Social facilitation. That’s the tendency to perform better when you know you’re being watched. And, according to sports psychologists, it’s why, when you run with a friend who’s a little fitter than you, you run faster. Or you try harder in an exercise class when the instructor is walking around the room, watching your moves. So, if you have trouble with motivation when you’re working out, it pays to exercise in a group or with a friend. Just remember: Social facilitation, and at the moment, social distancing too.