Thank you Rabbit, my husband is/was also very fit, playing footy 2 x a week at 53 years of age, however we are 3 months in and treatment has taken its toll on his energy which is resulting in weight/muscle loss. He is keen to exercise (non impact) but energy is super low although it does seem to be improving. We will keep walking, eating well and hopefully things will improve as he loves cycling/walking etc.,
Thanks again for your insight, this forum is super helpful.