My kicking needs work

I did manage to get my swim work out in this morning before work. Ten laps, I have tried for the second time this week to do laps without the float between my legs - much harder.

I was told that it would help if I kicked with my whole leg from my hip rather than just kicking from my knee down. I was told not to lock my knees,but keep my legs straight and kick from my hips. I am greatful for the sugestion - I need all the help I can get.

I certainly don't remember swimming being this hard many years ago ;o)