Every year thousands of athletes from across the globe flock to Boston to run the cityÕs marathon, known worldwide as the ultimate test of stamina and endurance. But how do you run 26 miles if you have trouble making it around the block? With good coaching, discipline, and lots of group support, as NOVA shows when it follows 13 sedentary people through a nine-month regimen designed to prepare them for the grueling Boston Marathon.Every year thousands of athletes from across the globe flock to Boston to run the cityÕs marathon, known worldwide as the ultimate test of stamina and endurance. But how do you run 26 miles if you have trouble making it around the block? With good coaching, discipline, and lots of group support, as NOVA shows when it follows 13 sedentary people through a nine-month regimen designed to prepare them for the grueling Boston Marathon.