Metabolic Cost of Walking With Weighted Vests

The authors investigated the metabolic cost of walking while wearing weighted vests to determine if this intervention provides meaningful health benefits for active individuals. This inquiry addresses a growing trend in fitness where weighted vests are marketed as tools for fat loss and enhanced energy expenditure, particularly within contexts like Hyrox training and rucking.

Researchers utilized a study design involving active military-age men and women who walked with either no vest or vests carrying 22%, 44%, and 66% of their body mass. This approach allowed the authors to quantify how varying loads affect oxygen consumption and energy expenditure during walking tasks.

The primary findings indicated that the energy cost of vest loading increased in a nonlinear fashion, roughly proportional to the load carried. While mainstream media reported increases in energy burn exceeding 40%, the study clarified that such significant caloric expenditure requires carrying substantial weight relative to body mass. The authors noted that this effect is not observed with lighter loads typically used in general fitness contexts.

Limitations of the current research include the high intensity required to achieve metabolic benefits, as participants carried over 40% of their body weight for extended periods. Previous studies on older adults found no significant differences in physical function or weight loss when wearing light vests compared to those without them. Additionally, conflicting evidence exists regarding long-term weight maintenance and body composition changes after vest intervention.

The authors conclude that weighted vests are unlikely to provide substantial health benefits for individuals already engaged in resistance training or physically active lifestyles. While they may serve as a method to add resistance to bodyweight exercises or spice up cardio routines, further research is needed to confirm their efficacy beyond these limited applications.