>>12338596>a common saying isCitation?
Your waste is warm when you deposit it.
Your body's thermal conductivity doesn't change after you shit and piss but the amount of heat and heat capacity of your body decreases.
You will lose the same amount of heat while sleeping whether you deposited before or not.
This heat lost while sleeping will be a higher % if you deposited before thus leading to a bigger temperature decrease which will require burning more calories to make up.
If you are out there for a short time, hold it as much as you can.
If you are out there for a long time, you'll have to shit/piss eventually and the amount will be the same in the long run.
Assuming you are exposed to the cold when depositing, holding it may reduce the overall heat lost to extra exposure to the elements.
My advice would be to hold it as much as you can and only choose to deposit at the warmest time of day to reduce losses to exposure.