Whether it is clips versus flats or analogue versus e-bike, there seems to be a lot of division in mountain biking. And while most of it is clearly manufactured, one thing we can all agree on is that arm-pump is a pain.
But what exactly is arm-pump? If the doctors who perform carpal tunnel release surgery are to be believed, it’s caused by constricted blood flow in your forearm which leads to a build-up of metabolites in the surrounding muscles with an associated loss in grip strength. And while we’re not promoting surgery to deal with arm-pump here, the mechanism appears to be sound as it is not that