How to build up strength from the fatigue?

[breakdown19]

I am so tired
I have tested negative but still feel
Completely shattered
Sleeping during the day etc
Have no other real symptoms but omg just so tired.

What do I do to build up my strength?

I don't have any advice. I'm just coming to the end of my isolation and feel the same way so looking for tips.

I’m 22 months into long Covid fatigue, OP.
It’s important NOT to rush back to exercising etc, or you will trigger a relapse and spend days stuck on the sofa trying to recover.
Start very slowly, and test out where your current limit is. It might be anywhere between 100 yards and a couple of miles, but this is your max without triggering relapse.
Stick within this limit for a week or two, then cautiously start extending it. Always have at least one rest day a week. I was breathless and fatigued at 100 yards a day for the first year, extended to a mile a day after the next six months, and have just reached a one off 5 miles this week.
You may be a lot quicker than this, especially if you don’t develop long Covid and just need a normal, gradual, post acute viral infection recovery.

Gosh @Babdoc that is full on

I only tested positive last week, was fuzzy and realised I had a sore throat

I often have headaches so that hadn't struck
Me as unusual

But now I am just so knackered
I am overweight (bmi 28) and would like to get in shape at some point this year but can't even imagine getting off the sofa atm

I’m sure you will get there, OP! You are only marginally overweight, and acute Covid itself burns off weight. I lost ten pounds in the two weeks before being hospitalised.
Just be patient and don’t rush to go jogging/running etc. Start with gentle regular walks and build up in easy stages.

Very slowly. Don't push yourself, listen to your body and rest. Don't rush back to work if you aren't well enough.
I still had to have a lie down after a shower at 3 weeks.

Take it slowly. I have had a bit of a setback even though I have been VERY cautious about returning to exercise, doing at a maximum half of what I would normally do in a session and not doing as many sessions per week. Feeling fine during the sessions, but still had horrific fatigue last week which prevented me from doing any exercise at all.

It’s normal after any virus to feel fatigued for 2-4 weeks in my experience, so I would just keep resting for at least another week. The last time I had flu it took 4 weeks to feel completely better.

OP I was the same for four or five weeks after Delta, then suddenly improved. I'm not saying everyone is the same if course, but don't automatically despair because you feel so awful at the moment. Rest as much as you need to.

A good B12 supplement and iron supplements won't do any harm, lots of water, lots of fresh fruit and veg and protein, and avoid the booze.