Originally Posted by Gresp15C

I might look at it from the opposite direction: Suppose someone has a big belly and spindly limbs, and wants to get into exercising. Well, a high impact activity like running might be too much cardio all at once, plus their weight compounds the impact. And if they've been heavy for a long time, they might have joint problems at some level, or at least be prone to injury. Also, if you're a male over 40, your ability to build muscle diminishes with every passing year, so you have to choose your battles wisely. A few more ounces of muscle at the expense of damaging your joints might not be the best bargain.

So it comes down to, how about maybe... cycling?

Plus, cycling is pleasant. If you're not primarily motivated by the pleasure of cycling, then it's a pretty tough slog. But it could be an acquired taste, so don't give up too quickly.