and maintain a reasonable pace, you still only have about 2,000 calories worth of glycogen stored in your muscles – enough to get most runners to about mile 18 or 20," he says. "As glycogen reserves are used up and fatty acid metabolism increases, your heart

considerably during the very hot weather in July, as it's not recommended to overheat whilst pregnant. My pace remained more or less the same, although I was careful to listen to my body and ease back if I felt tired. Being well hydrated both before and during

established. You should certainly be trying to include some speed sessions in your training, even if it’s only some 100m strides. It may also help to train with somebody faster every now and then, to keep you from falling into one slow pace. Running

my mileage and practised running above 14,000 feet, but still I'd limped home after aggravating an old Achilles injury. Today I was ready for a charmed third try. I was fit, healthy and confident of a top-10 finish. Maybe I'd even break three hours

my mileage and practised running above 14,000 feet, but still I'd limped home after aggravating an old Achilles injury. Today I was ready for a charmed third try. I was fit, healthy and confident of a top-10 finish. Maybe I'd even break three hours

Warming up before a race or a speedwork session should mean more than just a 10-minute trot. Gentle running will get the blood flowing, but to avoid that heavy-legged sensation in the opening mile of the race, or the first few repetitions of your

....hit the marathon wallWhat's going on? The energy to power your muscles comes from a store of about 2000 calories worth of glycogen in your liver and muscles, which is enough to energise about 20 miles of running. When you run out of glycogen, your body is forced

Keith's solution: Self-talkRunners need to learn to manage their internal dialogue. The average person has 10-15,000 thoughts every day, and you need to get as many of these thoughts working for you as you can.There a couple of techniques you can try

without them." Hereare the key core muscles you need to run. Here's how your core works for you on the road...1. SpeedAs you extend your stride or quicken the rate of your leg and foot turnover when you're trying to pick up the pace, the lower abs

Painful, paralysing and PB-unfriendly, cramps can strike at any time. "There's no one definitive cause," saysDr Steve Ingham, head of physiology at the English Institute of Sport (eis2win.co.uk). Research in the Muscle & Nerve Journal shows