How much does body weight effect swimming speed?

Former Member
Former Member
This has been something I've wondered the last few years. I used to be a college swimmer, fit and trim, but the 10 years since then I've drank my fair share of beer and ate plenty of cheeseburgers. Just curious what peoples' take is on how much the extra baggage really effects swim races. I don't really fit the swimmer mold anymore. I'm 31, 6'2", and 270lbs with a huge beer gut. I got some strange looks since the meet i was in recently was a USAS meet and I outweighed my competition by 100lbs in many cases. My first race in about 5 years i went 23.4 in the 50y free. I didn't expect to be that fast at this weight but at the same time I almost wonder if the added intertia is helping me more on the start and turns. Followed it up with a low 52 in the 100y free but I had a horrible reaction on the start and incorrect pacing. I think if i raced again today that'd be deep in the 51 range. For reference, typical non-taper times for me in college were in the low-mid 22 range at just a tick over 200lbs but I was obviously a lot stronger, younger, and doing a TON more yards at the time, that's why it makes me wonder just how much the weight is actually holding me back. How much time do you think I stand to drop if i were 50lbs lighter? Could it be a measurable difference or something just slight? I guess I ask that to see if it'd be worth my while to drop that much weight quickly by dieting in addition to the swimming i'm doing. I don't really like dieting, and i generally eat what I want, when i want. Not gorging myself at every meal doesn't really seem to fit into my lifestyle :blush: Anyone have a similar story? "I dropped XX lbs and went XX seconds faster because of it." Maybe it's an immeasurable, but I thought I'd ask for opinion anyway. I'm hoping it doesn't turn into a "to diet or not to diet" discussion though.
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  • Former Member
    Former Member
    Somebody once said the rule of thumb is improving 1 sec/50yds/#10 lost. Don't you wish! Your increased cross-section/profile in the water will increase drag and slow you down -- but if you float higher it could almost net out. I believe mass (weight) will help you travel farther ("carry well") underwater on starts. If your leg extension strength has also improved, you should also carry well underwater on turns. Heavier people need stronger legs too, just to walk around for daily activities. But with a larger midsection you probably won't be able to get as tight a tuck on flipturns, making them slower. I hope you keep tabs on the important numbers - blood pressure, cholesterol, heart rate - not just your time for a sprint 50. You're fast, but it would be in your interests to ease off if you're risking stroke/heart attack during very intense exercise. You bet I wish that was a true formula haha. I agree with the legs comment for sure. I've felt that my pushoffs are definately a strong point for me and especially my grab start. I typically get out to the flags on the start on 32" blocks. I've always felt that my turns in the 50 were slow for some reason but that my turns in the 100 are better than most. My turn/glide/sdk is where I tend to add distance on people rather than the swimming part. I was almost wondering if that's just the increased inertia of the weight. Will that glide ability go away without the weight there? I'm hoping not but i might not be so lucky. I'm not worried about the latter comments. Despite my comments about overeating, I'm not a complete hazard to myself either. I never strenuously overwork myself in the pool and I know my limits. That's a major reason I'm not really considering training for the 200 free anymore. I don't think I'm ready to train at the level needed for that kind of endurance. The 50 and 100 are nice for that reason, and the 7000m per week that I'm doing is perfect for those. I'm enjoying all the comments so far... and hoping the estimates are true for my times. :) Thanks to everyone so far for replying.
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  • Former Member
    Former Member
    Somebody once said the rule of thumb is improving 1 sec/50yds/#10 lost. Don't you wish! Your increased cross-section/profile in the water will increase drag and slow you down -- but if you float higher it could almost net out. I believe mass (weight) will help you travel farther ("carry well") underwater on starts. If your leg extension strength has also improved, you should also carry well underwater on turns. Heavier people need stronger legs too, just to walk around for daily activities. But with a larger midsection you probably won't be able to get as tight a tuck on flipturns, making them slower. I hope you keep tabs on the important numbers - blood pressure, cholesterol, heart rate - not just your time for a sprint 50. You're fast, but it would be in your interests to ease off if you're risking stroke/heart attack during very intense exercise. You bet I wish that was a true formula haha. I agree with the legs comment for sure. I've felt that my pushoffs are definately a strong point for me and especially my grab start. I typically get out to the flags on the start on 32" blocks. I've always felt that my turns in the 50 were slow for some reason but that my turns in the 100 are better than most. My turn/glide/sdk is where I tend to add distance on people rather than the swimming part. I was almost wondering if that's just the increased inertia of the weight. Will that glide ability go away without the weight there? I'm hoping not but i might not be so lucky. I'm not worried about the latter comments. Despite my comments about overeating, I'm not a complete hazard to myself either. I never strenuously overwork myself in the pool and I know my limits. That's a major reason I'm not really considering training for the 200 free anymore. I don't think I'm ready to train at the level needed for that kind of endurance. The 50 and 100 are nice for that reason, and the 7000m per week that I'm doing is perfect for those. I'm enjoying all the comments so far... and hoping the estimates are true for my times. :) Thanks to everyone so far for replying.
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