A Study of Motor Unit Recruitment During Isometric Contractions in Human Muscles


  • Study type

  • Study IDs

  • Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.
  • Site IRB
    • Rochester, Minnesota: 14-009539
    Sponsor Protocol Number: 14-009539

About this study

The purpose of this study is to investigate motor unit recruitment during  isometric contractions in human muscles.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

Inclusion Criteria

  • Control group
    • 21 to 40 years of age
    • Good neuromuscular health
  • Elderly group
    • 40 to 80 years of age
    • Good neuromuscular health


Exclusion Criteria

  • History of central or peripheral neuropathy, myopathy, or musculoskeletal pathology
  • Current use of medications that affect muscle strength (e.g. corticosteroids, statins)
  • History of surgery of the right upper or lower extremities
  • Bleeding disorders
  • Current use of blood-thinning medications

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Kenton Kaufman, Ph.D.

Open for enrollment

Contact information:

Kenton Kaufman Ph.D.



More information


Publications are currently not available

Study Results Summary

Not yet available

Supplemental Study Information

Not yet available


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