It seems like weighted vests are trending every few years. From being used as an accessory for rucking and endurance training to being promoted as a game-changing tool for fat loss, they are always lingering in the background of the fitness industry. More recently, the increasing popularity of high-intensity functional fitness modalities like Hyrox training has given weighted vests a notable boost in visibility and mainstream popularity. The claims surrounding weighted vests are often quite extreme, promising rapid muscle building and bone strengthening effects, massive increases in energy expenditure, and the typical hyperbolic marketing jargon that consumers so often see with any new fitness trend.
But are weighted vests actually anything more than just another accessory fitness tool primarily suited for individuals who are already lifting weights and maintaining a robust, physically active lifestyle?
Before delving deeply into the scientific literature, the journey often begins with personal trial and error. Many fitness enthusiasts purchase a weighted vest without conducting thorough due diligence. Intuition frequently takes the best of people, leading them to think that they might as well add a significant amount of weight to their daily walks for extra health gains.
However, when looking to find peer-reviewed literature to support what intuitively feels like it should make sense, many are surprised to see that there is actually not an overwhelming body of research supporting weighted vests as a true game-changer for health gains when it comes to casual walking while wearing one. A small 2006 study of just 10 people did report some physiological effect of wearing a weighted vest at faster walking speeds on oxygen consumption. Meanwhile, a study examining older adults actually found that wearing a weighted vest did not really do much more for general physical function than going without one.
That said, there is some evidence in the literature suggesting that wearing a weighted vest may have beneficial effects on running economy in distance runners, as well as a few isolated proxies of athletic performance in sports like soccer. But as far as supercharging the fundamental health and metabolic benefits of a routine walk around the neighborhood? As the current data stands, that does not seem to be the case.
The conversation naturally shifts toward weight maintenance and weight loss, which is where much of the modern marketing hooks consumers. A 2024 paper looked closely at the metabolic cost of walking with weighted vests and found that the energy cost of vest loading increased in a nonlinear fashion, being roughly proportional to the total load carried. Mainstream media outlets quickly covered the study with catchy titles along the lines of "Weighted walking found to increase energy burn by over 40%!" Yet, the reality of the underlying data may not be nearly as exciting as the headlines suggested.
To understand why, it helps to look at the methodology. The authors of the study had active military-age men and women walk on treadmills with either no vest at all or with loads equivalent to 22%, 44%, and 66% of their total body mass—vastly heavier than a typical consumer weighted vest. To put these figures into a realistic perspective, a separate study on older adults looking at the effect of weighted vests on weight loss and body composition defined light vests as roughly 1% of the participants’ body weight and heavy vests as 11%. Therefore, unless an individual is planning on strapping on and carrying around more than 40% of their total body weight for long periods of time, they are unlikely to burn more than a few extra calories during a standard walk. While it is true that in some specific contexts even a few extra calories may be meaningful, it remains far from a revolutionary game-changer when it comes to clinical or practical weight loss.
Speaking more broadly about weight loss, the study in older adults mentioned previously did note that participants who wore a classified heavy vest lost more overall body weight and fat mass while simultaneously gaining a modest amount of fat-free mass. Contrastingly, a different study in older adults, which specifically looked at the effects of wearing a weighted vest for approximately 10 hours per day while adhering to a calorie-restricted diet, found no significant differences in total weight lost or overall body composition changes between the experimental and control groups. Interestingly, and as published in a separate paper years later, those individuals who wore the weighted vest during the trial managed to maintain better and more stable weight loss in the two years following the conclusion of the study.
When weighing all the available evidence, weighted vests are likely not a piece of equipment that everyday fitness enthusiasts need to prioritize, especially if they are already physically active and engaging in regular, structured resistance training. They certainly can serve as a practical way to add variety to a cardio routine or introduce progressive overload to body weight calisthenics, but the scientific community still needs a substantial amount of rigorous research before suggesting anything beyond those specific use cases.
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