I'm 54 and have been doing C25K since April. It's taken me so long because of hurting a muscle in my backside (sorry!) and then family illness.
My right knee for some years occasionally makes going up and down stairs difficult. It sort of objects to me putting my weight on it whilst climbing up the stairs. No swelling, no pain at the back or the front, just sometimes make me wince if I kneel awkwardly on the R side of the knee. It doesn't feel like I would imagine arthritis to feel like. However, then it all goes away and I forget about it. I had just decided that the running must have fixed it when it started again 24 hours after run3 of wk8. I'm so desperate to graduate as I felt finishing was now within my grasp.
Completed run1 of wk 9 today (Hurrah!) and it felt ok to run on although very slightly tight over the front of the knee by about 25minutes. I'm sure that I should go and wave it at someone but it will take ages to get an appointment and I want to finish this and I want to carry on with the next set of podcasts. Am I being foolhardy?