"Chief of Naval Operations Adm. Mike Gilday was running on the Washington Navy Yard base, where he lives, Aug. 10 when he “fell ill,” according to the Journal, which cited “several people familiar with the matter.”
Gilday was helped by a passing Marine and was taken to his physician, the Journal reports."
https://www.navytimes.com/news/your-navy/2020/09/29/report-cno-fell-ill-had-heart-surgery-last-month/