I've been doing F1 for 9 months now. Initially repeating each element twice a week. This felt fine until the reps and sets increased to a level where the endurance kicked in. I started to feel tired consistently so I reduced the training frequency to each element every 1.5 weeks. I then had a plateau for a bit and just wasn't progressing, so I backtracked a few steps to make sure I am getting full contraction and planned to start moving forward from there but it just hasn't happened. This process has taken many months and I'm still on PE1 for nearly all elements. Christmas caused a break in consistency for a week and then I got the flu 4 weeks ago and just felt too weak to train so did nothing for 2 weeks. I have been trying to find some consistency for the last 2 weeks and am only finding consistent failure. I just feel tired all the time. I would say that this fatigue has gradually been building as the endurance of each element has increased. It really feels like the nervous system is not recovering. I just don't know how to proceed. I am wondering whether my diet is a limiting factor. I don't yet have the thrive course but I am keeping things simple with making sure I drink enough water, cut out sugar and eat about 100g of protein per day.
If anyone has advice on how I can proceed from here I'd be really grateful. More time off, less frequent workouts?