So I completed couch to 5k back in march which was good and my first 5k after completing took me just over 33 minutes. I then set myself the aim to try and complete it in under 30 minutes. I thought that continuous practice would make me better like anything. I managed to knock 30 seconds off of that eventually. However recently I have slowed down so much. where I used to be getting closer to 6 mins per km, I am now up to 7 and even 8 mins. I cannot get anywhere near 32 minutes. One run was 37 mins! I have tried increasing distance and interval training but nothing seems to be working. Any advice from anywhere?