I know that for me that this was something i had to constantly fight against. I would feel good and then go and do something and then pay for it for a few days. Try not to push yourself too hard in the first little while, pace yourself and your stamina will grow.
Erik

Type and stage of cancer:1st - SCC left base of oral tongue non HPV, T3N1M0 hemi-glossectomy 60 node rem, radX35 carboplatnum &Erbitux X6, Peg tube, lost 55 lbs
2nd - SCC right base oral tongue, surgery, Cisplatin & Erbitux x 16
3rd - SCC right base oral tongue, surgery, hope.