I’m assuming you mean circadian rhythm, rather than cardiac rhythm. Yes going for a walk in the morning can help you get your circadian rhythm back on track. O

I’m assuming you mean circadian rhythm, rather than cardiac rhythm. Yes going for a walk in the morning can help you get your circadian rhythm back on track. One of the reasons that is a good suggestion is that getting exposure to the sunlight early in the day signals to your brain to make melatonin which you need to sleep.