Metcalf Mauler Times
July 29, 2008 8:28 pmAnn decided to just run today so we went for a 5 mile run this morning. I still wanted to do the Metcalf Mauler so I drove up to the trail head in Morgan Hill to bike up from there. I left early enough to make a climb up Metcalf before riding to the ride start. I have been trying to get my time down since I was able to often get under 14 minutes last year. Two weeks ago we set a new best time on the tandem. Today I made the climb in 14:10, my best time so far this year. I am getting close to breaking 14 minutes again. My weight is up 5 lbs from last year at this same time so that accounts for some difference.
Using my current weight of 141, the distance of 1.75 miles and climb of 1,000 feet, I can calculate the power output for today’s climb as follows:
Power required to overcome gravitational resistance: 257 watts.
Power required to overcome rolling resistance: 12 watts.
Power required to overcome aerodynamic resistance: 6 watts.
Total power required: 275 watts.
So what happens if I drop my weight to 136, keep the other parameters set except the time. What time would result in the same 275 watts? If I use a time of 13:45, I get the same results. So you might think the extra 5 lbs cost me 25 seconds. That is not entirely true because the lighter you are, the less your muscles develop while you climb, but we can still see that there is a significant effect.
I do the Metcalf climb about every other week and usually measure my time. This table shows several times over the past couple of years. I think my best time is 13:19, April last year.
Metcalf Climb |
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Distance: 1.75 miles, Climb: 910 feet, Avg Grade: 10%
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Date
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Time
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Weight
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Max HR
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Avg HR
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Ft/Min
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Single
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Tandem
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07/29/08
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14:10
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142
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64.3
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07/15/08
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17:30
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143
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172
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168
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52.0
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07/01/08
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14:31
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142
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177
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175
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62.8
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06/24/08
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18:13
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141
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165
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159
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05/13/08
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18:23
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140
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172
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171
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03/11/08
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14:18
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142
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174
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170
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10/16/07
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15:10
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136
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175
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166
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09/04/07
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13:35
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136
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173
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167
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04/10/07
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13:19
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134
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170
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165
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68.2
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09/12/06
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13:52
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136
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180
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167
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08/29/06
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14:36
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136
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170
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166
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Categories: Cycling, Speed Workout
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