![Planks build core strength, which is essential for improving and maintaining running form. Photo: www.shutterstock.com](http://cdn.triathlete-europe.competitor.com/files/2015/12/run-1-300x200.jpg)
Planks build core strength, which is essential for improving and maintaining running form. Photo: www.shutterstock.com
Got five minutes a day? Try these methods to gain strength and improve your running form. The challenge: In 24 hours, balance work, family,