Started C25K in july 2017, done great til November when overwhelming tiredness turned out to be anemia, couple niggles but lost weight, felt great. Had to pause while tablets kicked in, restart January I decided. Well niggle got worse. Ok sitting or standing just everything else hurts. Dr says it's a trapped nerve & to rest?! So I'm paused again. Just paused not stopped & I can still walk gently. 2018 - not giving up!