So after failing my job related fitness test in December ( 1st time I’ve ever failed ) and with my big 50 in 3 months I started C25K a few weeks back . I haven’t done any real running for 10 years . Weeks 1-4 were tough but ok , week 5 day 1 was tough but I’ve just done week 5 day 2 and it almost killed me especially the first 5 min run followed by 8 mins. I’m dreading day 3 already and really don’t think I can start with an 8 min run straight away . Any encouraging tips ?