Laki, you should honestly fit into your regimen for upper body and core anaerobic exercises for strength and flexibility. These exercises help keep you able to do somewhat strenuous lifting and range of movement in later ages and even burns more visible fat around the waistline, upper chest, and arms by refining them with muscle. You don’t need to gain visible muscle, just keep your body able and lean.
I have (had?) an ED , and can tell this is very obviously a relapse.
I’m not going to tell you what to do since it won’t help, but I will inquire if you talked with a physician before doing this?
Screw the damn marathon, I am getting a lot of red flags from this and am kinda worried.
Seconding talking to a physician
and a professional dietician and body trainer to make sure your doing the “right” exercises to a reasonable level.
Furthermore, working on upper body & core exercises like weightlifting means you can start bulking up on meals high in protein.