awesome vid, love the actionable format! Curious about the cold exposure before bed: I've theorized that it could actually be beneficial to sleep because it would help lower body temperature and signal that it's sleep time. What are your thoughts?
Thanks! Using it before bed would almost certainly *worsen* sleep by increasing sympathetic nervous system activity (the "fight or flight" response) and quite possibly by *raising* core temperature via stimulation of brown adipose tissue thermogenesis. Conversely, heating the skin (e.g., via a 10-min hot shower 1 to 2 h before bed) increases the core temperature drop around sleep, supporting healthy sleep (there are many studies showing this). Hope that helps!
