If you're running a marathon this spring, you're about to enter the most critical – and difficult – four weeks of training, when 1) your weekly mileage is at its peak; 2) your motivation may be flagging; and 3) you're most likely to get sidelined
time goal. Most marathon-training schedules require running five or six days per week, with total mileage of 40 to 60 miles. Two of the most successful training wizards think that's too much for many runners. The marathon-training programme developed
