I have read on the internet that the hard surface of the treadmill harms your kneecap or joints. Different people have different opinions, My gym mates advised me it's not harmful when you do it 3-4 days a week. I usually run the treadmill for 15 to 20 minutes, I set the limit of 20 minutes on the treadmill after that it automatically slows down.
I know from experience this is false. I had an old R4 driver that I loved. I got a new Nike Vapor Pro driver when they were on crazy sale because Nike was getting out of the clubs game. I instantly gained ~15 yards of carry on my drive.
I've never gone and spent a ton getting fit for and buying the right putter. But I've read enough descriptions of Edel fittings from good fitters that I'm pretty convinced that, if you have a reasonable and fairly consistent putting stroke, even if your results are below average, that you could also get significant gains from an excellently fit putter as well.
General inconsistency is my biggest issue. I never have everything working fairly well all at once. Plus I have a mental block when I have a second shot from the middle of the fairway. Almost every time I hit a great tee shot, which isn’t often, I either shank my second shot or bounce it about 50 yards.