Fasted cardio eats muscle ... cortisol highest in am. If you don't eat, it will stay elevated and even increase. And if you do cardio work, which also tends to jack up cortisol output, you'll end up with a sky-high cortisol level, which is one of the best ways to lose muscle. Not only that, if it gets high enough you'll actually have a hard time bringing it down during the day (especially when in a caloric deficit). You end up spending the whole day in a muscle-wasting state!
Your Post Workout Routine Needs This One Supplement For best results, cool-down stretches should be passive, so you’ll hold them for a while (as opposed to dynamic stretches before a workout, which you shouldn’t hold for long). As a rule of thumb, she aim for six to eight deep breaths.