Travel HIIT is the best app to stay fit while travelling. Users can access professionally developed, fun and functional workouts when staying at Travel HIIT partner hotels. The free fitness app features daily workout videos as well as a built-in timer clock to make bodyweight workouts even easier and more convenient. The good news is that even if travellers are not staying at a participating hotel, they can still access the Travel HIIT app and select the You HIIT body weight workout for free and  complete the workout in their own time. High-intensity interval training a.k.a HIIT is recognised as…