Pilot Study of Strength Testing in Overweight Women With or Without Insulin Resistance

Obesity Clinical Trial

Official title:

Pilot Study of Strength Testing in Overweight Women With or Without Insulin Resistance

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01862757
• Other study ID #: 130130
• Secondary ID: 13-H-0130
• Status: Completed
• Phase: N/A
• First received: May 23, 2013
• Last updated: June 30, 2017
• Start date: May 6, 2013
• Est. completion date: March 13, 2015

Study information

• Verified date: March 13, 2015
• Source: National Institutes of Health Clinical Center (CC)
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Background:

• Some people who are obese may have decreased muscle strength. They may have greater muscle mass shown in scans, but they show poor results in exercise tests. Poor muscle strength might cause some of the difficulty with exercise performance. Researchers want to test muscle strength in the arms and legs of overweight women. They will also see how insulin resistance affects muscle strength in these women.

Objectives:

• To test muscle strength in overweight women.

• To see if insulin resistance affects muscle strength.

Eligibility:

• Women at least 18 years of age who are overweight (body mass index greater than 25 kg/m2).

Design:

• Participants will be asked to fast before having an initial blood test to measure glucose and insulin levels.

• On a different day, they will have the strength testing. The first test will measure leg muscle strength by testing the quadriceps and the hamstrings. The second test will measure arm muscle strength by testing the biceps and triceps. The final test will measure hand muscle (grip) strength.

• All the tests should take about an hour.

Description:

We have observed in our protocol (08-H-0108: Effects of Worksite Wellness Interventions on Vascular Function, Insulin Sensitivity and High-Density Lipoprotein in Overweight or Obese Women) that despite increased lean (muscle) mass in the extremities as measured by dual x-ray absorptiometry, obese women have poorer exercise tolerance than overweight women who have less muscle mass.1 Exercise testing, however, is an integrated function of cardiopulmonary capacity, in addition to muscle strength and endurance. We propose to determine whether muscle strength of elbow flexors and knee extensor muscle groups correlates with muscle mass of these groups in overweight and obese women selected for normal or abnormal insulin sensitivity. Our hypothesis is that subjects with impaired insulin sensitivity and high insulin levels will have greater muscle mass but lower muscle strength than subjects with normal insulin sensitivity and normal insulin levels. This is a feasibility study to be conducted in 10 non-diabetic women (5 with insulin resistance, 5 with normal insulin sensitivity) who previously participated in 08-H-0108, the outcome of which will provide data for planning a larger study of muscle mass and strength which may be important to achieving exercise goals important to successful weight loss.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 13
• Est. completion date: March 13, 2015
• Est. primary completion date: June 14, 2013
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 18 Years to 70 Years

Eligibility

• INCLUSION CRITERIA:

• Non-diabetic female employees of NIH who participated in protocol 08-H-0108 and underwent insulin sensitivity testing and also protocol 02-H-0050 for muscle mass determination.

• BP< 140/90 mmHg (medications allowed)

• Subject understands protocol and provides written, informed consent.

EXCLUSION CRITERIA:

• Medical or surgical condition that would prohibit upper and lower extremity strength testing (e.g., painful arthritis, prior knee or elbow surgery)

• Infection or injury to hand, knee or elbow requiring medical attention within 3 months of testing

Related Conditions & MeSH terms

• Insulin Resistance
• Obesity
• Overweight

Locations

Country	Name	City	State
United States	National Institutes of Health Clinical Center, 9000 Rockville Pike	Bethesda	Maryland

Sponsors (1)

Lead Sponsor	Collaborator
National Heart, Lung, and Blood Institute (NHLBI)

Country where clinical trial is conducted

United States, 

References & Publications (3)

Kimball SR, Farrell PA, Jefferson LS. Invited Review: Role of insulin in translational control of protein synthesis in skeletal muscle by amino acids or exercise. J Appl Physiol (1985). 2002 Sep;93(3):1168-80. Review. — View Citation

Leon B, Jenkins S, Pepin K, Chaudhry H, Smith K, Zalos G, Miller BV 3rd, Chen KY, Remaley AT, Waclawiw MA, Sumner AE, Cannon RO 3rd. Insulin and extremity muscle mass in overweight and obese women. Int J Obes (Lond). 2013 Dec;37(12):1560-4. doi: 10.1038/ijo.2013.45. Epub 2013 Mar 28. — View Citation

Park SW, Goodpaster BH, Strotmeyer ES, de Rekeneire N, Harris TB, Schwartz AV, Tylavsky FA, Newman AB. Decreased muscle strength and quality in older adults with type 2 diabetes: the health, aging, and body composition study. Diabetes. 2006 Jun;55(6):1813-8. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	To determine whether increased extremity muscle mass associated with obesity, diminished insulin sensitivity and high insulin levels is associated with diminished strength.		ongoing