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» 100-Days to a Marathon

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Day 051 - Set Time Intervals

15-minute endurance (EN) warm-up run at level 2 intensity (70-75% MHR) followed by a 15-minute interval (IN) run at level 4 intensity (80-90% MHR). Cool down with a 15-minute EN run at level 2 intensity.

TODAY, DO AN INTERVAL (IN) RUN FOR 15 MINUTES AT LEVEL 4 INTENSITY. Pick a favorite trail or park and warm up for 15 minutes. Do a set of timed intervals, run at level 4 intensity for 2 minutes, recover by walking easily for 60 seconds, repeat 5 times. Cool down for 15 minutes by walking or jogging.