Come rain or shine, a good treadmill workout is all you need on days when getting outside doesn't appeal ...

The Coros Pace 4 is light, reliable, packed with tracking features and lasts up to 19 days on a single charge. The best part? It is surprisingly affordable.

Combining Zone 2 running, goal pace running and sprinting in your weekly training plan can be ideal for developing aerobic endurance, pacing skills and explosive speed.