O'Leary has similar clients try a horizontal pull-up at home with a pull-up bar in a doorway (from lying on ground) or with a similar setup at the gym (lying on a bench with a fixed horizontal bar set up above).
While lying in a functional magnetic resonance imaging (fMRI) scanner, 19 volunteers were presented with a series of negative life events, such as being robbed or developing cancer, and asked to estimate the probability that this event would happen to them in the future.