Since lung cancer surgery 2 years ago I have struggled to recover even 75% of previous form. Particularly i have lost power in the hills. I am reluctant to exceed 80% of max HR so I have so far avoided HIIT. There are conflicting opinions about abdominal breathing, through the nose rather than the mouth and so on.
I would be very interestd in comments based on experience.
I would be very interestd in comments based on experience.