I know you're in ED recovery so I'm hesitant to suggest this, but try upping your carb intake a little. I had the same shit and going from 250 to 400 g carbs on my cardio days helped immensely. I ate a loaf and a half of French bread yesterday amongst other foods (also did an hour and a half of intense cycling). I'm also twice your size and twice your age, so YMMV. Eating mad quantities of carbs also makes for some great discrete shitlording opporotunities since the keto craze has been spreading amongst the hammy hams I work w/.