Effects Of Strength Training On Glucose And Chromium Metabolism In Males 53-63 Years Of Age

By Ty Sevin, Aug 31, 2021

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M.A. Rubin, J.P. Miller, A.R. Smith, M.E. Smith, K.Y. Patterson, R.E. Pratley, BJ. Hurley, C. Veillon, R.A. Anderson and P.B. Moser-Veillon. BHNRC Vitamin/Mineral Lab, Beltsville, Maryland 20705, University of Maryland, College Park, Maryland 20742.

Objectives

The purpose of this study was to determine the effects of 16 weeks of strength training on body composition, glucose tolerance, insulin response and chromium metabolism in healthy, sedentary males 53-63 years of age. Before training blood levels of glucose and insulin were measured twice; after a 12 hour fast, and during an oral glucose tolerance test. These tests were repeated approximately 20 hours after the last training session. A metabolic tracer was used to measure levels of Chromium metabolism through urine samples. Samples were taken pre and post training both after a single session of strength training and after the full 16 week program. Using Keiser machines, subjects strength trained 3 times per week, exercising all major muscle groups at 90% of their 3 repetition maximum.

Results

Strength increased 41%, body weight and maximum aerobic capacity did not change. Fat free mass increased 2.6% and body fat decreased 1.6%. Strength training did not change fasting glucose or the area under the glucose curve. Fasting insulin levels were not different, however insulin was used significantly more efficiently and blood insulin levels at 30 and 90 minutes were reduced. There was no significant correlation between body composition and insulin response. Strength training did not significantly effect urinary excretion of chromium.

Summary

The improvement in insulin response appears to be independent of changes in body composition and urinary chromium excretion. It is clear however that strength training promotes more efficient distribution and utilization of insulin which has implications for prevention and management of diabetes.

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 Annual Meeting of the Federation of the American Society for Experimental Biology, 1993. This abstract received the American Institute of Nutrition Graduate Student Research Award.


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