This is very interesting! I enjoy playing Gran Turismo 7 and often find it very calming; especially when I'm in a flow state and can get through a tricky part of the track very quickly without any mistakes.
I wonder if this is a case where both theories apply - the rhythmic, controlled driving stimulates the 'soothing system' while the challenge of maintaining control at high speeds provides that 'risky play' element.
I wonder if this is a case where both theories apply - the rhythmic, controlled driving stimulates the 'soothing system' while the challenge of maintaining control at high speeds provides that 'risky play' element.