Smart Phone AddictionNCT06849687
Effect of Whole Body Vibration in Young Females With Smartphone Addiction
A study testing Whole body vibration and Strengthening exercises in people with Smart Phone Addiction, run by Cairo University at 1 site in Egypt.
Trial summary
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. Read more about this study
- Who is it for?
- Ages 18 to 25 years, women only
- Conditions the study is for
- Smart Phone Addiction
- What is being tested?
- Whole body vibration and Strengthening exercises
- Type of treatment
- Medical device
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 66 participants
- Where
- 1 siteEgypt
- Study dates
- 22 May 2025to 30 Nov 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 25 years
- Women only
- No healthy volunteers
- Adult
Who may be able to join
- 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.
Who cannot join
- 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)
Trial locations and contacts
1 site in 1 country.
About this study
Official 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.
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.
- Conditions
- Smart Phone Addiction
- Being tested
- Whole body vibration, Sham Whole body vibration, Strengthening exercises
- Keywords
- whole body vibration, hand grip strength, muscle activity, upper limb function, smart phone addiction
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Whole body vibrationDevice
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 vibrationDevice
Participants will receive the vibration with the device turned off.
Strengthening exercisesOther
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.
| Study group | Role | What they receive |
|---|---|---|
| Group A (Whole body vibration group) | Experimental | Whole body vibration (WBV) group will receive vibration on the platform for 20 repetitions in 2 sets with 2 minutes rest between sets in addition to strengthening exercises to the hand muscles. Receives: Device: Whole body vibration; Other: Strengthening exercises |
| Group B (Sham Whole body vibration group) | Sham comparator | participants will receive WBV with the device turned off in addition to strengthening exercises to the hand muscles. Receives: Device: Sham Whole body vibration; Other: Strengthening exercises |
What is being measured
The primary outcome is the main question the study is designed to answer.
Hand grip strength
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.
Measured: 4 weeks
Secondary outcomes (5)
pinch strength
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.
Measured: 4 weeks
Muscle activity of flexor carpi radialis muscle
Muscle activity will be measured utilizing electromyography (EMG) using the Delsys Trigno (DST01) system for flexor carpi radialis muscle.
Measured: 4 weeks
Muscle activity for flexor carpi ulnaris muscle
Muscle activity will be measured utilizing electromyography (EMG) using the Delsys Trigno (DST01) system for flexor carpi ulnaris muscle.
Measured: 4 weeks
Muscle activity for extensor digitorum communis muscle
Muscle activity will be measured utilizing electromyography (EMG) using the Delsys Trigno (DST01) system for extensor digitorum communis muscle.
Measured: 4 weeks
Upper limb function
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.
Measured: 4 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Feb 2025
- Study start22 May 2025
- Primary completion30 Oct 2025
- Study completion30 Nov 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Smart Phone AddictionStudies of the same condition, open and under way.
- More trials run by Cairo UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Care provider
- Enrolment
- 66 participants (actual)
Sponsor and investigators
- Lead sponsor
- Cairo University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Nesma Morgan Allam, Cairo University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06849687
- Sponsor's protocol ID
- No. 7486
- Status last verified
- May 2025
- First submitted
- 24 Feb 2025
- Last updated
- 16 Dec 2025
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes
Publications
Allam NM, Alkhaldi RA, Alshammari WZ, Salama MEM, Abed SY, Ibraheem KM, Ebrahim HA, El-Sherbiny M, Salem HE, Abdelrahman MMA, Eladl HM. Acute 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. Front Med (Lausanne). 2026 Apr 20;13:1800879. doi: 10.3389/fmed.2026.1800879. eCollection 2026.
PubMed 42089064
Study at a glance
From the registry record, last updated by the sponsor on 16 Dec 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official 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.
- ClinicalTrials.gov ID
- NCT06849687
- Acronym / sponsor ID
- No. 7486
- Conditions
- Smart Phone Addiction
- Keywords
- whole body vibration, hand grip strength, muscle activity, upper limb function, smart phone addiction
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 66 participants (actual)
- Lead sponsor
- Cairo UniversityUniversity, hospital or other
- Study start
- 22 May 2025 (actual)
- Primary completion
- 30 Oct 2025 (actual)
- Study completion
- 30 Nov 2025 (actual)
- First posted
- 27 Feb 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, care provider)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Group A (Whole body vibration group) | Experimental | Device: Whole body vibration, Other: Strengthening exercisesWhole body vibration (WBV) group will receive vibration on the platform for 20 repetitions in 2 sets with 2 minutes rest between sets in addition to strengthening exercises to the hand muscles. |
| Group B (Sham Whole body vibration group) | Sham comparator | Device: Sham Whole body vibration, Other: Strengthening exercisesparticipants will receive WBV with the device turned off in addition to strengthening exercises to the hand muscles. |
Who may qualify
- Ages
- 18 to 25 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (3 listed)
- 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.
Key exclusion criteria (4 listed)
- 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)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Whole body vibrationParticipants 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. | Device | Group A (Whole body vibration group) |
| Sham Whole body vibrationParticipants will receive the vibration with the device turned off. | Device | Group B (Sham Whole body vibration group) |
| Strengthening exercisesParticipants 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. | Other | Group A (Whole body vibration group), Group B (Sham Whole body vibration group) |
Primary outcome
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.
5 secondary outcomes
pinch strength
Time frame: 4 weeks
Muscle activity of flexor carpi radialis muscle
Time frame: 4 weeks
Muscle activity for flexor carpi ulnaris muscle
Time frame: 4 weeks
Muscle activity for extensor digitorum communis muscle
Time frame: 4 weeks
Upper limb function
Time frame: 4 weeks
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Dec 2025.
- Derived from this study: PubMed 42089064Allam NM, Alkhaldi RA, Alshammari WZ, Salama MEM, Abed SY, Ibraheem KM, Ebrahim HA, El-Sherbiny M, Salem HE, Abdelrahman MMA, Eladl HM. Acute 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. Front Med (Lausanne). 2026 Apr 20;13:1800879. doi: 10.3389/fmed.2026.1800879. eCollection 2026.
- Individual participant dataSharing planned: Yes
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Whole body vibration and Strengthening exercises in people with Smart Phone Addiction, run by Cairo University at 1 site in Egypt.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 16 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Hand grip strength (time frame: 4 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT06849687, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Dec 2025.