I would definitely start with a TPI trainer who not only golfs, but works with a PGA certified TPI golf pro.  The trainer can work with your pro to help find out what your strengths and weaknesses are as it relates to your golf swing and musculature and set up a program to strengthen your weaknesses.  That way both your trainer and pro can be on the same page and work together to help you.  You can find a TPI trainer at http://www.mytpi.com/find/default.aspx?continent=NA

I am not a +40year old but i'm getting there.  I like to workout during the off season and try and focus on large muscle groups at the beginning of the off season, try and bump strength up and maximize growth and calorie intake.  i love the off season eat like a pig....  Anyway probably about 6 weeks prior to the season i focus more on light training and cardio.  Since i prefer to walk, in my opinion the best way to enjoy all that the game has to offer, it's best to start the season in good shape for climbing the hills on my home course.

I wish i had the money and time for a TPI trainer but i don't.  There are a lot of resources online that you can check out also.  Good luck, and don't hurt yourself

The TPI has a whole library of exercises that you can access and do online (no charge) and add to your own workout program.

As a fellow 40+ golfer, I do a combination of TPI suggestions and Yoga sessions (http://www.yogaforgolfers.com/index.html is one example). The Yoga really helps me with strength and flexibility.

I agree on the yoga - my husband thought it was just for women and then he went a couple of times with me and started to hit the ball more solid, further and with better balance.  He is hooked.

Cathi,

I found the same thing about Yoga. I was really surprised at how much of a workout it actually was. I was sore after the first few sessions, but now my posture and ball striking are getting much better. The Yoga sessions I do really concentrate on my core and flexibility -- two areas any older golfer could use a lot of work on.

Most importantly, it helped dropped my handicap back down to my pre-kids and pre-40s area. I started the season at around 15. Now, I'm down to 9-10. 

Another side benefit - you get taller or maybe you just don't get shorter :)

I'm already 6'5". Really am standing up taller now though.

Pump a lot of irons Chris! Soon you'll be driving it 350 plus lol!

Chris92009:

I'm 70 years old and I have followed a exercise program all my life.  The key to good physical conditioning is any exercise, the idea is to establish a routine that you will want to perform not one that you do and hate but do it because some "expert" says that it is good for you, in the end you will find excuses to stop.

To increase your flexibility, swing a weighted golf club several times a day.

As for strength, a visit to a local gym will help.  I personally prefer to work out at home. 

Now remember I have been exercising all my life, so what I might do or suggest may sound excess. for example, I have a chinning bar in my home and I use it three times a week.

LIght barbell or dumb bell exercises are a good start. Avoid overhead presses they will damage your back.

The use of rubber exercise bands and tubing is an excellent alternative to weight lifting.

As for my game and does exercise help.  I 'm 5'8" 170lbs and average 260 yds. off the tee.  I don't play the senior tees.

Just some comments.

vincenta