Cross training for runners is any type of workout that compliments your running. It helps to improve your overall fitness and make you a better runner. Swimming, cycling, and yoga are all examples of cross training activities.
Most runners would rather be out running instead of in the gym or doing other activities. But cross training can help prevent injuries by allowing your body time to recover from the repetitive impact of running.
HIIT workouts are a big injury risk for most runners. For injured runners, beginner runners, older athletes, or just injury-prone runners, cross-training exercises in the gym can be a better way to complete a high-intensity session.