## Heart Rate Zones Training for heart rate zones needs a heart rate monitor that is reliable. Apple Watch on the wrist can have variances of up to 15bpm, and it measures only every 6 seconds There are five heart rate zones: ### Zone 1 The easiest, recovery / active recovery. There is some activity. You should be able to maintain this indefinitely. Try not to exceed 20m for recovery. ### Zone 2 Used to developing pathways that provide energy. Light sweat, should be able to talk. Ideally maintainable for 1h30m. ### Zone 3 Should be able to run for about 30-40m at this. Breathing hard, probably can talk a little bit but not much. ### Zone 4 Intervals that are shorter then 3m but longer then a minute. ### Zone 5 Ideally for bursts, maximum effort. Less then a minute. At least rest for a minute after.