A behavioral scientist at the University of Michigan has identified what she calls the "perfect workout trap"-the all-or-nothing mindset that causes people to skip exercise entirely when they can't do it exactly as planned. According to Michelle Segar, PhD, this thinking keeps many from meeting fitness goals.
Segar's research, published in BMC Public Health, found that when subjects couldn't work out in their preferred way, they often did nothing instead. The key to breaking free, she says, isn't more discipline-it's flexibility.
Something is better than nothing
Even small doses of physical activity benefit health. Light exercise like walking or stretching can lower heart disease risk, manage blood sugar, and improve mental health. A single set of resistance exercises a few times a week can build strength. As Segar puts it, adopt an "all or something" mindset: any amount of activity is a win.
Have a backup plan
Dr. Edward Phillips of Harvard Medical School recommends "contingency planning." Decide in advance: if you can't run, walk; if you can't go to the gym, do bodyweight exercises at home. Segar suggests creating a "menu" of workouts of varying lengths and intensities.
Focus on the long game
Rick Richey, a master trainer with the National Academy of Sports Medicine, emphasizes consistency over years matters most. Missed days or weeks happen. The key is to come back without self-judgment. Set small goals and celebrate them. "You don't have to do the 150 minutes," he says. "Just do something you didn't do yesterday."
Any physical activity, Phillips adds, is a gift you give yourself.