The lung is a pretty simple movement that you've certainly carried out countless times before, but there are a few significant subtleties that you can consider in order to shield yourself from knee injuries further down the track.
100 meter Run 50 Burpees 200 meter Run 100 Push-Ups 300 meter Run 150 Lunges 400 meter Run 200 Air Squats 300 meter Run 150 Lunges 200 meter Run 100 Push-Ups 100 meter Run 50 Burpees