. . . wrote:
your reply seems pretty idiotic.
correlations have bounds that they are valid within - if you don't understand that you should probably not comment.
also from 0 to 1% incline is a larger percent increase than 9 to 10%.
I am not sure however of the validity of the chart over the ranges provided, but your counter arguments provide no insight as to why the information is flawed -
If you aren't sure of the validity, why don't you just find a treadmill and RUN THE PACES IT SAYS and see how difficult they are.
I can't even comprehend what you mean by a larger percent increase. 1% of a mile is 52.8 ft. Going from 0-1% you will go up 52.8 ft/mile. Going from 9%-10% you will go from 475.2 ft/mile to 528 ft/ mile OR 52.8 ft/mile extra which is THE EXACT SAME AMOUNT OF INCREASE.
The problem is you don't expend LESS energy for each incremental percentage of incline you run up but you expend MORE. The chart is EXACTLY BACKWARDS in that regards.
I just plugged in race results for Simon Gutierrez who ran Mt Washington in 2011. He averaged 8:30 pace per mile. Based on his 5k at Carlsbad, he should be able to run 5:22 pace for 7.6 miles. The hillrunner chart says 8:30 pace at 11.5% incline is only worth 6:03 pace. There is a HUGE difference between 6:03 and 5:22.
I did the same thing for Craig Fram. He ran 9:03 pace for Mt Washington. hillrunner chart says that is worth 6:23 pace. He ran an 8 mile race at 5:50 pace 4 weeks later. Again, the chart was off over 30 seconds.
Any runner trying to hit the paces the hillrunner chart says a run at incline is worth is going to be running WAY TOO FAST for his level of fitness.