Yup, from experience, you can pull this off for maybe a week or two before you start causing problems or negative output, or get actual health issues. And that'

Yup, from experience, you can pull this off for maybe a week or two before you start causing problems or negative output, or get actual health issues. And that's if you're young, older people tend to fall off sooner. The clincher is that you're never getting paid for the extra effort commensurate to it.