Old thread to be resurrected as i have a question again on it.
This last weekend i was a little way back in a cave at Peacock, playing No.2 man as my buddy knew the lay of the line a lot better than i. So we turn on 1/6ths and proceed out, buddy is happy about my diving (only just finished intro training), but mentioned that i spread my legs a long way when frog kicking. As i cant see back there i cant tell how wide, but it felt comfortable for me. He was concerned that i might lose some power from having my knees/legs outside the slipstream of the rest of my body. I have had my frog commented on as being good and as fast as almost anyone who is going at it with a flutter (like when we are charing out 1/2 mile off the beach to hit the drop off on the SE coast). How wide do you spread your legs on this kick. I think mine must be going outside my shoulders, to possibly a 90-deg angle or so. This is similar to how i do breaststroke kick - only without the rocking to get my head up - my knees seem to stay in that plane quite well with a nice back arch.
So how bad is this for my kick, i seem to get plenty of power without any effort. Another couple of cavers exited just before us on our first dive and i had to stop myself kicking and just drift with the flow to prevent going into the back of them - i was doing 1 kick for about 3/4 of theirs and just enjoying the structures, but on the second dive i knew my buddy was cold so didnt hang around quite as much (no-one ahead either) and put a "little" more leg into the kicks. I seem to use my inner/outer thighs more than my calfs for this kick, really need some more work i feel.