for the Flora London Marathon, and was willing to train harder to get there.The core of his programme was Yasso 800s. Since Underwood needed to run a 3:30 to guarantee a place, he ran his Yasso 800s in 3:30, building up to 10 of them in a single work-out, taking

calls the ‘London bug’. He wanted to achieve a ‘good for your age’ time for the Flora London Marathon, and was willing to train harder to get there.The core of his programme was Yasso 800s. Since Underwood needed to run a 3:30 to guarantee a place, he

, sloshy feeling in your stomach.Sports drinks are better than water, but they won’t stop hyponatremia. Don’t glug fluids immediately after the marathon. This is when, according to a 2003 Flora London Marathon report, the risk of hyponatremia can be high