“Wrap a band around your bicep until it begins to go numb, then pump out 30 reps with a light weight… Trust me, the pump is worth it.”

These are not the words of an enlightened man but rather my first experience of Kaatsu or Blood Restriction Training. Brought to my attention by a training partner whose grasp of science is not always the strongest, Kaatsu training has grown in popularity over the last decade. While my friend’s description may seem appropriate at first glance, there is quite a lot more to this training system than first meets the eye.

With this in mind today’s post seeks to answer three simple questions: what is Kaatsu training? How was it created? And, perhaps most importantly, should you try it?