Good morning (as I breathe hard and fast!) I just closed my office door and did this 4 minute (WORLD'S FASTEST WORKOUT VIDEO!)!! And it had me tired!! Anything I learn new worth sharing, I love to share it! I saw this video last week on another blog and sent it to my friends. Well today I tried it for myself and said... let me post this. Now the benefit of this video is metabolism. The claims are that it will raise your metabolism for up to 36 hours! It's 20 seconds of work, followed by 10 seconds of rest! Enjoy!