Reference Values and Reliability of Handgrip Strength Assessment Using a Digital Dynamometer in Healthy Adolescents and Other Populations: A Pilot Observational Study
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 50
- 试验地点
- 1
- 主要终点
- Maximal Isometric Muscle Strength (Handgrip and Lower Limb)
研究概览
简要总结
his study aims to establish reference values and examine the reliability of handgrip strength assessment using a digital dynamometer (VALD DynaMo) in healthy adolescents.
Participants will undergo standardized strength evaluations of upper and lower limbs, following international testing guidelines.
Descriptive variables such as age, sex, height, weight, hand dominance, and physical activity level will also be recorded.
The results will contribute to developing normative data and validating the use of portable dynamometry for musculoskeletal health assessment, with potential future applications in clinical populations.
详细描述
Muscle strength is a key indicator of musculoskeletal health and functional capacity across the lifespan. Handgrip strength, in particular, is widely recognized as a simple and reliable marker of overall strength and health status.
However, normative reference values vary across populations, and limited data exist for adolescents in local or regional contexts.
This observational study will collect handgrip and lower limb strength data using the VALD DynaMo portable dynamometer. The measurements will follow standardized testing positions (American Society of Hand Therapists protocol) to ensure reliability and comparability.
The project will also serve as a pilot for future research on populations with musculoskeletal, neurological, or oncological conditions, where muscle strength is often compromised.
Participation is voluntary, non-invasive, and without associated risk. All data will be anonymized and stored securely for research purposes only.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Crossover
- 时间视角
- Prospective
入排标准
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Healthy adolescents aged 15-16 years (for the current phase).
- •Ability to understand and follow verbal instructions.
- •Written informed consent provided by parent or legal guardian (for minors).
- •Assent given by the adolescent participant.
- •In future extensions: individuals aged 10-80 years, including those diagnosed with musculoskeletal, neurological, or oncological conditions, able to safely perform isometric contractions.
排除标准
- •History of acute or chronic upper or lower limb injury in the last 6 months.
- •Neurological, cardiovascular, or systemic disorders that may limit maximal effort.
- •Current pain, inflammation, or post-surgical condition affecting muscle performance.
- •Cognitive or communication impairments preventing valid testing.
- •Refusal or withdrawal of informed consent at any point.
研究组 & 干预措施
Healthy Adolescent Group
A single group of healthy adolescents will participate in the study. Each participant will undergo standardized assessments of upper and lower limb muscle strength using digital dynamometry. No treatment or intervention will be applied.
干预措施: Muscle Strength Assessment using Digital Handheld Dynamometry (VALD Dynamo®) (Diagnostic Test)
Clinical Population Group (Future Recruitment)
This group may include participants with musculoskeletal, neurological, or oncological conditions in future phases of the study. The same standardized dynamometry protocol will be applied to compare muscle strength profiles and assess the applicability of the measurement tools in clinical populations.
干预措施: Muscle Strength Assessment using Digital Handheld Dynamometry (VALD Dynamo®) (Diagnostic Test)
结局指标
主要结局
Maximal Isometric Muscle Strength (Handgrip and Lower Limb)
时间窗: Single testing session (baseline).
Peak isometric force (in Newtons or kilograms) recorded using a VALD Dynamo® handheld digital dynamometer. Measurements will follow standardized positioning protocols recommended by the American Society of Hand Therapists (ASHT) for upper limb and by recent literature for lower limb testing. Each participant will perform three maximal voluntary contractions per muscle group, with the highest value recorded for analysis. Unit of Measure: Newtons (N) or Kilograms.
次要结局
- Test-Retest Reliability of Muscle Strength Measures. Maximal Isometric Muscle Strength Handgrip(Two sessions separated by 7-14 days.)
- Descriptive Anthropometric and Activity Variables(Collected at baseline (single session).)
- Clinical Applicability (Optional Future Arm). Maximal Isometric Muscle Strength (Handgrip)(To be determined in future phases)
研究者
Alejandro Caña Pino
Investigator
University of Extremadura