Ready for a huge HIIT fat-burn? | Men's Health UK

Interval sets are important to improve your swimming. Human beings are creatures of habits and generally try to optimise where they can, so does their body. If you go to the pool 3 times a week and swim 2km without stoping that is great and all and in the beginning it will get you started but at some point you won‘t do any improvments anymore and trust me this is not only related to the technique or so. It is related to the fact that your body starts to optimise. If lets say your first training