Evaluation of the Reproducibility of Jumping Mechanography (Jump)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01164670
Recruitment Status : Completed
First Posted : July 19, 2010
Last Update Posted : October 5, 2015
Information provided by (Responsible Party):
University of Wisconsin, Madison

Brief Summary:
Sarcopenia, the age-related decline in muscle mass and function (widely recognized as "frailty"), is increasingly being appreciated, primarily in the research environment. Interventions to prevent or treat sarcopenia can be anticipated to reduce falls, fractures and thereby to facilitate independence and improve quality of life for older adults. Unfortunately, there is no current consensus definition of sarcopenia, thereby impeding clinical recognition and treatment. It has been advocated that low appendicular (arm and leg) lean mass, as measured by DXA, be utilized as a clinical diagnostic tool to define sarcopenia. While such an approach is possible, however, muscle strength loss is more rapid than mass loss, indicating deterioration of muscle "quality." Muscle quality may be affected by changes at the neuromuscular, cellular or subcellular levels; parameters not detected by measuring mass alone. Clearly, tools evaluating muscle performance, not simply mass, are needed to optimally identify, and subsequently monitor, treatment of older adults with sarcopenia. While current tests of muscle power/function (e.g., chair-rising, self-selected gait velocity, etc.) do correlate with functional limitation in older adults, these existing tests have limitations in that they cannot be performed in all people, may have "yes/no" results rather than a continuous scale and may not be highly precise. Thus, improved muscle function assessment tools are needed, both clinically and in research venues. Jumping mechanography is very likely one such methodology.

Condition or disease

Study Type : Observational
Estimated Enrollment : 96 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Evaluation of the Reproducibility of Jumping Mechanography in Older Adults and Comparison With Current Functional Assessment Tools
Study Start Date : May 2010
Actual Primary Completion Date : March 2011
Actual Study Completion Date : March 2011

Men over 70 years old.
Women over 70 years old.

Biospecimen Retention:   Samples Without DNA
Serum will be collected for measurement of laboratory studies (serum chemistries, TSH and 25[OH]D),

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Ages Eligible for Study:   70 Years and older   (Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Ambulatory community dwelling adults who are able to stand without assistance. Both men and women age ≥ 70 years from the Madison Wisconsin area. Specifically, participants will be enrolled using the following strata in each gender group: low vitamin D/low functional status (12 men and 12 women), normal vitamin D/low functional status (12 men and 12 women), low vitamin D/high functional status (12 men and 12 women), and normal vitamin D/high functional status (12 men and 12 women). Low vitamin D will be defined as 25(OH)D concentrations < 25 ng/ml, normal vitamin D status will be defined as 25(OH)D concentration of 30 ng/ml or greater. Functional status will be based on screening short physical performance battery (SPPB) score dichotomized at <9 vs. 9 and above.

Inclusion Criteria:

  • Ambulatory, community dwelling men and women age ≥ 70 years
  • Able and willing to sign informed consent
  • Able to stand without assistance

Exclusion Criteria:

  • Abnormalities on screening laboratory assessment deemed to be clinically significant by the study investigators
  • History of myocardial infarction within the prior six months or ongoing angina
  • History of injury or surgery within the prior six months which limits the ability to ambulate
  • History of severe end-organ disease, e.g., cardiovascular, hepatic, hematologic, pulmonary, etc., which might limit the ability to complete this study
  • History of malignancy with metastasis to the musculoskeletal system
  • Neuromuscular disease impairing balance to the degree of not being able to stand without assistance
  • BMD T-score of less than -3.5 at any measured site and a prior hip or vertebral fracture

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01164670

United States, Wisconsin
University of Wisconsin Osteoporosis Clinical Center and Research Program
Madison, Wisconsin, United States, 53705
Sponsors and Collaborators
University of Wisconsin, Madison
Principal Investigator: Neil Binkley, MD University of Wisconsin, Madison

Responsible Party: University of Wisconsin, Madison Identifier: NCT01164670     History of Changes
Other Study ID Numbers: H-2010-0011
First Posted: July 19, 2010    Key Record Dates
Last Update Posted: October 5, 2015
Last Verified: March 2011

Additional relevant MeSH terms:
Muscular Atrophy
Neuromuscular Manifestations
Neurologic Manifestations
Nervous System Diseases
Pathological Conditions, Anatomical
Signs and Symptoms