One popular option is bicycling. Bicycling is less stressful on the joints than running and more convenient than dashing off to the gym. Most people already have a bike so it's cheap to get into, and even if you don't have a bike, the investment is well worth it. Which do you think you're more likely to waste, a gym membership or a bike? At least you can loan out your bike or sell it if you don't want it.

So you've decided that you're going to get into biking as a way to improve your health. The first thing you need to do is get a bike. If you already have one that you feel is suitable, then feel free to skip this paragraph. For those of you looking to buy a new bike, your options can be narrowed down to a few basic choices.

carbon mtb rim

carbon bicycle rim

carbon road bike rim