The best way to slowly regain your stamina is to exercise at a level that you can sustain, day after day without crashing. Get a good nights sleep
I also like to suggest getting in enough healthy fats, to reduce the inflammation in our body and to give us long-lasting energy
Some insurers may cover them completely
Kluck R, Muller S, Jagodzinski C, Hohenfellner K, Buscher A, Kemper MJ, Oh J, Billing H, Thumfart J, Weber LT, Acham-Roschitz B, Arbeiter K, Tonshoff B, Hagenberg M, Kanzelmeyer N, Pavicic L, Haffner D, Zivicnjak M (2022) Body growth, upper arm fat area, and clinical parameters in children with nephropathic cystinosis compared with other pediatric chronic kidney disease entities