“I’ve always believed very strongly that the days you want to skip working out are the days you benefit from working out the most, because that is how you build mental resolve. You get more from going to the gym three or four times a week, and showing up when you’re supposed to, than going twice a week and giving 110 percent. The first time you quit on yourself, it makes it easier to do that in the future.” — Joshua Petrecky, recently named World Gym global ambassador for 2016-2017

Related: The Secret to Sticking with Your Gym Membership