I golf about 1/week - and that twisting stoke can make anyone's back ache.
I wear a neoprene brace - more to keep the area warm than for support.
I also exercise the area by doing what I refer to as a reverse crunch. It does a great job of strengthening my lower back. I lay face down - arms at my side and lift my shoulders and heels up about 6-8" each - then lower them. I'll do 3-4 sets of 50.
You can make it harder by putting your hands in front of you or holding the crunch longer. You can aslo make it easier by leaning up against the wall - and well - making a thrusting motion with your hips. And yes it's good practice for stand-up doggie sex - or pegging!