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Related Experiment Video

Updated: Jun 12, 2026

3D Ultrasound Imaging: Fast and Cost-effective Morphometry of Musculoskeletal Tissue

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Published on: November 27, 2017

Weight Loss Before Basic Combat Training and Musculoskeletal Injuries Among U.S. Army Trainees: The ARMI Study.

Vy T Nguyen¹, Ashley A Donovan¹, Kathryn M Taylor¹

¹Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts, USA.

Obesity (Silver Spring, Md.)

|July 31, 2025

Summary

Losing weight before Army Basic Combat Training (BCT) is associated with fewer musculoskeletal injuries (MSKI). The rate of weight loss did not significantly impact injury risk during this demanding training period.

Keywords:

military training musculoskeletal injury weight loss

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Area of Science:

Military medicine
Sports medicine
Injury prevention

Background:

Military recruits often undergo significant physical exertion during Basic Combat Training (BCT).
Pre-training weight loss is common among individuals seeking to meet military entry standards.
Musculoskeletal injuries (MSKI) are a significant concern during physically demanding military training.

Purpose of the Study:

To examine the relationship between pre-enlistment weight loss and the incidence of MSKI during U.S. Army BCT.
To determine if the rate of weight loss influences MSKI risk in new military trainees.

Main Methods:

Retrospective cohort study of 3168 Army trainees.
Self-reported pre-training weight loss data collected.
Musculoskeletal injury diagnoses tracked via electronic medical records.
Cox regression models adjusted for covariates and stratified by sex and pandemic status.

Main Results:

26.16% of trainees reported pre-training weight loss (mean 9.06 kg), primarily through exercise.
Trainees who lost weight had significantly lower rates of overall MSKI (HR: 0.86) and lower extremity MSKI (HR: 0.84) during BCT.
The weekly rate of weight loss was not associated with MSKI risk.

Conclusions:

Pre-training weight loss may reduce the risk of MSKI in military recruits undergoing BCT.
Gradual weight loss prior to training does not appear to increase injury risk.
These findings support weight management strategies for injury prevention in military populations.