Anyone got any tips/advice for avoiding cramp during a marathon? I'm doing the Snowdonia Marathon on the 29th and suffered badly last year, hamstrings started tightening around mile 18 before finally cramping at 24.
I have read that starting too quickly is a major cause of later cramps. Could be correct as I did start too quickly last year, knew I'd overcooked it at 8 miles and was knackered at Beddgelert. Any advice greatly appreciated!