This article was taken from the February 2015 issue of WIRED magazine. Be the first to read WIRED's articles in print before they're posted online, and get your hands on loads of additional content by subscribing online.
Armed with five new activity-tracking wristbands, WIRED put in the laps with personal trainer and Team GB Olympic sprinter Laura Turner, to see which wins in the race to get fit. WIRED asked Turner to compare the vital statistics from each, measure their accuracy with a few circuits of the Thames Valley Athletics Centre, and put WIRED through its paces.
This article was originally published by WIRED UK
