Canine agility is a fast and physically demanding sport, and injuries affect up to 42% of participating dogs. These injuries can lead to long recovery periods, early retirement, and lasting health consequences. Currently, there is no technology to measure the physical demands on agility dogs or to detect early warning signs before injury occurs. This project addresses that gap by developing AGILE, a wearable sensor system paired with a smartphone app, to track training activity, measure workload, and identify abnormal movement patterns or performance changes. Handlers and veterinarians will receive easy-to-use reports and alerts, helping them recognize potential injury risks earlier and adjust training accordingly. Although focused on agility dogs, this technology has the potential to benefit all sporting, working, and even companion dogs by supporting better health, preventing injuries, and extending their active, healthy years.