5 Mistakes People Make With Group Fitness & How To Actually Get Stronger

Fitness classes hold a long-standing spot on many women's calendars. We have our favorite studios, our favorite instructors, and our favorite classmates to commiserate with. And the foundation of group fitness is movement plus community—which research shows to have a pretty impressive impact on your mental and physical health1.

But even if you attend three, five, or even seven classes a week, those physical benefits seem to wane with time or even stall at the starting gate. It's frustrating (I've been there). 

Boot camps, spin, circuit training, Tabata, and kickboxing are all popular "high-intensity" classes. They're supposed to get your heart rate up and have the potential to help you burn fat and build muscle2 efficiently (when programmed correctly of course). 

But exercise physiologist and sports nutritionist Alyssa Olenick, Ph.D., sees things go awry when women start going overboard on these classes. "Doing 5-6 days a week of 'higher intensity' work can make it so that nothing is high intensity anymore—it kind of all meshes into moderate intensity," she says. 

Overall, this type of routine is the perfect recipe for picking up the same weights day after day or telling yourself you can't give it your all during the workout because you have to do it all again tomorrow. 

In addition, "It also doesn't 'polarize' or 'balance' easy and hard work or allow space for recovery or other types of fitness," Olenick notes. 

And that's the next biggest pitfall: not mixing up training methods. 

"Sometimes we fall in love with a particular style of movement, or studio—which is great. But at some point, your body will start to adapt to that movement style, and it will no longer push you the same way it did when you first started," says instructor and co-owner of a fitness studio Thalia Bardell. 

Olenick recommends incorporating longer-duration slower cardio sessions (walking or zone 2 training are some examples), or slower, heavier strength training to your routine alongside your favorite group fitness classes. 

Or, if you're strictly a group fitness person, you can find this variety in the classes you take—with the right amount of planning. 

"For those who struggle with cardio, try adding a HIIT, indoor cycling, or running class into your routine two days a week," says Bardell. 

Results will also plateau if the weights that you're lifting plateau—as a certain amount of stress, tension, and even muscle damage is needed for muscle growth. And more and more weight is eventually needed to keep driving those beneficial changes. 

"If you've been using the same weights for over a year in your barre or strength classes, it's time to level up," says Bardell. "Because what's the worst that can happen? You go back to what you were lifting before? It's not that big of a risk." 

To lift heavier, Olenick emphasizes the importance of moving slower through the exercises. "Instead of moving weight around quickly, think about going slower in these classes so you will do fewer reps during the set time."

"Another barrier to seeing results in group fitness is that we often rely on the class itself to do most of the work in terms of challenge," says Bardell. And while actually making it to the class is often considered one of the biggest hurdles, just showing up and going through the motions isn't enough to incite change. 

"The magic of group fitness really happens when you push yourself within the parameters of the class," says Bardell. "If the class itself is challenging and then you bring a physical and mental energy of stepping out of your comfort zone, you will continue to see results."

Lastly, not fueling adequately can hinder your progress (and recovery) from fitness classes. 

Olenick sees many women not eating the protein and carbs (and even calories) to support the intensity and volume of training. 

And most women need a lot more protein than we think (we dive deeper into that topic here)—typically a minimum of 100 grams a day.

Earlier this year, I started a two-week experiment where I upped my protein intake from 60 to 100 grams a day, and I felt more energized, stronger, and like I could push myself much harder during my workouts. Needless to say, I'm still on the high-protein bandwagon. 

The biggest physical difference I felt, though, was once I started taking a creatine supplement. Creatine has long been a popular choice for gym bros, but it's important for women too. Creatine helps increase the energy supply in your muscles and promote efficient recovery, meaning you are more prepared to take on your next class. It also increases lean muscle

Carbs are also vital to improving your fitness. Glucose is the main source of fuel for our cells, and you'll feel the downsides almost immediately during a workout (especially for high-intensity or aerobic training) if you don't have enough on hand. 

Group fitness is a great way to stay active, form friendships, and get stronger. But it's easy to get comfortable with your routine and then see progress stagnate.

While you can (and should!) keep going to your favorite classes, make sure you're also mixing up your training methods and picking up those heavy weights.