What is the difference between Zone 4 and Zone 5 training?
Zone 4 is for anaerobic capacity, the limit of energy your body can produce using anaerobic means, and should be about 80-90% of your HRmax. Zone 5 is the target zone for short burst speed training and should be about 90-100% of your HRmax.
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Physiological adaptations are similar as mentioned above for Zone 3, just even more so, especially the ability to clear lactate. Intervals in Zone 4 can really improve your lactate threshold and help you either go faster or closer to your threshold for longer.
LONDON ZONE 4, 5, & 6Living in zone 4-6 in London is a good place to live if you wish to stay in more relaxed and quiet areas of London. Still within commuting distance but with the opportunity to explore hidden and lesser known wonders.