Okay so lately my muscles have been jerking, but it's not a lot. My leg will sometimes twitch randomly and it happens a few times but stops so i completely ignored it figuring that these things happen to everyone. the past few hours though my upper thigh muscles have been twitching nonstop. It's getting ridiculous to the extent where I can't concentrate on anything else. Is this normal? I am a 15 year old girl who is extremely athletic...I work out twice a day. whether it is weight lifting, intense volleyball practice, running or swimming...I am always active. I guess I've been under a bit of stress too because varsity tryouts were recently. does anyone know if this is normal?