So I started couch to 5k and things were going well until I met week 4! I'm finding I can only just make it to the halfway point of the program but I can't repeat the runs. I'm running as slowly as I can already so dont think that slowing down is an option. I htought the problem may be the humidity but I've tried running at all times of the day to no avail and always have some water with me. Does anyone have any tips to help me et over this hurdle? I've already read some posts on here but people always seem to be able to fniish the program just struggle three times whereas I'd be extremely happy to finish it once! All help greatly appreciated.