Another pinner said: This website is AMAZING. It is my workout bible, and best of all, its completely FREE. Tons of workout vids and plenty more to stave off ruts. Most of the routines are between 12-20 mins long and that's all you need.
I LOVE THIS GIRL! She has amazing work outs that usually take around 15-20 minutes and work you very hard! She puts videos on her site for beginner, intermediate, and advanced levels. I highly recommend her videos
CRAZY!!!!!!! Lol Interval Training 1 minute at 5.0 1 minute at 5.5 1 minute at 6.0 1 minute at 6.5 1 minute at 7.0 1 minute at 7.5 1 minute at 8.0 2 minutes at 4.5 Repeat five times. I love me some intervals!! Doing his for a WEEK to see the awesome results fast!