Webinar 33, this video may be of interest to many:
Webinar 33: Dr. Noah Greenspan: “Exercise in Health and Disease”: An Evening with Donna Wilson – Pulmonary Wellness & Rehabilitation Center
Breathing correctly is so important.
Always exhale on the exertion (20 mins in).
Chair squats, clench buttocks and breath out .. 50 mins in
excellent information on correct breathing in this video, well worth viewing again even if you have seen it before, I think we do forget things, especially if PR was a long time ago.