squats (either in the rack on with the cart) for the legs and weighted crunches and pull downs for the abs.

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PCS Class 'A' Clubfitter - www.pcsgep.com
True Length Technology Fitter - www.truelengthtechnology.com
It's live! - www.ShipShapeClubs.com

A new highlight: Golfing the home course on Christmas Day.

I say it too often: If it's golf club shaped, you can play with it.

For the record, I'm a club doctor, not a swing doctor.