Body
Weighted vests are showing up more often in fitness classes and on jogging tracks, adding a new kind of challenge to familiar workouts. The idea, according to advocates and social-media influencers, is that wearing a vest with removable weights can help people improve performance and even manage weight—but experts caution that the evidence for many claims remains thin.
In a class created for a nationwide gym chain, exercisers wear weighted vests that increase resistance during training. Jessie Syfko, Life Time gyms’ senior vice president, said in the fitness context that people start to feel the difference because they are working “just a little bit harder and a little bit smarter” without changing what their routines are.
Syfko’s comments reflect how weighted vests are marketed to everyday gymgoers: the gear is designed to add resistance to the torso, through pockets that hold removable weights. While that concept can sound straightforward—adding load to your movement patterns—experts say it is not clear how much of the hype is justified, especially outside of athletics.
Jeff Monaco, a certified strength coach who teaches medical fitness at the University of Texas at Austin, said weighted vests may offer benefits, but he framed them as incremental rather than transformative. He said resistance from a weighted vest may result in better sports performance over time, pointing to “a lot of studies” on weighted-vest training in athletics such as soccer, where speed, agility and changing direction matter.
Monaco said people may start to see those benefits by adding about 10% of their body weight to the vest. He illustrated the approach by saying that for someone who weighs 150 pounds, the total added weight would be about 15 pounds.
Outside sports performance, Monaco and other experts said the research is less clear. One example cited from Wake Forest University School of Medicine in North Carolina found that adults ages 60 to 85 who wore weighted vests at times during the day when they were most active lost about the same amount of weight as adults who did not use weighted vests.
That same 2020 study also found similar changes in bone density between the weighted-vest group and those who did not use the vests, a marker that can decline as people age but that building muscle can help slow. The takeaway experts described is that the vest is not a shortcut to weight loss or a guarantee of better bone outcomes.
When it comes to safety, experts urged people to use weighted vests carefully rather than treat them like a one-size-fits-all add-on. It’s best to start by adding between 5% and 10% of body weight, experts said, because wearing a vest that is too heavy can strain joints, the back and hips, potentially throwing off posture and form.
Dr. Elizabeth Gardner, a team physician for athletes at Yale University, said some people should consult with a doctor before using a weighted vest. She included pregnant people and those with heart and breathing conditions or back or neck injuries, and she said using the vest effectively requires abdominal muscle engagement, which can be tougher for people managing back pain.
Monaco said guidance from someone experienced with weighted vests can help people confirm that their movements and form are correct and that they have enough upper-body strength and endurance to support the movements. Still, he said that as long as the vest is used correctly, it can be “a good tool to have in your toolbox.”