Strengthen Your Core with this 28-Day Planking Challenge (in Just a Few Minutes a Day)
This 20 minute yoga workout for weightloss is quick and fun! It's easy enough to be great yoga for beginners but effective enough for those that do advanced yoga poses! http://avocadu.com/free-20-minute-yoga-workout-for-weight-loss/
3 min arms workout
2-Week Plank Challenge: Build Up to a 5-Minute Plank
The 5-minute full-body plank workout that requires almost no movement... but you'll feel it working!