A study suggests that those under age 65 may need no restrictions at all, but more data would help clarify the issue.

Much has changed since the 2013 document came out, with new information on pacing devices, techniques, and more.

While intensity didn’t appear to matter in this network meta-analysis, location did: in-person programs had the most impact.

These documents have become too technical, too inconsistent, and rely too much on expert opinion, Marco Valgimigli argues.