>>76548226
>sounds a lot like electrolyte imbalance.
Could be. I haven't been doing a great job of drinking water during the week so I'll work on that.

My long runs I have a hydration vest with water in it and then I have a bottle of powerade. I take a small sip of water every mile, a nip of Powerade and 1/3 of a energy gel at mile 4 and again at every 4 miles after that.

Ironically enough I set a new PR up until 12 miles and then I completely crashed out from there but the majority of that is training or lack thereof.