Basic Heart Rate Training Plan. By alicia clark mar 19, 2021 workouts. 12 x 400m with 200m jog recoveries, making sure recovery heart rate drops to at least 70%.

Here is a simple plan to follow for doing a sub 20 5k based solely on using hr training zones. By alicia clark mar 19, 2021 workouts. Then you can spend up to 20% of your training doing speed work.