Scientists of letsrun, what do you make of this?
Canadian running wrote:
The researchers studied forty men and women aged 20 to 30, who were divided into two groups. The first group was made up of participants with a history of COVID-19, while the second group did not. Both groups were tested for their running kinetics using a variety of methods. Results indicated that COVID-19 individuals showed greater peak vertical ground reaction forces (GRFs) when their heels contacted the ground, greater peak mediolateral GRFs during push-off and a shorter time to reach peak of vertical GRFs at heel contact. They also experienced lower activity in their vastus medialis (the small quad muscle that inserts into the upper border of your knee) during the stance phase of their stride and in their gluteus medius (the glute muscle on the side of your butt) in the final phase of their stride.
Runners who have higher GRFs are less stable, which puts them at greater risk for running-related injuries. The results of this study indicate that runners who’ve had to spend time in isolation, then, may be more at risk for injuries when they return to activity.
Actual study:
https://www.sciencedirect.com/science/article/pii/S0966636221005804article on study:
https://runningmagazine.ca/sections/training/injuries/if-youve-had-covid-19-your-running-kinetics-may-have-changed/