avondale
DIS Veteran
- Joined
- Oct 24, 2017
- Messages
- 1,974
I have been thinking that with a 50k coming up that I plan to spend 7 - 8 hours completing that I should really make sure my nutrition and hydration are at an ok level.
I generally see recommendations of taking in 150 - 300 calories/hr for endurance/trail running. I am usually eating every 35 or 40 minutes in chunks of 80 or 160 cal...a half-sleeve of GU Chews is 80 cal and one Honey Stinger waffle is about 160 cal. So it seems like my food intake is reasonable.
For water, if I'm eating about 200 cal/hr, then I need about 0.5 oz of water for each gram of carbs: assuming the 200 cal is all carbs (it's close), then that's 50 g of carbs and so 25 oz of water per hour.
Ok, so for my 160 min run last week: 160 min = 2.7 h. I ate 320 cal. Again, if it's all carbs, then that is 80 g of carbs. That would lead to 40 oz of water, which is a bit less than 1.5 L. I drank between 1.5 - 2 L, so I generally did ok with both food and water goals.
But scaling up to 8 hours...! That would be 1600 cal and 400 g of carbs, which would lead to 200 oz of water. Ok, I have the capability of carrying 3.5 L with a drop bag, which 115 oz of water. Wow, that's not nearly enough. 2 L of that is in small soft flasks that are more easily refillable than my reservoir. I'm going to have to plan to do some refills. Sigh. I wonder if I can talk my husband into crewing? Doubtful - he's not planning to go. Well, such is life.
But it's good for me to be thinking about it. I'm also going to have to think about how to best carrying water for my training runs, too, when they get longer. Not an issue I've reached before.
I generally see recommendations of taking in 150 - 300 calories/hr for endurance/trail running. I am usually eating every 35 or 40 minutes in chunks of 80 or 160 cal...a half-sleeve of GU Chews is 80 cal and one Honey Stinger waffle is about 160 cal. So it seems like my food intake is reasonable.
For water, if I'm eating about 200 cal/hr, then I need about 0.5 oz of water for each gram of carbs: assuming the 200 cal is all carbs (it's close), then that's 50 g of carbs and so 25 oz of water per hour.
Ok, so for my 160 min run last week: 160 min = 2.7 h. I ate 320 cal. Again, if it's all carbs, then that is 80 g of carbs. That would lead to 40 oz of water, which is a bit less than 1.5 L. I drank between 1.5 - 2 L, so I generally did ok with both food and water goals.
But scaling up to 8 hours...! That would be 1600 cal and 400 g of carbs, which would lead to 200 oz of water. Ok, I have the capability of carrying 3.5 L with a drop bag, which 115 oz of water. Wow, that's not nearly enough. 2 L of that is in small soft flasks that are more easily refillable than my reservoir. I'm going to have to plan to do some refills. Sigh. I wonder if I can talk my husband into crewing? Doubtful - he's not planning to go. Well, such is life.
But it's good for me to be thinking about it. I'm also going to have to think about how to best carrying water for my training runs, too, when they get longer. Not an issue I've reached before.