If you ask ten different fitness influencers how much cardio do you need, you’ll get ten different answers. Daily fasted runs. Zone 2 training for hours per week. HIIT every other day. No cardio at all, just lift.

The noise is real. The confusion is understandable.

Let’s cut through it with what the actual research recommends — and what that looks like in a real person’s real week.

THE OFFICIAL GUIDELINES

The American Heart Association and the World Health Organization both recommend the following for cardiovascular health in healthy adults:

150-300 minutes of moderate-intensity aerobic activity per week, OR 75-150 minutes of vigorous-intensity aerobic activity per week, OR an equivalent combination of both.

Plus: muscle-strengthening activities (strength training) at moderate or greater intensity on two or more days per week.

That’s the health baseline. Not performance. Not fat loss. Just the amount of exercise associated with meaningfully reduced risk of cardiovascular disease, type 2 diabetes, some cancers, and all-cause mortality.

WHAT DOES THAT ACTUALLY LOOK LIKE?

Moderate intensity: You can talk in short sentences but couldn’t hold a full conversation. A brisk walk, easy cycling, recreational swimming. Roughly 50-70% of your maximum heart rate.

150 minutes of moderate intensity = 30 minutes, five days per week. Or 50 minutes, three days per week.

Vigorous intensity: Conversation is difficult. Hard run, fast cycling, intense group fitness class. Roughly 70-85% of maximum heart rate.

75 minutes of vigorous intensity = 25 minutes, three days per week.

Important note: these guidelines didn’t specify the type of activity — just the intensity and duration. Brisk walking counts. A challenging strength training session counts. Recreational sports count. The gym isn’t the only option.

THE KEY INSIGHT MOST PEOPLE MISS

The guidelines separate aerobic activity and strength training as distinct recommendations. Both are required for optimal health outcomes — not one or the other.

This is where most people’s understanding breaks down. They think it’s a choice: do cardio for health, or lift for strength. The research is clear that you need both, working together, for the best long-term outcomes.

The good news: you don’t need separate sessions for both. A well-designed strength training session with compound movements and limited rest between sets can satisfy both the strength training and a significant portion of the cardiovascular guidelines simultaneously.

At Forge, that’s exactly how we program. The strength work is the training. The elevated heart rate and cardiovascular demand come as a built-in part of doing it correctly.

WHAT ABOUT WEIGHT LOSS?

This is where the guidelines become less useful, because weight loss is primarily driven by diet — not exercise.

Exercise, including cardio, contributes to the calorie deficit that drives fat loss. But the contribution is smaller than most people expect. A 45-minute hard training session burns roughly 300-500 calories for most people. One fast food meal can exceed 1,200 calories.

More cardio is not the solution to a nutrition problem.

That said, cardio does contribute to fat loss in important ways beyond direct calorie burn:

It preserves or builds muscle tissue (especially when it includes strength components), which keeps metabolism elevated.

It improves insulin sensitivity, which improves how your body handles and stores carbohydrates.

It reduces stress hormones that drive fat storage — particularly around the abdomen.

The most effective fat loss approach combines a moderate calorie deficit through nutrition, consistent strength training to preserve muscle, and cardiovascular activity sufficient to meet the health guidelines.

How much cardio do you need to exceed guidelines?

For health: once you’re meeting the 150/75 minute guidelines consistently, the additional benefit per additional hour of cardio diminishes significantly. You get most of the cardiovascular health benefit from meeting — not dramatically exceeding — the guidelines.

For athletic performance: training for a specific event or sport requires more specific programming. If you’re training for a 5K, a sport, or cardiovascular performance, you’ll need more targeted cardio work beyond the minimum guidelines.

For weight loss acceleration: more activity can help, but only if it doesn’t drive compensatory eating (which is real — people who do significant amounts of cardio often eat more to compensate) and doesn’t lead to injury or burnout.

THE HONEST ANSWER FOR MOST PEOPLE

If you’re currently doing consistent strength training three days per week — and doing it with compound movements, appropriate loading, and minimal rest — you’re likely already getting a significant cardiovascular stimulus.

Add daily walking (which research consistently shows has profound health benefits and doesn’t interfere with strength training recovery) and you’re probably close to the guidelines without ever getting on a treadmill.

For people who enjoy cardio activities, adding 1-2 dedicated sessions per week of something you enjoy — cycling, swimming, recreational sports, group fitness — sits on top of that foundation.

For people who hate cardio: focus on building density in your strength training (more work, less rest), walk regularly, and don’t add activities you’ll resent and eventually abandon.

The best cardio is the kind you’ll actually do consistently over years.

AT FORGE

Our group training classes are designed to provide the cardiovascular stimulus you need as part of the overall training session — not as an afterthought. The conditioning pieces built into each class are purposeful, progressive, and scaled to appropriate intensity for each person.

You don’t need to add separate cardio sessions unless you have specific goals that require them.

Come in for a free no sweat intro at forge-fitness.net and let’s talk about what your cardiovascular health picture looks like and what the right approach is for your specific situation.