What Viral Fitness Challenges Get Wrong: 75 Hard, 12-3-20, and More

Viral online exercise challenges, like the 75 Hard or the 12-3-20, might get you in shape in the short run, but they may not help you build sustainable healthy habits. https://static01.nyt.com/images/2024/03/11/multimedia/11FITNESS-FAD-FAULTS1-phjc/11FITNESS-FAD-FAULTS1-phjc-mediumSquareAt3X.jpg