One look at the posters, and you'll be lacing up those workout shoes in no time. We have a feeling 2014 is going to be a good one. Source: Etsy user vbtypography ...

If you want a real stair challenge, this 30-minute indoor stair workout will burn tons of calories and work your entire body. Get a printable version of this poster here!

Group fitness classes, by their nature, encourage commitment. When you have a set time to meet and familiar faces expecting you, skipping a workout feels like letting others down—not just yourself.