TODAY, DO AN INTERVAL (IN) RUN FOR 20 MINUTES AT LEVEL 4 INTENSITY. This month you'll be doing longer interval sessions to help improve your level of fitness and feel for going fast. Warm up for 15 minutes at level 2 intensity, then, using a relatively flat section of road or trail, go hard for 4 minutes, holding a level 4 intensity, walk easily for 1 minute, repeat 4 times. Cool down by walking or jogging for 10 minutes at level 2 intensity. These longer intervals require a good focus of attention, focus on good technique and breathing.
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