People affected by post-covid often experience extreme fatigue, shortness of breath and high-resting heart rate. For those reasons, exercise was often discouraged—even harmful. However, new research from the Karolinska Institute, published in JAMA Network Open, suggests those guidelines may be too strict. Researchers saw post-Covid patients do just as well as other patients, even though they had more symptoms to start with—meaning they did not worsen their condition during the forty-eight hours they were observed. The study concludes that post-Covid patients can be encouraged to exercise, under supervision, the type they enjoy with appropriate rest intervals in between.