1

I'm taking part in a short but steep uphill run. It's only 910 meter, but it goes up 314 meter. The course record is 7:58, while the average exerciser (male) is probably around 14:00-15:00. Last years results (male only):

#       Time:
1       08:00
10      08:54
100     10:33
500     12:12
1000    13:15
2000    15:18
2500    16:43
3000    19:28
3300    34:00

I've always finished somewhere between 11:00 and 12:00. This year I'm in worse shape than ever, so I'm hoping I can cut some seconds by reducing my weight. I'm wondering though, will I gain a lot by dropping 1,2,3.. kilos prior to the race, or will the loss of muscles prevent me from performing better?

I'm 187 cm, 86 kg.

For the record: I don't really want to lose weight in general, but I'm willing to do so temporarily in order to get a good time. I don't have the time to exercise any more than I do now, so the way to lose weight for me is simply by consuming fewer calories.

Any other tips are of course well-received!


Pure physics (if it was straight up)

If this was a pure climb (straight up), and assuming a race time of 12:00, and body weight of 86 kg, this would require an average of 410 W. Assuming I'm still able to output the same power after a weight-loss, then the finishing time will just be 12:00 scaled by a factor of New weight / 86 kg. So, if I go down to 83 kg, I'll be able to finish in about 11:34.


But, this isn't a straight up climb...

  • To clear up a misconception: The weight you will lose will be mostly fat. Catabolism of muscles wont significantly happen if you drop 3 kilos at that weight/height. – John Aug 25 '16 at 12:50
  • Well, isn't that a good thing! :) But really, if I simply eat less a few weeks then I won't lose muscles? So no downsides (except less chocolate of course)? – Stewie Griffin Aug 25 '16 at 12:54
  • Pretty much, yes. 'Starvation Mode' has been thoroughly debunked on other questions. – John Aug 25 '16 at 13:42
1

The improvement you think you will hypothetically do is very high. Biomechanic is different. And so its bioenergetics.

Reducing your weight will put you in a metabolic unfavourable state for power output ( lower levels of testosterone ). Not only that it could probably lead to a decrease in your lactate tolerance that with those kind of times ( around 8-12 min ) is crucial.

You will feel weak. And the less time you have to drop that weight, the worst will be. ( Assuming you are a natural athlete ).

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.