Cheaters in a Sports Tracking App

Imagine you're working for a company that offers a sports tracking application, which records and displays data for activities like running, jogging, and cycling. The app monitors various metrics such as distance, pace, splits, elevation gain, and heart rate. Your task is to develop a method to spot users who might be cheating – for instance, those who drive a car but claim to be cycling. Which metrics would you focus on, and what statistical approaches would you employ to detect unusual athletic patterns that suggest dishonest behavior?