While I agree with the hypothesis that exercise can increase survival, it seems like this study is incomplete. They found that patients who exercised less were in a higher risk group. Essentially saying that patients with worse PH (more shortness of breath and fatigue) exercised less. Makes sense, right? If you’re tired all the time, you’re going to move less.
What they should look at is whether this regimen of exercise can change a patient’s risk status over time.
Do you agree? Have you read any other studies that look at the impact of exercise over a longer period of time?