Effects Of Strength Training On Bone Mineral Density: Hormonal And Bone Turnover Relationships

By Ty Sevin, Aug 30, 2021

< Back to Benefits of Strength Training on Bone Density in Older Adults

A. Smith, M. Smith, M. Rubin*, J. Miller, B. Nicklas, R. Pratley*, C. Libanati*, C. Gundberg*, J. Hagberg FASCM, M. Blackman* & B. Hurley FASCM, Univ. of Maryland, College Park, MD.


The effects of a 16-week strength training program on bone mineral density was tested in 21 healthy men aged 50-75 years, with 16 other similar aged men serving as inactive controls. Several hormone levels were tested before and after training. In addition markers of bone formation and a marker of bone resorption were measured to assess bone turnover.


Body weight did not change with training, but percent body fat decreased and lean mass increased. There was a slight increase in a measure of aerobic capacity and a 38% increase in strength. The training program resulted in a 2.8% increase in femoral neck bone mineral density but there were no significant changes in total body or other site measures of bone mineral density. There were no significant changes in hormone levels or markers of bone formation, but there was an increase in the marker of bone resorption. There were no changes in any of the variables in the control group except for an increase in the marker of bone resorption equal to that of the exercise group.


Strength training increases femoral neck bone mineral density in older men. This effect is not connected to changes in blood levels of hormones, or markers of bone formation or resorption. This study confirms the findings of study # 17.

Keiser Equipment Used

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

Presented at the 40th Annual Meeting of the American College of Sports Medicine, 1993. Published in Medicine and Science in Sports and Exercise, vol. 25(supplement), pg. S-188, May 1993.

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