The Relationship Between Daily Smartphone Use Duration and Dominant Hand Grip Strength, Thumb Strength, Wrist and Thumb Proprioception in Young Adults
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 84
- 试验地点
- 1
- 主要终点
- Hand Grip Strength
研究概览
简要总结
This observational cross-sectional study aims to investigate the relationship between daily smartphone usage duration and hand function parameters in young adults. Specifically, the study will examine the association between smartphone screen time and dominant hand grip strength, thumb strength, and wrist and thumb proprioception. Healthy individuals aged 18-35 years will be included. All participants will undergo a single-session assessment including measurement of smartphone usage duration, hand grip strength, pinch strength, and joint position sense of the wrist and thumb. The findings are expected to provide insight into the potential effects of prolonged smartphone use on hand function and proprioceptive performance in young adults.
详细描述
The widespread use of smartphones in daily life has increased significantly, particularly among young adults. While these devices provide convenience and accessibility, excessive smartphone use has been associated with various musculoskeletal and functional impairments, particularly in the upper extremity. Repetitive thumb movements, sustained grip positions, and prolonged device use may negatively affect muscle strength, joint proprioception, and overall hand function. Previous studies have reported that excessive smartphone use may lead to decreased grip strength, altered thumb mechanics, and impaired proprioception. However, there is limited research directly examining the relationship between objectively measured smartphone usage duration and detailed hand function parameters. This study is designed as a cross-sectional, observational, and analytical investigation. Healthy individuals aged 18-35 years will be recruited. Participants with a history of upper extremity injury, neurological disease, or musculoskeletal disorders affecting the hand and wrist will be excluded. All participants will be evaluated in a single session. Demographic data and clinical history will be recorded. Smartphone usage duration will be obtained from built-in device tracking systems (Screen Time for iOS and Digital Wellbeing for Android) based on the last 7 days of use.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Healthy adults
- •Aged between 18 and 35 years
- •Voluntary participation in the study
排除标准
- •History of hand or wrist surgery
- •Fracture or serious injury in the hand/thumb within the last 6 months
- •Neurological disorders
- •Rheumatologic diseases
- •Cognitive impairment preventing understanding of instructions
研究组 & 干预措施
Observational Group: Smartphone-Addicted Participants
Participants classified as having smartphone addiction according to the Smartphone Addiction Scale-Short Form will undergo a single-session assessment including daily smartphone screen time, dominant hand grip strength, thumb pinch strength, wrist joint position sense, and thumb joint position sense.
干预措施: Assessment Protocol (Other)
Observational Group: Non-Addicted Participants
Participants classified as not having smartphone addiction according to the Smartphone Addiction Scale-Short Form will undergo the same single-session assessment including daily smartphone screen time, dominant hand grip strength, thumb pinch strength, wrist joint position sense, and thumb joint position sense.
干预措施: Assessment Protocol (Other)
结局指标
主要结局
Hand Grip Strength
时间窗: Single assessment at baseline
Hand grip strength will be measured using a hydraulic hand dynamometer. The participant will be in a seated position with the elbow flexed at 90 degrees. Three measurements will be taken with a 10-second rest between each, and the average value will be recorded in kilograms (kg).
Thumb Pinch Strength
时间窗: Single assessment at baseline
Thumb muscle strength will be measured using a pinchmeter. The participant will be seated with the elbow flexed at 90 degrees and the wrist in a neutral position. The average of three trials will be recorded in kilograms (kg).
Thumb Active Joint Position Sense (JPS)
时间窗: Single assessment at baseline
Measured using a standard transparent plastic goniometer. The researcher will passively move the thumb to a 30-degree abduction target position. The participant will be asked to actively reproduce this angle. The absolute error between the target angle and the reproduced angle will be recorded in degrees.
Wrist Joint Position Sense (JPS)
时间窗: Single assessment at baseline
Measured using a goniometer with the participant's eyes closed. The wrist will be passively moved to predetermined positions (30 degrees flexion, 30 degrees extension, 10 degrees radial deviation, and 15 degrees ulnar deviation). The participant will then actively reposition the wrist, and the absolute error will be calculated in degrees.
次要结局
- Smartphone Screen Time(Single assessment at baseline)
- Smartphone Addiction Scale-Short Form(Single assessment at baseline)
研究者
ESRA PEHLIVAN
Principal İnvestigator
Saglik Bilimleri Universitesi