You've been a regular at the gym for some time now. At first each workout presented a huge challenge. These days, though, you can climb for hours on the stairmaster without even breaking a sweat. What gives? It's called adaptation. And now that your body is accustomed to your workout, chances are your sweat sesh is a little too easy for you. You know what that means—you've got to push even harder to make those gains (but that's a good thing). Here, four cues that confirm your exercise routine needs an overhaul.

If you have the energy to run 10 miles, hit the weights, and then attend Bikram yoga, you might want to re-evaluate the effort and exertion levels you're putting into each workout. Plus, multiple daily sweat sessions without proper recovery can put you at risk for injury.

Because your body is constantly adapting to your routine, it won’t be challenged enough if you do the same thing over and over (and over) again. This could also explain why you've stopped noticing physical changes. Try venturing into the anaerobic/maximum effort zone. Workouts that can get you there don't last as long, but you fatigue faster because your cardiovascular system can't supply enough oxygen to your muscles to create the energy you need.

If you spend more time selecting a playlist, or find the perfect angle for that sweaty selfie, than getting your heart rate up, something's got to give. Now there’s nothing wrong with changing the playlist to suit your mood, but if you’re more focused on Keeping Up With the Kardashians, it's time to refocus ASAP.

No matter the style of training, when you call time on your session, you should feel a sense of accomplishment, whether it's because you were able to hold every pose in yoga class or because you finally bench-pressed 40 pounds. When that feeling disappears, try pushing harder.