Can You Build Muscle While Running?

Short answer: Yes.

You can absolutely build muscle while running—if your training, nutrition, and recovery are on point.

Running doesn’t automatically kill gains. But doing too much, too fast, without planning? That will.

Understand the Interference Myth

For a long time, conventional wisdom claimed cardio and muscle didn’t mix. The belief was that running would “burn muscle” or block strength gains. But the science has evolved.

Current research shows that combining strength training with running can still lead to muscle growth—especially when the running is low to moderate intensity, and the strength work follows a progressive plan (Lundberg et al., 2022; Schoenfeld et al., 2021).

What actually causes the interference effect is poor recovery, under-eating, and stacking two high-stress workouts without giving the body time to adapt (Sabag et al., 2018; Schoenfeld et al., 2016).

If you’re smart about how you run and lift, you can get stronger, build muscle, and still put in meaningful miles.

When Running Supports Muscle Growth

Not all running is destructive to gains. In fact, the right kind can enhance recovery, develop leg endurance, and keep your heart strong enough to sustain more intense lifting blocks.

Zone 2 runs are easy aerobic efforts that boost blood flow, speed up recovery, and improve base fitness. These runs can enhance your work capacity in the gym without compromising your muscle-building goals (Sekely & Aguillard, 2025).

Hill sprints and strides are underrated tools for building power and activating fast-twitch muscle fibers. They’re short, high-quality, and don’t drain your system like long, fast intervals (Sekely & Aguillard, 2025).

Post-lift aerobic runs can help you stay lean and fit without eating into strength adaptations—especially if they’re kept short and relaxed (Verywell Health, 2020).

Hybrid athletes use running as a tool—not a threat.

When Running Steals Your Progress

You run into problems when running becomes a competing priority.

Too much high-intensity running (like intervals or fast-paced long runs) increases cortisol and fatigue, which can blunt recovery and make strength gains slower (Lundberg et al., 2022).

Running on empty—with poor nutrition or low sleep—puts your body into survival mode, not growth mode.

Training both systems hard without recovery is the fastest path to stagnation or injury (Sabag et al., 2018).

It’s not that running and muscle are incompatible. It’s that trying to chase both extremes without planning leads to burnout.

How to Make It Work

Here’s how to build muscle while still logging miles:

Lift heavy and consistently. Focus on compound lifts like squats, deadlifts, rows, and presses. Stick to progressive overload and track your volume (Schoenfeld et al., 2016).

Run 2 to 4 times per week. Mix in low-intensity efforts with one quality run that supports your hybrid goals.

Fuel like a hybrid. You’ll need more carbs, more protein, and more total calories than a typical strength-only or endurance-only athlete.

Recover like it matters. Sleep, hydration, and mobility work are non-negotiables if you want to train both ends of the spectrum.

When done right, running can be the gas pedal—not the brake.

Class 5 Performance: For the Athlete Who Trains Smart

We’re not here to pick one lane. We train both systems. We grow, we grind, and we adapt. And we wear gear that moves through both worlds without compromise.

Shop Class 5 apparel built for strength and endurance.

You can build muscle while running.

You just have to respect the balance.

References

Lundberg, T. R., Feuerbacher, J. F., Sünkeler, M., & Schumann, M. (2022). The effects of concurrent aerobic and strength training on muscle fiber hypertrophy: A systematic review and meta-analysis. Sports Medicine, 52(10), 2391–2403. https://doi.org/10.1007/s40279-022-01688-x

Sabag, A., Najafi, A., Hackett, D., et al. (2018). The compatibility of concurrent high-intensity interval training and resistance training for muscular strength and hypertrophy: A systematic review and meta-analysis. Sports Medicine - Open, 4, 38. https://doi.org/10.1186/s40798-018-0156-0

Schoenfeld, B. J., Contreras, B., Krieger, J., Grgic, J., Delcastillo, K., et al. (2021). Concurrent training does not interfere with adaptations in maximal strength and muscle hypertrophy: An updated systematic review and meta-analysis. Sports Medicine, 51(6), 1289–1305. https://doi.org/10.1007/s40279-020-01370-2

Schoenfeld, B. J., Ogborn, D., & Krieger, J. (2016). Effects of resistance training frequency on measures of muscle hypertrophy: A systematic review and meta-analysis. Sports Medicine, 46(11), 1689–1697. https://doi.org/10.1007/s40279-016-0543-8

Sekely, V. & Aguillard, E. (2025). Does running count as leg day? Insights into strength gains from cardio training. SELF Magazine. Retrieved June 11, 2025.

Verywell Health. (2020, September 30). Hypertrophy: Definition, triggers, and tips to boost muscle. Retrieved from https://www.verywellhealth.com/hypertrophy-definition-5188584