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
140, but I think if you're an accomplished runner you can do more. – Mitchie MooI'm now 29 weeks pregnant. I've continued to cycle to work every day, and I will be taking part in a 20-mile sponsored walk in Snowdonia in just under two weeks' time. My
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
temperature above 101°F could increase the risk of birth defects. So make sure youre staying cool enough, and if in doubt, take your temperature after a run. If its over 100°F, youre probably overdoing it. Also, skip that post-run soak in a hot bath.6. You
