Begin with a dynamic warm-up, including exercises such as high knees, butt kicks, and leg swings. During the 800m run, maintain a steady pace and focus on breathing. For chest-to-bar pull-ups, aim for a full range of motion, with your chest touching the bar. If this is too challenging, modify it with regular pull-ups or jumping pull-ups. In back squats, use a weight that allows for good form throughout the set. If 225/155 lbs is too heavy, reduce the weight to maintain proper technique and safety. This workout is a test of both endurance and strength. Pace yourself during the run and pull-ups, and focus on maintaining good form during the back squats. Finish with a cooldown involving stretching, particularly focusing on the legs, back, and shoulders.