Here is a great workout challenge for February 2014. I came across this challenge on Yvette Salva Fitness Blog. A great way for the runners among you to get stronger and get to where you want to be. Yvette has even provided a nice legend illustrating how to properly do your lunges. If you want an added challenge, use light weights in each hand as you do your lunges to help tone your arms and feel a deeper burn. Add this challenge to your regular workout routine or make it your main goal. Feel to share, pin and repost as you want.