Quick answer
Cardio burns more calories per session, while weights preserve muscle and improve body composition. For fat loss, a combination beats either alone — diet drives the deficit, cardio adds burn, and weights protect what's underneath.
Key takeaways
- Cardio burns more calories per session.
- Weights preserve muscle and shape.
- A combination beats either alone.
- Diet still drives the deficit.
What each does
Cardio raises your calorie burn during and a bit after a session; weights build and preserve muscle, improving how your body looks and protecting metabolism.
Why both
Cardio without resistance can lose muscle along with fat; weights without any cardio miss easy calorie burn and heart-health benefits. Together they cover both bases.
A simple split
A few strength sessions plus regular walking or cardio you enjoy is a sustainable combo. Let diet lead the deficit and exercise do what it does best.
A note on scope. This is general education for healthy adults, not medical advice, and no supplement is a weight-loss drug or a treatment for obesity or any condition. Sustainable weight change comes from diet, activity, sleep and consistency; a supplement can only support those. Talk to a doctor before starting a supplement, especially if you are pregnant or nursing, take medication, are sensitive to caffeine, or have a health condition.