Everyone at some poiint has complained about going up a hill.
The reason for this is that they are tough. Used correctly and they will leave you walking like John Wayne for a few days.
This is why I love them. They hurt, they bring fast results and they don’t need much time to finish you off.
But [...]

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Here’s some evidence as to why interval training must be a regular, tough, sweat-fest of a session on your training timetable!
This really is just some of the piles of research I have next to me!
Let’s look at some answers to sceptics, aerobics fans and those who ‘don’t have time’…

But I want to improve my stamina [...]

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