Friday Fartlek Run: 4x 5min Threshold

This session is great to develop speed for runners aiming for an event between 5km and marathon distance. Each week I will be posting the Friday Fartlek Run Sessions that you can do to enhance your running. Fartlek is a Swedish term that is often used by runners and it means speed-play. See a previous post about training intensity (levels) … Continue reading Friday Fartlek Run: 4x 5min Threshold