Exercise - Shutter speeds

I set the camera on tripod taking series of photos of my husband running across the frame .. (poor him)
The camera was set on Tv mode so the exposure was automatically set the same.
The shutter speed was set from 1/1000, 1/800, 1/640, 1/500, 1/400, 1/320, 1/250, 1/200, ..., down to 1/15. The slowest shutter speed i could see that could freeze the movement was at 1/250 sec. at 1/200 I could see the photo starting to go blur especially from legs area because of having more movement than the upper body.