True that “sleep better, eat better, exercise” is generic advice ignoring constraints. Like telling someone with insomnia, three kids, and a night shift to “sleep better” or telling someone broke to “have more money.”

But being difficult to put into action doesn’t mean the advice is wrong. Sleep deprivation measurably increases cortisol and inflammatory markers. Exercise measurably reduces them. These actions have quantifiable sometimes immediate effects regardless of how we define stress.