I use the "Pillow pal" for the bed. It is just a thin slab of fiberglass, that slides between the mattress and either the frame or box spring, your holster clips onto it. This way if I just drop my hand down the side of the bed the gun is right there. I have used this method for 25 or 30 years, and it works on most holsters. I have turned countless people on to it. If you look it up, just google Pillow Pal holster or gun retention, it's cheap. Once you see it you can make one from a piece of wood. It works.
When I was younger I carried in my ankle, in my 20's to 40's, while at work. Now I pocket carry. I do wear a fanny pack sometimes, "I used to laugh at the too", but after a while, there just is no place to put all of this stuff. Wallet, keys gun, phone, knife, Light, You either need cargo pants or a pack of some kind. Especially if you carry 2 spare mags.
Really where are you going to put it all? I pocket carry the pistol, so the fanny Pack I just a distraction, it's full of my other junk.
Anyone going for the pack is welcome to it as the gun is in my rt hand pocket.
I could leave much of this stuff at home, but have just gotten so used to clipping one thing on, that I know where everything ,and it's easier than putting ten things in different pockets. It's almost like a utility belt. A tee shirt covers it up and out you go.
I am big enough to get away with it, some guys have these huge packs on that scream ,GUN. mine is really small and just fits the wallet, and stuff I need like car keys mags and a small tac light.
As far as exercise goes, I owned a world Gym, and have done the training thing for 40 years, way before it became popular, so I stay in shape even with a bad back. I gave many guys in here routines over the years. The main thing is to do something. It doesn't matter if it's walking or the elliptical trainer, but you have to get in there at least 4 days a week for an hour. I was going 6 days but this year was rough, if I get in 4 days it's ok.
And you need weights to burn calories, most people think just cardio will do it, but after a while you need the large muscle groups to burn calories, that means weight training.