The New York Times has revised an online headline after publishing an article in which exercise specialists warned that a viral fitness challenge promoted by Health and Human Services Secretary Robert F. Kennedy Jr. and Defense Secretary Pete Hegseth could lead to injuries. The workout—completing 100 push-ups and 50 pull-ups as quickly as possible—has circulated on social media since the two men competed at a Pentagon gym last week. In the piece, a Canadian trainer said the regimen can cause “serious muscle strains or tears” for people who have not built up sufficient strength and mobility. Other experts quoted by the newspaper urged participants to adopt progressive training plans and to recognise that exercise, while beneficial, is not a substitute for proven public-health measures such as vaccination. The Times quietly shortened an original headline that began with “Experts caution” after critics on social platforms accused the paper of overstating the risks and downplaying Kennedy’s push for fitness. Supporters of the challenge dismissed the warnings as excessive, while sports-medicine physicians quoted by the Times maintained that sudden, high-volume body-weight workouts can be hazardous, particularly for older or sedentary individuals.