Being able to lift your knee when you’re running has a significant impact on your running speed. It's also important for reducing the risk of injury.
Physical Therapy Exercises to Treat Runner's Knee
Kim Nunley livestrong
Is 'Heel Whip' a Harmless Running Form Quirk—Or Is It Actually a Problem?
Runner's Knee Causes & Treatments for Knee Pain After Running
5 Ways to Help Prevent Runner's Knee, Knee Pain
Running livestrong
muscles jogging Cheap Sale - OFF 67%
Muscles Used to Play Soccer
Runner's Knee Exercises - [P]rehab - Running
The Myth of Pheidippides and the Marathon
Common Weightlifting Knee Injuries and Pain