I started jogging about 18 months ago. My intention wasn't to lose weight but to get some kind of regular activity in for general fitness now that I work mostly from home. However I knew that my weight was the top end of "healthy" so I figured losing a bit would be a good side effect.
I only check my weight rarely but to my surprise it has simply gone consistently up since I began running. At first I put this down to increased muscle mass over fat. But it just kept goikg up and I've now put on about 6.5kg in those 18 months.
My running is not particularly arduous. I do 5k, on average twice a week. My usual route does include some climbs but nothing really vicious and I can now run it in about 28 minutes (I'm almost 50). I can do it im 26 minutes on the flat.
All my clothes still fit and I haven't noticed my waistline expanding. Indeed I've got the occasional complement from people that I'm "looking well". Is it really possible I've put on all those kilos purely from muscle, or am I also likely gaining fat somewhere? How can I tell?