Originally Posted by MyData
Muscular atrophy? Does that mean that the muscle tissue actually 'wastes' away so that there isn't as much remaining? That would make sense. So I guess if I restart training then overtime I should develop new muscle mass and this will help me to be able to run distances again.
Yep, simply put.. works like that
EDIT: remember that training alone won't build muscle... proper "diet" is also necessary.. i.e. lean protein and complex "slow release" carbohydrates (bit of an over-simplistic view, but a good start I reckon...)