It is time to step out of your comfort zone.
If you're a cardio queen who's used to logging long runs on the treadmill, do more strength-training workouts.
If you do a lot of strength work, incorporate HIIT into your routine.
If your body is used to spinning , you've got to find a different way to push yourself.
"Mixing it up is key," Swan said.
That doesn't mean you have to ditch your favourite workout for good, but you do have to make some changes to see results.
How to mix things up
The best way to "find a way to get comfortable with being uncomfortable," according to Swan, is to follow someone else's lead , meaning take a class.
"Try taking new classes - take advantage of the variety of fitness in your city," she said.
Whether that means exploring a class you've never considered at your gym or signing up for ClassPass, the app that allows you to studio-hop, newness can be challenging and inspiring.
Then again, if you've hit the point where you don't want to go any class, we recommend picking up some gear .
New athletic wear can be surprisingly motivating.