Having done Couch to 5K, I can say 9 weeks is too short. I understand that a longer, more realistic time frame would mean fewer people will attempt it, but such

Having done Couch to 5K, I can say 9 weeks is too short. I understand that a longer, more realistic time frame would mean fewer people will attempt it, but such quick growth makes injuries more likely. Lungs and heart adopt faster than ligaments. I ended up hurting my knee, which set me back by a couple of months.