| bradidas |
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I recently read this forum suggesting that if you could run 6x400m in 60 with 2mins rest that you are capable of running 1:55 for 800m, does anyone feel that is correct? And if so what is the calculation to work this out? |
| hitmonlee |
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You'd have to be one fast.. to run 1:55 for the 800 if you need 2 minutes rest to run 6x 400 in 60. Remember that the 800 is usually a positive split race o to run 1:55 you'd probably need to go out in 54-57. Then there's no 2 minutes of rest, you need to run under 60 immediately after doing that. It seems like a good workout for preparing to run the second lap economically. If you have another speed workout that you run in addition to mileage, then it would help you prepare. The only way I would see it as a predictor of your ability to run 1:55 is if you ran each 400 as a progression and came in under 26 for the last 200 each time. |
| dsrunner has the day off |
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every workout can predict something. 6x400 w/ 2' is a decent one, basically anything that involves something close to goal pace and getting tired. the calculation is the simple velocity duration relationship. 1x400 60 predicts ~230m at 1:55 pace 2x400m 60 predicts ~ 560m at 1:55 pace then you can apply a ln/ln plot of those kinetics and you end up with something close to 5 or 6 reps required for 800m at 1:55 pace. 6x400 60 w/ 2', yeah ~1:55 a 400 runner moving up with nearly no endurance training at all but say, 45-46 4x400m speed, would not need 6x and could still run faster than 1:55, but for the average 800m runner, this works fine. the key point is to understand that velocity in one measure predicts velocity in another measure. |
| SlowFatMaster |
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ds runner: Could you explain in more detail how you calculate the 230m and the ln/ln graph? Thanks. |
| bradidas |
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hi thanks for your answer but I don't really understand the calculation process of the work out. If I wanted to run 1.48 what would I need to do for 6x400? |
| gickball |
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BUMP. |
| Cynical. |
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Would be interested in hearing an explanation on these if possible? |