Organized Muscle

https://experiencelife.com/article/the-ph-factor/

http://www.healthline.com/health/pain-relief/knee-pain-stairs

Steps to Relief: Stairs and Knee Pain Get tips for using stairs to your advantage.

http://consults.blogs.nytimes.com/2009/06/15/stairs-as-fitness-tool/?_r=0

Stairs as Fitness Tool? Ia there a worthwhile health benefit from walking down stairs?

http://www.womansday.com/health-fitness/a5436/10-surprising-benefits-of-exercise-113925/

10 Surprising Benefits of Exercise Discover other perks—besides weight loss—to working out regularly

http://www.boston.com/health/2014/06/04/take-the-stairs-battle-heart-disease/k5OgIeOrqeDORRu5Hjtt2I/story.html

Take the Stairs to Battle Heart Disease A sedentary life contributes to a host of health problems, not the least of which is heart disease. One of the best ways to combat this is to integrate stair climbing into your daily routine.