None of us enjoys having our job cut into our leisure time. So the next time your boss asks you to work late and miss your band rehearsal or board game night, point them to a new study in the Journal of Vocational Behavior. Researchers have found that spending more time on a hobby can boost people’s confidence in their ability to perform their job well. But watch out — if your hobby is too similar to your work, then increased time on leisure activities may actually have a detrimental effect.