"Sometimes I  just counted my steps, doggedly putting one blistered foot in front of the other."

It was the ultimate endurance test for Jo Martyn, blogger and trainer, but when her colleagues suggested she join their 100k walk, she gained far more that the fitness and the blisters she might have expected. As the 100 voices for 100 years project goes into week 2, we hear heartwarming story about how achieving a challenge can change everything