Weighted vests are spring 2026's loudest fitness purchase, fueled by TikTok claims that adding load to a walk turns it into a workout [1]. The Associated Press took the question to exercise physiologists. The answer is qualified.

The upside is real but narrow. Walking with 5 to 15 percent of body weight added does increase the energy cost of a session and, in older adults, has been shown to improve bone density and walking economy [1]. For postmenopausal women in particular, vest-walking is one of the few interventions with a documented bone-density signal [1].

The downside is also real. Loading the spine and knees through cumulative steps raises the risk of low-back and knee injury, especially for runners adding vests to existing mileage [1]. Trainers quoted by the AP recommend starting at 5 percent of body weight, capping vests at 10 percent for most adults, and not running with one until the body has adapted to walking with it for several weeks [1].

The verdict, in service-journalism form: a vest is a tool for older walkers who want a bone-density edge and an honest cardio bump. It is not a cardio cheat code. It is not a substitute for progressive resistance training. And the injuries it produces are predictable.

-- NORA WHITFIELD, Chicago