Mountain biking 3:12:00  41.0 km (4:41 / km) +840m 4:15 / km
First ride with C after his accident. Plan was an hour but one thing led to another on an adlib ride that worked out to be a great route, including 3 x BKB. 80% of mud was frozen making for ideal if bone shaking conditions. C wiped out in front of me and fortunately neatly rolled over, rather than going back to A & E. Back was fine for 2 hrs, then tightened.