According to Runners World this is the potential benefit of me losing some weight.
At 5K it is roughly 2 seconds per pound per mile. So if I lose ten pounds the benefit per mile is 20 seconds or 62 seconds over 5K.
Lose Weight, Gain Speed |
This table, based on changes in maximal aerobic capacity, provides a rough estimate of how much your race times will improve if you lose weight, as long as you have it to lose. If your BMI drops below 18.5, you're at risk of becoming weaker and slower. |
WEIGHT LOST | 5K | 10K | HALF-MARATHON | MARATHON |
2 lbs | 12.4 secs | 25 secs | 52 secs | 1:45 |
5 lbs | 31 secs | 1:02 | 2:11 | 4:22 |
10 lbs | 1:02 | 2:04 | 4:22 | 8:44 |
20 lbs | 2:04 | 4:08 | 8:44 | 17:28 |
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