As long as you maintain technique to prevent injury and sprinting speed isn’t important to you, this is your best bet. Top 3 Conditioning Exercises to Get Shredded I’d recommend finding a big hill, or a treadmill with an incline 4-6 %. This incline will prevent overstriding injuries prevelant with poor mechanics and fatigue. Start sprinting twice per week after a dynamic warm-up and a few build-up sprints.