For me, I have to work out daily or I get out of my habit. One day of no exercise makes it easier to do another day without exercise. For me even if I only do 10 mins, it is about doing the work out not the time spent. 10 mins is better than no mins and you can pack in a killer work out in just 10 mins that will burn 200 plus calories if you get your heart rate up quickly and keep it up the entire time. Today is your day! Get out there and get it done!