Riding a bike to work comes with lots of rewards. Planet Earth isn’t doing so hot, and riding a bike to the office can make all the difference, according to Renee Rivera of the San Francisco Bike Coalition. And that’s not all pedal pushing can do for people. Rivera says riding a bike as part of the daily grind is often faster than driving in rush hour traffic, saves money on gas, and also earns rider’s a nice, firm butt since it’s an excellent way to “stay in good shape.”