Study of the Validity and Reliability of Two Digital Dynamometers in Older People

NCT06623019 | Completed

• 1 other identifier: USalamancaValidityDinamometers
• Study Type: observational
• Target: 413
• Locations: 1 country
• Sites: 1

Brief Summary

It is a cross-sectional, randomized, and single-center study with a duration of 6 months. The study will follow the STROBE guidelines for cross-sectional studies and CONSORT 2024. The main objective is to evaluate the validity and reliability of two devices in measuring grip strength and muscle fatigability in community-dwelling older adults.The study will include community-dwelling older adults of both sexes over 60 years of age.

Conditions

Frailty; Sarcopenia; Old Age; Debility

Keywords

Muscle Strength Dynamometer; Hand Strength; aged; Muscle Fatigue; Jamar

Outcome Measures

Primary Outcomes (1)

• 2. Hand grip test

  Measurement of hand grip strength using a hand-held dynamometer. Values shall be recorded with all three devices.

  2 weeks

Secondary Outcomes (5)

• Body Mass Index (BMI)

  2 weeks

• 4. Appendicular Skeletal Muscle mass Index (SMI)

  2 weeks

• 30 seconds chair stand test (30sCS)

  2 weeks

• Fatigue resistance (FR)

  2 weeks

• Grip work (GW)

  2 weeks

Study Arms (1)

Device 1, Device 2 and Jamar®

As this is a validation study, both criterion, inter-observer and intra-observer validation will be performed. Initially, three repetitions will be performed with each device, leaving between 3 and 5 minutes of rest between devices. 20-30 minutes later, the same process will be repeated but with another researcher giving the orders (interobserver reliability). A few days later the same process is repeated with the first investigator (intra-observer reliability). No person will receive any treatment.

Diagnostic Test: Validation and reliability

Interventions

Validation and reliability DIAGNOSTIC_TEST

As this is a cross-sectional validation study, there is no intervention.

Device 1, Device 2 and Jamar®

Eligibility Criteria

• Age: 65 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Community-dwelling older adults of both sexes over 60 years of age.

You may qualify if:

• Community-dwelling older adults of both sexes over 60 years of age.

You may not qualify if:

• Those who do not understand the orders given to them by the researcher or present an obvious advanced state of dementia.
• Those people who have amputation in one of the two upper limbs or who cannot perform manual grasping for any reason.
• Those who have had an episode of pain in one of the hands during the week prior to the measurement.
• Those who, due to any illness, prevent or contraindicate maximum resistance exercises.
• Any other cause that the research team assesses that may affect the results.

Sponsors & Collaborators

• University of Salamanca: lead

Study Sites (1)

University of Salamanca

Salamanca, Salamanca, 37007, Spain

Location

Related Publications (1)

• Polo-Ferrero L, Mendez-Sanchez R, Martin-Vallejo J, Torres-Alonso J, Carrera-Villegas MB, Barbero-Iglesias FJ, Cruz-Jentoft AJ, Montero-Errasquin B. Validity, reliability, and diagnostic accuracy of the InGrip digital dynamometer compared with the Jamar hydraulic model in older adults. Eur Geriatr Med. 2026 Feb 26. doi: 10.1007/s41999-025-01403-9. Online ahead of print.

  PMID: 41746539 DERIVED

MeSH Terms

Conditions

Sarcopenia; Frailty

Condition Hierarchy (Ancestors)

Muscular Atrophy; Neuromuscular Manifestations; Neurologic Manifestations; Nervous System Diseases; Atrophy; Pathological Conditions, Anatomical; Pathological Conditions, Signs and Symptoms; Signs and Symptoms; Pathologic Processes

Study Officials

• Luis Polo-Ferrero, PhD

  University of Salamanca

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor

Study Record Dates

• First Submitted: September 19, 2024
• First Posted: October 2, 2024
• Study Start: December 16, 2024
• Primary Completion: March 31, 2025
• Study Completion: April 15, 2025
• Last Updated: December 18, 2025

Record last verified: 2025-12

Locations

ES (1)