Sounds like a fun project. Start with a base of five stations: sprint, kettlebell swing, battle rope, box jump, and a cool‑down jog. For timing, put a 30‑second work interval followed by 15‑second rest, using a metronome app that logs each beat. Use a smart watch or chest strap that records heart rate and GPS to give you real‑time stats. To keep it game‑ish, add a leaderboard for total reps or time to beat, and let the app ping you when you hit a personal best. Add a small pause after each round to check your data and tweak the next set. That gives you the science precision and the adrenaline of a race.