Effects of Chromium Supplementation and Resistive Training on Muscle Strength and Lean Body Mass in Untrained Men

By Ty Sevin, Aug 31, 2021

< Back to Benefits of Strength Training on Chromium Supplementation in Older Adults

M.A. Hallmark, T.H. Reynolds, C.A. Desouza, C.O. Dotson, R.A. Anderson*, M.A. Rogers, FACSM, The university of Maryland, College Park, MD.


Chromium supplementation has been advocated as an aid in the development of muscle strength, lean body mass, and the reduction of body fat. To test its effects, 16 untrained males aged 50-75 years were randomly assigned to receive either a chromium supplement or a placebo during 12 weeks of progressive strength training. The subjects trained 3 times per week, performing 2 sets of 8-10 repetitions on 8 Keiser strength machines.


Total body strength increased by 27% in the group taking chromium supplements and by 37% in the group taking a placebo. Lean body mass (assessed by HYDRO) and percent body fat, did not change significantly in either group as a result of strength training. The sum of 7 skinfold measurements also did not change significantly.


The researchers concluded that 12 weeks of chromium supplementation in conjunction with strength training does not increase lean body mass and muscle strength or decrease percent body fat in young, untrained males.

Keiser Equipment Used

Leg press, chest press, leg curl, leg extension, lat pull down, shoulder press, upper back, hip abductor, triceps and abdominal machines.

Published in Medicine and Science in Sports and Exercise, 28(1); pages 139-144, 1996.

Link to Original Research

About the author

Ty Sevin

Director of Human Performance, Education and Research

Articles by Ty Sevin >

With over 25 years of coaching experience at both the collegiate and Olympic levels, Ty Sevin is one of the most influential track and field coaches in the country. Ty has worked for the United States Olympic Committee, serving as the Director of the Track and Field Residency Program at the USOC Olympic Training Center in Chula Vista, CA. He has also served as an assistant coach for Team USA on three separate occasions, for both the men’s and women’s teams. Ty himself was a four-time U.S. Olympics Trials qualifier in javelin. Ty most recently spent four years as the Associate Head Coach at the University of Texas at Austin for both the men’s and women’s track and field teams. Prior to that, he led the men’s and women’s track and cross-country teams at the University of New Orleans and McNeese State.

Currently, Ty applies his vast industry experience to the role of Director of Human Performance, Research and Education for Keiser Corporation, where he consults with college and professional sports teams regarding the utilization of Keiser strength equipment. He is also responsible for creating educational curriculum relating to human performance and overseeing Keiser research projects