cluster headaches and exercise in Research & Scientific News Posted October 11, 2020 First of all, have you read this; https://www.vitaminexpress.org/uk/melatonin-supplements I usually stick to yoga and low impact exercises (ie. post op, post-natal) that aren't too intense. I keep my sessions light and take breaks and focus on my breathing when I feel my head start to pick up. Melatonin has done little for me because nothing seems to stop me from waking up with the headaches and I'm fairly free for the day. I also tried diphenhydramine with no success.