I didn't say the driving range. It's a combo of the swings and walking on the course.I'm talking from experience. You getting sore from going to the driving range vs me not getting sore says a lot more about you than it does my swing.
I've golfed longer than you and I'm better than you. I was sore after walking 18 10 yrs ago in my early 20s and in the best shape of my life. And yes, I was in good shape. I had less than 6% body fat at one point.
Oh, do I long for those days.
You said swinging the club is a good workout. I wouldn't call it that.