Sorry to hear about your family member having cancer. Taken from personal experience cancer sucks! I am now 9 years out! Woot!
When I had it there was nothing I could do during my sessions that made me have any energy. I walk walk to the bathroom and walk back and have to nap because I was exhausted. Everyone has a different case. What works for this person may not work for that one.
I really hope your family member wins their battle against cancer! I am praying for them.
1982 Honda 185 My work horse
1985 Honda 125 kids love it
1984 Honda 200S My main ride