Do Weighted Vests Actually Work? What the Science Says

Weighted vests have been part of training for years, but recently I came across a commentary from Dr. Len Kravitz published by the American College of Sports Medicine (ACSM) that breaks down what the research actually says about them.

Yes — Len Kravitz, no, not that Lenny Kravitz. Different kind of performance.

The article caught my attention because it separates real physiological benefits from exaggerated claims, something that’s often missing in online fitness discussions.

If you want to read the original commentary, you can find it here:

ACSM Hot Topic: Are Weighted Vests Worth the Hype?

Let’s break down the key takeaways and what they mean for someone considering using a weighted vest in their training.

Do Weighted Vests Burn More Calories?

Yes — but the increase is moderate, not dramatic.

Research referenced by ACSM shows that walking with a weighted vest equal to about 15% of body weight increases energy expenditure by roughly 12%. Some studies using slightly heavier loads report increases of around 13%.

To put that into practical terms:

If you normally burn about 300 calories during a walk, wearing a weighted vest might increase that to roughly 330–340 calories.

Helpful? Yes.
Game-changing? Not really.

This is why weighted vests shouldn’t be seen as a shortcut for weight loss. Sustainable fat loss still depends on nutrition, consistency, and a structured training plan.

Where weighted vests really become valuable is in how they can change the training stimulus.

A Low-Impact Way to Increase Cardiovascular Intensity

One of the biggest benefits of using a weighted vest is that it allows you to increase cardiovascular demand without increasing impact on the body.

When extra weight is added to your torso, every step requires more work from the muscles in the legs and hips. That added mechanical demand increases:

• Oxygen consumption
• Heart rate
• Overall cardiovascular workload

In other words, the body has to work harder to move the same distance.

This makes weighted vests particularly useful for people who want to improve their aerobic fitness but don’t want the joint stress associated with running or high-impact exercise.

For example, weighted vest walking can be beneficial for:

• Individuals getting older who want to protect their joints
• People returning to exercise after injury
• Beginners who aren’t ready for running
• Anyone looking for a lower-impact conditioning option

One of the most effective ways to use a weighted vest is incline walking on a treadmill.

Research discussed in the ACSM article suggests that combining a moderate incline (around 5–10%) with a vest weighing about 10% of body weight can significantly increase energy expenditure while still feeling manageable for most people.

This type of workout increases cardiovascular intensity while keeping impact relatively low.

Weighted Vests as a Strength and Conditioning Tool

Weighted vests aren’t just useful for walking workouts. They can also play a role in strength and conditioning training.

One reason they’re effective is that they allow you to progressively overload bodyweight exercises.

Progressive overload is one of the core principles of strength training. It simply means gradually increasing the demands placed on your muscles so they continue adapting.

A weighted vest allows you to do that without needing additional equipment.

For example:

• Bodyweight push-ups can become weighted push-ups
• Air squats can become loaded squats
• Lunges and step-ups become more challenging
• Stair climbing becomes a strength and conditioning exercise

Weighted vests can also increase the difficulty of isometric exercises, where muscles hold a position rather than move through a range of motion.

Examples include:

• Planks
• Side planks
• Wall sits
• Static lunges

In these situations, the added weight increases the demand on the core and stabilizing muscles, forcing them to work harder to maintain proper posture and alignment.

Ignore the “Wear It All Day” Advice

Every now and then you’ll see someone online suggesting that wearing a weighted vest all day will help burn extra calories.

In reality, that advice is mostly just attention-grabbing content.

Weighted vests are designed to be used during structured exercise, not as something you wear while going about your entire day.

Daily activities involve a lot of twisting, bending, and uneven movement patterns. Adding extra weight during those movements doesn’t provide meaningful training benefits and can simply place unnecessary stress on joints and muscles.

A good rule of thumb is simple:

Use a weighted vest when you’re training and there is a clear purpose for the added load.

Train Smarter with MaxWell Nutrition Unlimited

Weighted vests are most effective when they’re used as part of a well-structured training program that includes strength training, conditioning, and proper nutrition.

That’s exactly what we focus on inside MaxWell Nutrition Unlimited.

Members get access to multiple strength and conditioning programs designed to help you build strength, improve conditioning, and develop long-term sustainable fitness.

One of the flagship programs inside the platform is Strong & Lean, a gym-based program designed to help you:

• Improve VO₂ max and cardiovascular conditioning
• Build balanced full-body strength
• Improve posture and movement quality
• Reduce injury risk through smarter programming

All programs are delivered through the MaxWell Nutrition App, which includes guided workouts, exercise demonstrations, and integrated nutrition tools.

When you become a member of MaxWell Nutrition Unlimited, you’ll receive:

• Access to multiple strength and conditioning programs inside the MaxWell Nutrition App
• A free digital copy of the Strong & Lean e-book (normally $80)
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Membership is $250 per year, giving you a full year of structured training programs and resources designed to help you train smarter and stay consistent.

Learn more at MaxWellNutrition.com.