As many as 39 per cent of distance runners may experience a cramp in their calves, hamstrings or quadriceps before they finish a race. While many people blame dehydration, Kevin Miller, an exercise scientist at North Dakota State University, US

Q My quadriceps always cramp up when I run marathons, even though I hydrate well and stretch regularly. Why is this, and what should I do?A Exercise-induced muscle cramps are relatively common among distance runners. Quadricep cramps typically

-to-bike sessions, thus guaranteeing optimum response during racing.Speed kingIt's a good idea to base your brick training on the demands of your next race. Sessions can cover practising race pace; developing aerobic endurance, threshold pace and aerobic endurance