Weekend Challenge Reminder! Don't forget to do your 3 sets of 8 v-ups. If you normally do crunches to work your core, check this out: Researchers at the University of Virgina found that it takes 250,000 crunches to burn 1 pound of fat—that's 100 crunches a day for 7 years. V-ups, which multiple muscles, allow you to burn more calories, which makes it a more effective exercise! Now, go bang out those v-ups! read more..