“Refraining from Strenuous Physical Activity for Two Weeks After Vaccination"
https://www.moh.gov.sg/news-highlights/details/expert-committee-on-covid-19-vaccination-statement-on-skin-reactions-after-vaccination-and-refraining-from-strenuous-physical-activity-after-vaccination
要给身体一些时间来适应受损的心肌。