Group Fitness Is Not Strength Training… And That’s Okay
"I do strength training, I take three group fitness classes a week."
"I’m sore after boot camp, doesn’t that mean I’m building muscle?"
If that sounds familiar, you're not alone.
First, let's acknowledge something important: showing up matters. Moving your body matters. Group fitness classes can be motivating, energizing, social, and incredibly beneficial for overall health. They help build consistency, improve cardiovascular fitness, and create a sense of community that keeps many women coming back.
We love that, however, there’s a distinction that often gets lost in the conversation: Group fitness is not the same thing as strength training. So, understanding that difference can have a profound impact on your long-term health.
My Own Wake-Up Call
After retiring from bodybuilding, I stayed active. I continued moving my body in ways that felt good, enjoyable, and sustainable. I attended classes, stayed generally fit, and maintained an active lifestyle.
But over time, I noticed that I wasn't maintaining muscle, I wasn't getting stronger, and I was moving plenty, but I wasn't training for strength.
That experience reinforced something I've observed repeatedly over the years: movement and muscle-building are not the same thing.
Sweating isn't the same as stimulating muscle growth, and being exhausted at the end of a workout isn't necessarily the same as building strength.
And this isn't about judgment, it's about clarity.
If we want to help women build strength, support healthy aging, and protect their metabolic and hormonal health, we need to be honest about what different forms of exercise actually accomplish.
Why Group Fitness Isn't Strength Training
Most group fitness classes are designed around energy, efficiency, and keeping everyone moving. That often means:
Time-based circuits
Fast transitions between exercises
High repetitions
Light-to-moderate loads
Minimal rest periods
Limited individual coaching
These formats can be fantastic for cardiovascular fitness and calorie expenditure. But they are not optimized for building maximal strength or muscle.
According to movement expert Kelly Starrett, strength is built on position, posture, stability, and control. Developing those qualities requires time to brace, focus, and progressively challenge the body under load, aka, “progressive overload”
Likewise, researchers and experts, including Dr. Stacy Sims, emphasize that women—especially during midlife and beyond—benefit from intentional resistance training that preserves lean muscle mass and helps protect against age-related muscle loss, known as sarcopenia.
Dr. Mary Claire Haver has also highlighted the role of muscle in supporting metabolic health, insulin sensitivity, mitochondrial function, and healthy aging.
The keyword in all of this is: intentional. Strength training isn't simply about moving. It's about applying the right stimulus.
Soreness Doesn't Equal Muscle Growth
One of the biggest misconceptions in fitness is the idea that soreness automatically means a workout was effective. Many people leave a bootcamp or HIIT class feeling sore and assume that soreness is proof of muscle growth, but this is not necessarily true.
Lactate is often mischaracterized as a cause of muscle damage. However, lactate is simply a byproduct of anaerobic energy production and is responsible for the transient burning sensation experienced during a set. It is not a marker of an effective workout. In fact, the body clears lactate from the bloodstream within approximately 60 minutes of cessation of exercise.
Muscle growth and strength development are largely driven by:
Mechanical tension
Progressive overload
Adequate recovery
Neuromuscular adaptation
In other words, the goal isn't simply to feel “the burn.” Rather, the goal is to create a stimulus that tells the body, "Adapt. Get stronger. Build muscle."
That's a very different process.
The Reframe Women Need
Instead of treating group fitness and strength training as competing approaches, let's recognize that they serve different purposes.
Group Fitness Is Great For:
Cardiovascular health
Consistency and routine
Community and accountability
Stress reduction
Energy and enjoyment
Aerobic conditioning
Strength Training Is Essential For:
Building and maintaining muscle
Protecting bone density
Improving metabolism
Supporting hormonal health
Enhancing balance and stability
Preserving independence as we age
Both have value, but they are not interchangeable.
What Real Strength Training Looks Like
If your goal is to build strength, preserve muscle, and support long-term health, consider incorporating:
2–3 Dedicated Strength Sessions Per Week
Focus on quality over quantity.
Compound Movements
Prioritize exercises such as squats, deadlifts, presses, rows, and pulling movements. These recruit multiple muscle groups and provide the greatest return on your effort.
Progressive Overload
Gradually increase weight, reps, or training difficulty over time. Without progression, the body has little reason to adapt.
Adequate Rest
Rest periods are not wasted time. Recovery between sets allows you to generate more force and maintain better movement quality.
Excellent Form
Bracing, breathing, control, and technique matter more than speed. Strong movement patterns create strong bodies.
Muscle Is Medicine
For women especially, strength training is about far more than aesthetics. Muscle supports metabolic health. Muscle improves resilience. Muscle helps regulate blood sugar. Muscles protect joints and bones. Muscle can also be one of the most powerful tools we have for navigating aging, menopause, and long-term wellness.
This isn't about chasing a burn.
It's about building a foundation.
The Bottom Line
At Alluvita, we're not against group fitness.
We're for clarity. So keep your Pilates class, keep your sculpt sessions, keep your spin bike, and enjoy the movement that brings you joy.
But let's stop calling every workout strength training.
Women deserve to understand what their bodies truly need—and to have access to both the energy of movement and the power of resistance training because the goal isn't simply to sweat. The goal is to build. You deserve to be strong, supported, and equipped to train in a way that matters.
Because it does.
This content is for informational purposes only and is not medical advice. Always seek the guidance of a qualified healthcare provider before making any changes to your diet, exercise, or health routines.
