Ugh... I'm going to take a moment to be a negative nelly... but I'm really discouraged with running at the moment. I started running in 2014, was always slow but saw improvements in my speed through 2016. My first half marathon was 2:57 and my half marathon PR in December of 2016 was 2:50 (about 13 minutes per mile average). I also had a 5k and 10k PR in 2016 so it was a good running year.
But since then, I've just been getting progressively slower and slower and I'm not sure why. I didn't train consistently in the beginning of 2016 but starting in June 2016, I upped my running from 3 times per week to 4 times per week. I do speed work and I run hills. I strength train. And I still just keep getting slower. I started training for my first marathon (WDW 2018) and training went fairly well. Got in my 20 miler and everything. But I was swept a bit past mile 20 since I was behind pace due to knee problems. My half marathons last year were 3:10 and 3:19, a pretty drastic difference from the year before.
I had some tendinitis at the beginning of this year after the marathon so I haven't run for 4 weeks. I tried again this past weekend, just 2 miles, and it was an average of 17:30 per mile. Plus my heart rate was high. 40% was in zone 4. I can walk faster than that! I don't understand why I can feel like I'm working so hard but barely moving forward. It makes me wonder if there's something physically going wrong that I'm unaware of. I do have thyroid problems but I've been on medication for that for a long time and those numbers are normal on my blood tests. My most recent blood test did show high cholesterol and low vitamin D. I have started taking a Vitamin D supplement.
I guess I'm partly venting and partly looking for any tips. Can anyone think of other reasons that people may have a drastic slow down like this? I did turn 40 last year and I had gained some weight (7 pounds since my half marathon PR). Obviously I am working on losing weight, mainly for the purpose of getting my cholesterol down. I guess I should probably re-evaluate my running form too since clearly, the effort I'm putting in is going somewhere but it doesn't sound like it's going forward. It's just frustrating to feel like I'm working hard and doing the right things but continuing to get slower, to the point where I can walk faster. And if I can walk faster, what's the point in running?