Latency spikes when moving. Fine standing still?

I have no idea... When I'm standing still my sending and receiving sit at ~50, but when I start running I immediately spike up to 400+

It causes slight jittering in my screen, too. Very slight, but enough where I can definitely notice it. I'm watching my fps while this happens and it remains 50+ and NEVER dips.

Maybe I'm not understanding how they measure connection speed? I'm just trying to figure out causes for the screen jitter since it's not an FPS drop... It seems to only even happen after I've done an extended amount of running.

Help :[

Edit: So it starts off with my sending spiking to 400+ then gradually my receiving climbs and my screen starts jittering at 1000+, but my sending stays at 400-500.

Limiting to 30 FPS seems to have fixed the jittering, thank god. Also, apparently the more sending/receiving the better. That's confusing... Thanks everyone that posted to my thread was mega helpful, I know where to come next time I have a problem :D! *sarcasm*