Doctors would tightly bind the chest to reduce pain from broken ribs. Then they found that the restricted airflow greatly increased the likelihood of developing pneumonia.
I'm old enough that this was done to me in eighth grade. Then I had a dance recital that weekend. Passed out on stage from lack of airflow. A most humiliating and awkward moment in my young teenage angst years.
I gave up dance lessons shortly thereafter.
__________________ Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.