Noticeable effects on energy during exercise?

I am type 2 taking metformin with BP tablets and statins.

I started running regularly about a year ago and it seems to have had a positive effect on sugar levels and a less certain effect on weight which is borderline "overweight". I now run 10k about 3 or 4 times a week.

That's all just background. What I'm curious about is that my pace is still quite slow compared to others about the same age on a running forum that I use and it is not really improving. I wondered if anyone with a medical background, or similar, could advise whether the fact that my natural insulin is not working 100% could reduce my available energy significantly even when my blood-sugar is normal? Or is it just my age or perhaps weight (61)?

I'm not bothered about the pace as I run alone and don't expect to win any races. I'm just curious about the insulin/energy question.

Cheers cameraman

I think you are right about what many others say about pace but when you look at race results you can't really exaggerate the chips. As you are a runner you will know that 10.15k in 75 - 78 minutes is not great after a year of running.

I know that the big benefit is just the exercise and the slower the pace the longer the exercise session. I keep telling myself that that's the only reason for running now but the old competetive demons keep creeping up on me.