To be fair I was well rested and since the heatwave is over I didn't have to fight the environment as much (although it rained and I was properly soaked and heavy).
Also I looked up how to properly move while running yesterday and I realized that I had to include my upper body more into my movements. Using my upper body more is still a thing I have to consciously decide to do but I'm really excited that it'll soon go into my muscle memory and I'll naturally move better.
Is that just swinging your arms more or your torso as well? One video I watched recently said too much arm swing can also be counter productive so it's a fine line it seems.
I think I'd describe the movement more as shoulder based. Beforehand I feel like the center of movement lied more in my elbows but as I said it wasn't really a conscious act.