.Keeping a detailed training log can help you gauge your personal training threshold. Record your weekly mileage and how you feel after your runs. Look for patterns. For instance, you may notice that your knees ache only when you're logging more than 40 miles

others. The 13 veterans among those 21 runners improved on their most recent times by almost 20 minutes. Even more remarkably, they did so with a daring new marathon-training programme from Furman University in Greenville, South Carolina. Daring because

further. (Isn’t 26.2 miles far enough?) Instead, they want to improve their speed endurance – the pace at which they can cover substantial distances.Fortunately, you can have it both ways. You can follow training plans that build the length of your long

This extract is from The Runner's World Complete Book of Running by RW USA Editor Amby Burfoot. You can now preview it, free, for two weeks without risk or obligation. All running programmes for beginners are the same: they move you from walking

further. (Isn’t 26.2 miles far enough?) Instead, they want to improve their speed endurance – the pace at which they can cover substantial distances.Fortunately, you can have it both ways. You can follow training plans that build the length of your long