I used to think that. Then I got into endurance sports. It’s akin, I guess, to bodybuilding. You’re building a well-oiled machine (you). You’re tweaking your t

I used to think that. Then I got into endurance sports. It’s akin, I guess, to bodybuilding. You’re building a well-oiled machine (you). You’re tweaking your training plan and seeing how you respond. You monitor your resting HR and see it go down as you get fitter. It helps to go do the sport someplace picturesque. While it’s true that you can spend any money on a bike, I bought my best bike for £180. Running is even cheaper, I buy a pair of shoes every 18 months or so for about £100 and that’s more or less it.