Anybody good at physics??

Just out of curiosity...if all things being equal, how much could a person improve simply by losing weight. Is there a formula that could properly express this.... Any thoughts??? My thoughts are: no way. There are too many factors at play here. If your weight decreases obviously you will require less energy to move you through the water from a pure F=ma standpoint. The other factor, though, is how your weight (or body composition) affects your form drag in the water. A higher body fat percentage will make you ride higher in the water, so having that additional weight is not inherently a negative like it would be in land activities like running. So you're kind of working on both sides of F=ma. Lowering your mass will require less force, but it's unclear how much force will be required to overcome drag at your new weight.

Just out of curiosity...if all things being equal, how much could a person improve simply by losing weight. Is there a formula that could properly express this.... Any thoughts??? My thoughts are: no way. There are too many factors at play here. If your weight decreases obviously you will require less energy to move you through the water from a pure F=ma standpoint. The other factor, though, is how your weight (or body composition) affects your form drag in the water. A higher body fat percentage will make you ride higher in the water, so having that additional weight is not inherently a negative like it would be in land activities like running. So you're kind of working on both sides of F=ma. Lowering your mass will require less force, but it's unclear how much force will be required to overcome drag at your new weight.