Cardio for Fat Loss: What Actually Works

Fat Loss & Training  ·  5 min read  ·  builtculture.org

The cardio conversation in fitness is one of the most confusing — partly because influencers have overcomplicated it for content, and partly because the wrong kind of cardio genuinely does interfere with your goals.

Let's start with the basics. Cardio burns calories, and burning more calories supports fat loss when you're in a calorie deficit. But it's not the most efficient method. Strength training builds muscle, which raises your basal metabolic rate — meaning you burn more calories even at rest. The combination of both is optimal.

LISS (Low-Intensity Steady-State) cardio — walking, light cycling, swimming at a moderate pace — is highly effective for fat loss and very easy to recover from. It doesn't fatigue your muscles the way high-intensity work does, so it won't interfere with your strength training. 30-60 minutes, 3-4 times per week, is a solid protocol.

HIIT (High-Intensity Interval Training) burns more calories in less time and continues to burn calories at an elevated rate for hours after the session (the afterburn effect). But it's also much more taxing on your nervous system. Limit HIIT to 2 sessions per week maximum if you're also strength training.

Zone 2 cardio — maintaining a conversational pace where your heart rate sits around 60-70% of max — has received significant attention in recent research for its metabolic and longevity benefits. It improves your body's ability to use fat as a fuel source and supports cardiovascular health without the recovery cost of higher-intensity work.

The best cardio is the kind you'll actually do consistently. If you hate running, you're not going to run 4 days a week long-term. Find a modality you can sustain — swimming, hiking, cycling, rowing — and make it a habit.

One often-overlooked cardio strategy: simply walk more. Increasing your daily steps from 5,000 to 10,000 can add a 300-500 calorie daily burn without any dedicated gym time. It adds up dramatically over weeks and months.

Step goal: Aim for 8,000-10,000 steps per day as your baseline. Use it as passive calorie burning that stacks on top of your training sessions.

→ Want a cardio plan that complements your strength training? Built Culture trainers design both. Visit builtculture.org/services