for Stuart Barr, 39, and Nicholas Davis, 32, who both live in Cumbria a part of the world not exactly renown for its mild winters. They often run 10-13 miles together at about 4am, a particularly bleak time to run when the northern climate is blowing wind
-90 seconds then increase the next interval to two minutes. Repeat this pattern up to a five-minute interval, make the next interval four minutes and continue down the pyramid for a 1/2/3/4/5/4/3/2/1 pattern. Finish with 10-minutes of steady running at 40
