Not OP, but a while back I ran weekly for months outside with no issues. It got hot, I ran two miles inside on a treadmill and got the first shin splints in my

Not OP, but a while back I ran weekly for months outside with no issues. It got hot, I ran two miles inside on a treadmill and got the first shin splints in my life. I hear from other runners that treadmills can hurt your form because you run differently on them than on solid ground. Try running off a treadmill and see if it helps.