1500m (1650yd) swim vs 5km (3mi) run

yesterday I swam a 1500 to get a sign up time. it's been nearly 6 months since i have swam anything over 400m. I had no idea how I should swim it, or how it would feel during. took off way too fast 1:15, then 2:25 at the 200 and 5:20 at the 400. but then averaged about 1:25-1:26 for the rest and ended upw ith 21:10. it got me thinking about a 5km run. I don't run, but it seems that almost every spring I decide it's time to start and i do run 3-5 times and I always use a 5km as a test/goal distance. my goal for the 1500 in 3 weeks is to be under 20:00 so I have 3 weeks to learn how to hold a 1:20 pace, as well as to prepare mentally how it feels to swim that long. but I find it funny that my goal for the 5km has also been to run it under 20:00 anyone else have similar times for the 1500 and 5km? (1650yd vs 3 miles)
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  • well I managed to swim my 1500 in 20:00.36 so I guess I have my work cut out for me if I am going to run a 5km under 20 this summer. 1:13.46 2:31.37 (1:17.91) 3:50.22 (1:18.85) 5:09.11 (1:18.89) 6:28.83 (1:19.72) 7:48.79 (1:19.93) 9:08.40 (1:19.61) 10:29.67 (1:21.79) around 750 I stopped thinking about my turns 11:50.43 (1:20.76) 13:11.97 (1:21.48) 14:33.50 (1:21.53) 15:55.35 (1:21.85) looked at the lapcounter and spent a 50 doing simple math in my head 17:18.85 (1:23.5) figured out I only had 200 left and started to pick up the pace 18:40.56 (1:21.71) 20:00.36 (1:19.8) Two items for your consideration, Mr. Rynko: 1. I see you live in Sweden. Did you ever meet any of the fellows in the wonderful documentary film, Men Who Swim? 2. Though you beat me by around 4 seconds (I swam the 1650 in 20:03.90), so technically I have no business advising you, I would like to point out that there is another way to swim the distance that might let you do a better time in the future while suffering less pain. You swam in a meters pool, so the splits aren't entirely comparable, but the basic idea is that you started off fast and progressively slowed down till a little resurgence at the end. I started off slowly and negative split pretty much the whole thing: Leg Cumulative Subtractive 1 34.85 34.85 2 1:13.66 38.81 3 1:52.57 38.91 4 2:31.45 38.88 5 3:09.96 38.51 6 3:48.15 38.19 7 4:26.16 38.01 8 5:04.07 37.91 9 5:42.01 37.94 10 6:19.86 37.85 11 6:57.06 37.20 12 7:33.92 36.86 13 8:10.76 36.84 14 8:47.65 36.89 15 9:24.23 36.58 16 10:00.75 36.52 17 10:37.02 36.27 18 11:13.48 36.46 19 11:49.72 36.24 20 12:25.99 36.27 21 13:02.22 36.23 22 13:38.45 36.23 23 14:14.86 36.41 24 14:50.92 36.06 25 15:26.74 35.82 26 16:02.49 35.75 27 16:38.18 35.69 28 17:13.63 35.45 29 17:48.82 35.19 30 18:23.98 35.16 31 18:59.38 35.40 32 19:33.53 34.15 33 20:03.90 30.37 For really extraordinary younger swimmers, going fast the whole way without too much regard to pacing is probably the way to go. But the older you get--I'm now 58--the more I am convinced that performance in longer events is much more dependent on good strategy and pacing than brute endurance. A young fellow in my heat was a little ahead of me till the 650 mark. I had no sense I was speeding up, but suddenly I couldn't see him anymore, and I assumed he had take the lead. He actually dropped way behind, the victim of over-enthusiasm at the beginning. Live and learn! Using Thorton's coefficient: If your running your 5k's @20 min then 1.5 km swim should be ~ 16:35 if your dist swimming is as strong as your running Thanks, Steve, for being the first person besides me to use what I profoundly hope will one day become a much bandied-about household phrase: The Thornton Coefficient How mellifluously it rolls off the tongue to charm the ears of any and all within its sonic orbit! Thanks!
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  • well I managed to swim my 1500 in 20:00.36 so I guess I have my work cut out for me if I am going to run a 5km under 20 this summer. 1:13.46 2:31.37 (1:17.91) 3:50.22 (1:18.85) 5:09.11 (1:18.89) 6:28.83 (1:19.72) 7:48.79 (1:19.93) 9:08.40 (1:19.61) 10:29.67 (1:21.79) around 750 I stopped thinking about my turns 11:50.43 (1:20.76) 13:11.97 (1:21.48) 14:33.50 (1:21.53) 15:55.35 (1:21.85) looked at the lapcounter and spent a 50 doing simple math in my head 17:18.85 (1:23.5) figured out I only had 200 left and started to pick up the pace 18:40.56 (1:21.71) 20:00.36 (1:19.8) Two items for your consideration, Mr. Rynko: 1. I see you live in Sweden. Did you ever meet any of the fellows in the wonderful documentary film, Men Who Swim? 2. Though you beat me by around 4 seconds (I swam the 1650 in 20:03.90), so technically I have no business advising you, I would like to point out that there is another way to swim the distance that might let you do a better time in the future while suffering less pain. You swam in a meters pool, so the splits aren't entirely comparable, but the basic idea is that you started off fast and progressively slowed down till a little resurgence at the end. I started off slowly and negative split pretty much the whole thing: Leg Cumulative Subtractive 1 34.85 34.85 2 1:13.66 38.81 3 1:52.57 38.91 4 2:31.45 38.88 5 3:09.96 38.51 6 3:48.15 38.19 7 4:26.16 38.01 8 5:04.07 37.91 9 5:42.01 37.94 10 6:19.86 37.85 11 6:57.06 37.20 12 7:33.92 36.86 13 8:10.76 36.84 14 8:47.65 36.89 15 9:24.23 36.58 16 10:00.75 36.52 17 10:37.02 36.27 18 11:13.48 36.46 19 11:49.72 36.24 20 12:25.99 36.27 21 13:02.22 36.23 22 13:38.45 36.23 23 14:14.86 36.41 24 14:50.92 36.06 25 15:26.74 35.82 26 16:02.49 35.75 27 16:38.18 35.69 28 17:13.63 35.45 29 17:48.82 35.19 30 18:23.98 35.16 31 18:59.38 35.40 32 19:33.53 34.15 33 20:03.90 30.37 For really extraordinary younger swimmers, going fast the whole way without too much regard to pacing is probably the way to go. But the older you get--I'm now 58--the more I am convinced that performance in longer events is much more dependent on good strategy and pacing than brute endurance. A young fellow in my heat was a little ahead of me till the 650 mark. I had no sense I was speeding up, but suddenly I couldn't see him anymore, and I assumed he had take the lead. He actually dropped way behind, the victim of over-enthusiasm at the beginning. Live and learn! Using Thorton's coefficient: If your running your 5k's @20 min then 1.5 km swim should be ~ 16:35 if your dist swimming is as strong as your running Thanks, Steve, for being the first person besides me to use what I profoundly hope will one day become a much bandied-about household phrase: The Thornton Coefficient How mellifluously it rolls off the tongue to charm the ears of any and all within its sonic orbit! Thanks!
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