Sinking hips during recovery in fly

If I try to analyze preparation for the first kick (the moment that worried me initially) what forces do we have? Downward forces: 1. gravity 2. upbeat of the second kick 3. hands leaving the water Upward forces: 1. buoyance. But since buoyance decreases at this moment since the arms go above the water, this force's overall contribution is more downward (it has negative change). 2. flow dynamics. The whole body is in "uphill" position after the pull and before the recovery and since the water flows towards the swimmer, water tends to lift the swimmer up. I like your reading of the facts, and I agree to a large extent. I'd add the following element to your upward forces' list. - Forward momentum The greater the velocity (forward) the less you sink. But this is probably what you meant by flow dynamic. Yep, I think I just understood what you meant. I particularly like the fact that you included upbeat of the second kick. Additionally, rotation of arms from shoulders (beginning of the recovery - upsweep), creates most probably counter force moment in the shoulder to the rest of the body which tends to rotate body counter-clockwise (when watched from the right side), which also brings hips down. Yep. I see what you mean here and I agree. However, the portion preceding this phase is believed to be the most propulsive. Therefore the exit's negative impact is probably very little. I didn't know you knew about principle of physics that much. I voluntarily omitted one element that also brings you down because it does so through an esoteric weight shift, wait let me explain. On catch, if you press the water down, that brings the hip down. You get the same effect as if you were wanting to push against the side of the pool to exit and go home. But in your case, I'm absolutely convinced based on the timing during which the hip sinkage occurs that it has a lot to do with the leg recovery being too sudden and hard. Thanks for the no-arms drill. I actually used this drill (I posted this in one of my previous posts on my blog). Although I posted above the water video, probably more interesting would be underwater one. I'll make it and post it. Would you be kind enough to post a link? I keep claiming the paternity of this drill, being aware that there are certainly over 20 coaches that invented it (I'm not pretentious enough to believe that I'm smarter than other coaches). However, I'm yet to see an execution with arms in the front and total respect of breathing and kicking patterns. Thanks

If I try to analyze preparation for the first kick (the moment that worried me initially) what forces do we have? Downward forces: 1. gravity 2. upbeat of the second kick 3. hands leaving the water Upward forces: 1. buoyance. But since buoyance decreases at this moment since the arms go above the water, this force's overall contribution is more downward (it has negative change). 2. flow dynamics. The whole body is in "uphill" position after the pull and before the recovery and since the water flows towards the swimmer, water tends to lift the swimmer up. I like your reading of the facts, and I agree to a large extent. I'd add the following element to your upward forces' list. - Forward momentum The greater the velocity (forward) the less you sink. But this is probably what you meant by flow dynamic. Yep, I think I just understood what you meant. I particularly like the fact that you included upbeat of the second kick. Additionally, rotation of arms from shoulders (beginning of the recovery - upsweep), creates most probably counter force moment in the shoulder to the rest of the body which tends to rotate body counter-clockwise (when watched from the right side), which also brings hips down. Yep. I see what you mean here and I agree. However, the portion preceding this phase is believed to be the most propulsive. Therefore the exit's negative impact is probably very little. I didn't know you knew about principle of physics that much. I voluntarily omitted one element that also brings you down because it does so through an esoteric weight shift, wait let me explain. On catch, if you press the water down, that brings the hip down. You get the same effect as if you were wanting to push against the side of the pool to exit and go home. But in your case, I'm absolutely convinced based on the timing during which the hip sinkage occurs that it has a lot to do with the leg recovery being too sudden and hard. Thanks for the no-arms drill. I actually used this drill (I posted this in one of my previous posts on my blog). Although I posted above the water video, probably more interesting would be underwater one. I'll make it and post it. Would you be kind enough to post a link? I keep claiming the paternity of this drill, being aware that there are certainly over 20 coaches that invented it (I'm not pretentious enough to believe that I'm smarter than other coaches). However, I'm yet to see an execution with arms in the front and total respect of breathing and kicking patterns. Thanks