01/12/2012 08:10 am ET Updated Dec 06, 2017

Yoga Journal's 21-Day Yoga Challenge, Day 4: Standing Poses With Jason Crandell (VIDEO)

Today's series is all about lifting and lengthening. These standing poses express the full reach of our bodies, from toes to finger tips. That brings a nice stretch, but it also helps strengthen the lower body, which must serve as a steady base for the lifted torso and limbs.

When Yoga Journal put out the call for their 21-Day Yoga Challenge, we knew we wanted to be a part of it. Over the course of three weeks, we're going to learn to incorporate a daily practice of breathing, meditation and vegetarian eating to our busy lives. We're hoping to emerge stronger, more flexible and mindful of the choices we make for our bodies. You can check out our progress at Team HuffPost's Social Workout page and you can follow along on our blog. Want to join the challenge? Click on the leader board below to become a part of Team HuffPost!