When you exercise, or exert yourself physically, the muscles of the head, neck, and scalp need more blood to circulate. This causes the blood vessels to dilate, which can lead to a condition called exertional headaches. Headaches that most frequently occur due to exercise or over-exertion include jogger's headache and orgasmic headache (sex headache). While these may occur in isolation, they are most common in people who have an inherited susceptibility to migraine (one or both parents have migraines).
Closed beta is beta testing only available to a select few individuals or only company employees. How to be a beta tester. Many games (especially online games) in the final stages development have an open beta for several months that allows anyone interested in the game to play and report problems.
Battlefield Hardline developer Visceral Game has extended the game's beta by 24 hours. Previously scheduled to end yesterday, February 8, the multiplayer trial is now set to come to a close Monday, February 9, during evening Pacific time.