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OpenTrials
Completed

NCT Number: NCT06849687

Effect of Whole Body Vibration in Young Females With Smartphone Addiction

Young adults have a high prevalence of smartphone addiction. Many adolescents use their smartphones extensively for communication, which starts out as a habit but eventually turns into an addiction. Numerous studies have shown that adolescents use social media for roughly ten hours every day.

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Key information

Conditions

Smart Phone Addiction

Age range

18 year–25 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Faculty of physical therapy

Giza, Giza Governorate, 1124, Egypt

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • High smartphone users according to the Smartphone Addiction Scale Short Version (SAS- SV)
  • Body mass index (BMI) less than 30 kg/m²
  • Didn't receive regular exercise in the last 6 months.

Exclusion criteria

  • Medical history of median nerve release, hand or thumb tendon lesion
  • Prior hand or wrist fractures
  • Medical history of hand injuries, and upper limb skin diseases
  • WBV contraindications include (joint issues, acute inflammations, back pain, epilepsy, diabetes, or neuromuscular disorders, or dizziness, any discomfort, and nausea)

Treatment and study plan

Whole Body Vibration

Device

Participants will be asked to sit on an chair without armrests close to the platform and will be asked to perform 90° shoulder flexion, bend both elbows slightly, flex the trunk forwards and place both hands on the platform.

Sham Whole Body Vibration

Device

Participants will receive the vibration with the device turned off.

Strengthening Exercises

Other

Participants will use elastic resistance for the finger extension and flexion exercises, and ball to strength wrist flexors for two sets of 10 repetitions within a training session.

Primary outcomes

  1. Hand grip strength

    Time frame: 4 weeks

    Participants will be asked to perform maximum hand grip with the dominant hand with hold for 5 seconds, for three repetitions using the hand held dynamometer (dynamometer, Jamar, United States), a 60 seconds rest interval will be planned in between the repetitions. The mean of the three repetitions will used for calculation of hand grip strength.

Secondary outcomes

  1. pinch strength

    Time frame: 4 weeks

    The participant will be asked to sit comfortably, with the pinch gauge between the index and middle fingers, and thumb, with the tested arm at the side with the elbow flexed 90 degrees. After five seconds of holding the pinch with full force, take a reading, repeat three times.

  2. Muscle activity of flexor carpi radialis muscle

    Time frame: 4 weeks

    Muscle activity will be measured utilizing electromyography (EMG) using the Delsys Trigno (DST01) system for flexor carpi radialis muscle.

  3. Muscle activity for flexor carpi ulnaris muscle

    Time frame: 4 weeks

    Muscle activity will be measured utilizing electromyography (EMG) using the Delsys Trigno (DST01) system for flexor carpi ulnaris muscle.

  4. Muscle activity for extensor digitorum communis muscle

    Time frame: 4 weeks

    Muscle activity will be measured utilizing electromyography (EMG) using the Delsys Trigno (DST01) system for extensor digitorum communis muscle.

  5. Upper limb function

    Time frame: 4 weeks

    The upper limb function will be assessed by using the Arms, Shoulders and Hands Disability Questionnaire (DASH) Quick, which is a validated and widely used 11-item questionnaire that evaluates certain impairments and symptoms in the upper limb. the score ranged from 0 to 100, the lower the score, the greater the results. While, higher scores represent the worst results.

Sponsors and collaborators

Lead sponsor

Cairo University

Other

Registry information

Official study title

Effect of Whole Body Vibration on Hand Grip Strength, Muscular Activity, and Upper Limb Function in Young Females With Smartphone Addiction: A Randomized Controlled Trial.

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Feb 27, 2025
Registry last updated
Dec 16, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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