Sorry, But Your Strength Training Isn't Cardio — Here's Why It Matters

Reported by MindBodyGreen.

You finish your last squat, heart pounding, lungs on fire, entire body soaked — and the thought crosses your mind: does this even count as cardio? It's a fair question, and one a lot of women are getting wrong in ways that quietly matter for their long-term health. The honest answer, according to MindBodyGreen, is no — strength training and cardio are not interchangeable, and understanding why could reshape how you approach your entire routine.

The distinction comes down to physiology, not effort. Aerobic exercise — running, cycling, incline walking — demands a continuous, sustained oxygen supply. Your heart adapts by pumping more blood per beat, your muscles grow denser with mitochondria, and your VO2 max climbs. That last metric isn't just a fitness flex; it's one of the strongest predictors of longevity we have, consistently linked to lower risk of cardiovascular disease and early death. Resistance training works differently. Heavy lifts are intense but brief, drawing on anaerobic energy systems and creating intermittent pressure spikes rather than a sustained aerobic demand. A racing heart during your deadlift set is real — but it's not the same physiological stimulus, and the pattern of stress is what drives adaptation. Research shows aerobic training produces meaningfully greater improvements in VO2 max and cardiorespiratory endurance than lifting alone.

What lifting actually does for your heart

Resistance training isn't letting your cardiovascular system down — it's just doing a different job. Building muscle increases your body's capacity to store and process glucose efficiently, improving insulin sensitivity and reducing risk for type 2 diabetes and heart disease. It also lowers resting blood pressure over time, and structurally, it thickens the heart wall in response to high-pressure demands — a distinct adaptation from the expanded chamber volume aerobic training produces. Both are genuinely useful. Neither is optional if longevity is the goal.

The practical target most major health organizations align on: 150 minutes of moderate cardio weekly (or 75 minutes at higher intensity), plus at least two strength sessions. Spread across seven days, that's less daunting than it sounds. For cardio, format is irrelevant — a hike, a swim, pickleball, a podcast walk — what matters is consistency. Zone 2 pacing, the effort level where conversation is possible but breathing is noticeable, is especially effective for building an aerobic base. For strength, progressive overload and compound movements — squats, deadlifts, rows, presses — will always outperform any perfectly curated program you can't sustain. Short on time? Lift first, then stack 20–30 minutes of cardio after. Not optimal, but it works.

Doing both isn't just additive — the research suggests the benefits are synergistic, with people who combine regular cardio and strength training showing lower risk of heart disease and early death than those committed to only one. Your lifting routine is building something real and worth protecting; cardio is what fills in the gaps it leaves behind.

Read the original at MindBodyGreen.