Indoor fitness could pop up for many reasons, the weather being the ultimate of them all. It could range from a scorching sun, heavy/light rain, darkness, dawn etc. A lack of time during the day or even cash crunched to pay for a gym can make an ardent exerciser resolve to stay indoors to do the needful. My own reasons being : I cannot run outside because DH feels it's not safe for me I am not always buoyant enough to pay for a gym subscription I am not rich enough to get the complex machines like a treadmill, stationary bike etc According to Liz Noelcke a staff writer with Sparkpeople, "there is no reason that you can’t make a home gym part of your reality. A home gym adds convenience and privacy to your workouts. When you exercise at home, you save time, money, and the rush hour headaches (on the road and in line for the elliptical). Although you might be cautious due to budget and space limitations in your house, building a home gym isn’t as impractic...