By following scientific training methods, many of the runners can now finish halfmarathons or even full marathons.

"We provide different runners with different advice and plans depending on their level of fitness and whatnot," added group leader He.

"Doing a half-marathon is really not a challenge to many of our runners. But based on each runner's situation, we tailor our running plans for them. Some newcomers can get carried away and try to run too much too soon, but we guide them to exercise scientifically."

Apart from the regular weekly training, the group also organizes special events from time to time. For instance, to celebrate this year's National Fitness Day and pay tribute to the Paralympic spirit, the members of Running in the Dark in Beijing started a running challenge on Aug 7 in order to set themselves new goals.

"Sometimes I joke with them and encourage them to try harder so that they can have a chance to compete in the Paris Paralympics," said He.

"But the encouragement is mutual. As we form closer bonds with our friends with disabilities, we understand what wonderful and wise people they are.

"With their disabilities, they have many difficulties to overcome in their daily lives, and this requires great courage.

"So now, when I face some difficulties in my life, I always think of them. If they can manage to overcome all the challenges, we have no excuse to back down."