Mona Fartlek
2×90 s · 4×60 s · 4×30 s · 4×15 s hard, equal floats — 20 min
Workout type
Fartlek — Swedish for 'speed play' — mixes fast running with easier running without stopping. These are set by time: the Mona fartlek and variations reported from Eliud Kipchoge's training group, each with its source on the page.
2×90 s · 4×60 s · 4×30 s · 4×15 s hard, equal floats — 20 min
17 × 2 min fast / 1 min easy
13 × 3 min hard / 1 min easy, rolling terrain
25 × 1 min fast / 1 min easy
Describe it and it's built for your Garmin — your coach can plan the weeks around it.