It's been a few weeks since I graduated the C25K program, and I'm still running regularly which I'm really pleased about. However, I don't know if it is just my specific route (mostly downhill/ some flat for the first 15 mins and mostly uphill / some flat for the second half), but when I get to about 20 minutes, I go from feeling pretty good to sapped of energy. I always push through to the end and don't feel half as puffed out at the end as I used to upon finishing, but I just wondered if anyone can give some insight into how long it might take before I will able to comfortably run 5k without knackering out three quarters of the way through
Thanks