In race hydration - weight and watts

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la85
Posts: 167
Joined: Fri Apr 17, 2020 10:13 am

by la85

Hey all,

Keen on everyone’s take on this one. Weight penalty for carrying fluid vs time penalty for refills at aid stations.

Over a four and a half hour gravel race I can carry two bottles on my bike but need four.... not going to risk a bottle drop so would have to stop at an aid station and refill at approx 2hr mark.

What is the weight penalty for carrying 1.2kg of extra water in a camelback?

Basically weighing up whether to stop and re fill the bottles - maybe a 90 - 120 second time penalty?

Or carry a camelback and carry the extra weight for essentially half of the 110km race - 2hrs of carrying 1.2kg.

Let me have it!

Cheers

by Weenie


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Tifosiphil
Posts: 387
Joined: Wed Nov 14, 2018 11:09 pm

by Tifosiphil

What's your course profile like?

On a flatter course I would take the extra weight all day long but remember a Camelbak will probably cause some extra heat and sweat. Maybe go for a bladder down the front if your wearing a skin/speedsuit?

It also depends how well a rest does your legs. Personally 30 seconds off the bike would probably do me good after 2-3 hours but I know people who would stiffen up in that time if they are pushing hard

robeambro
Posts: 1876
Joined: Sat Jul 07, 2018 6:21 pm

by robeambro

la85 wrote:
Mon Jun 17, 2024 9:03 am
Hey all,

Keen on everyone’s take on this one. Weight penalty for carrying fluid vs time penalty for refills at aid stations.

Over a four and a half hour gravel race I can carry two bottles on my bike but need four.... not going to risk a bottle drop so would have to stop at an aid station and refill at approx 2hr mark.

What is the weight penalty for carrying 1.2kg of extra water in a camelback?

Basically weighing up whether to stop and re fill the bottles - maybe a 90 - 120 second time penalty?

Or carry a camelback and carry the extra weight for essentially half of the 110km race - 2hrs of carrying 1.2kg.

Let me have it!

Cheers
I presume you're coming to this dilemma after having watched Dylan Johnson's vid about Unbound.

Look, you can try and model and theorise all you want about this, but you can't predict race dynamics. If you get to the feed zone(s) in a pack and you get dropped for having to refill, most likely you'd have been better off with a camelback. On the other hand, sometimes you may get to the feed zone by yourself, and refilling allows you to join an incoming pack that was behind.

Personally, if you are so inclined about wanting to make the best choice, then I'd remove the worry altogether - wear a jersey / suit with integrated hydration (or an aero-ish framebag with a bladder in it). Any weight gain will be at least compensated, if not surpassed, by the aerodynamic gains. So no more dilemma.

eins4eins
Posts: 812
Joined: Wed Sep 28, 2016 11:49 am

by eins4eins

If the course isn't all about climbing, go with the hydration backpack. I did gravel and mtb races with a 1,5 or 2l bladder, depending on the duration, and will continue doing so.
It has some other advantages besides not loosing your position in the pack when stopping. Not needing to take your hands of the bar makes drinking a lot easier and safer, allowing you to fuel more. Also not many cages can securely grab a 800-900ml bottle over rough terrain and loosing one will be detrimental for performance.

It also simplified my fueling strategy a lot. With the nutrition i use, i'm able to put up to 800gr of carbs into the bladder. This is enough for all the races i do, so i don't need to carry anything extra. No fuel to carry in the pockets, no fiddling around with gels or bars.
Bottles on the bike only contain water.

la85
Posts: 167
Joined: Fri Apr 17, 2020 10:13 am

by la85

eins4eins wrote:
Mon Jun 17, 2024 12:12 pm
If the course isn't all about climbing, go with the hydration backpack. I did gravel and mtb races with a 1,5 or 2l bladder, depending on the duration, and will continue doing so.
It has some other advantages besides not loosing your position in the pack when stopping. Not needing to take your hands of the bar makes drinking a lot easier and safer, allowing you to fuel more. Also not many cages can securely grab a 800-900ml bottle over rough terrain and loosing one will be detrimental for performance.

It also simplified my fueling strategy a lot. With the nutrition i use, i'm able to put up to 800gr of carbs into the bladder. This is enough for all the races i do, so i don't need to carry anything extra. No fuel to carry in the pockets, no fiddling around with gels or bars.
Bottles on the bike only contain water.
Good point!

Greeners
Posts: 32
Joined: Fri Apr 26, 2024 10:13 am

by Greeners

Hydration is such a personalmatter. I ride with a chap that sweats a lot, & drinks a heck of a lot more fluid than I do. I get ridiculed for not drinking enough, but my performance never really drops off. The difference in consumption of fluids between us is massive,especially when in hot climates. So I am saying there is no hard rule as to how much you should carry or intake.

by Weenie


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