After a few more days Jake began his training to run the marathon, in the first week he intended to run 10 km and then increase 10 km after each week, so after a month he would be ready to run a marathon.
The system said that Jake could run up to 50 km with his current resistance statistic, but the speed would be less than average to run a marathon with chances to win.
With that Jake figured he could run fast enough to win for 30 km, so he would need to use a stamina bar and could finish the marathon with energy after all his problem was that his muscles could not withstand the distance and intensity of the race.
If he ran for 50 km at medium speed then his muscles would have to be able to run for 45 km at a slightly higher speed, so first, he could put his body in a position to withstand the intensity of the race and the great distance.