This kind of fielding drill has been around longer than I have. In and by itself from a cold start is NOT, I repeat NOT the proper way to conduct this.
Field pre-workouts are the norm, along with inspecting the field surface that players will be running over is standard stuff. Why inspect the field? running in any direction is safer with avoiding holes, toys and other items left by the public.
In addition, exercises that focus on the shoulders are usually part of the exercise routines.
By the way, some coaches - including yours truly, would use a drill like this to see who’s rested, in shape for that day’s workouts and so forth. Those players who look exhausted after a few runs out, are prime candidates for hearing … " hey scooter… meet me my office after these sessions…"