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.
400 meter Run 15 Clean-and-Jerks (155/105 lb) 400 meter Run 30 Toes-to-Bars 400 meter Run 45 Wall Ball Shots (20/14 lb) 400 meter Run 45 Kettlebell Swings (1.5/1 pood) 400 meter Run 30 Ring Dips 400 meter Run 15 Weighted Lunge Steps (155/105 lb) 400 meter Run
100 foot Handstand Walk 100 foot Walking Lunges (2x22.5/15 kg) 6 Ring Muscle-Ups 100 foot Handstand Walk 100 foot Walking Lunges (2x22.5/15 kg) 4 Ring Muscle-Ups 100 foot Handstand Walk 100 foot Walking Lunges (2x22.5/15 kg) 3 Ring Muscle-Ups