Skip to content

Effect of chewing on stiff shoulders associated with prolonged smartphone use

Effect of chewing on stiff shoulders associated with prolonged smartphone use - Effect of chewing on stiff shoulders associated with prolonged smartphone use

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000061884
Enrollment
25
Registered
2026-06-19
Start date
2026-06-22
Completion date
Unknown
Last updated
2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy adult

Interventions

Test food(Mid-dose) Test food(Low-dose) No intake

Sponsors

Lotte Co., Ltd.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: (1) Those who can eat the test foods ( preference) (2) Those who have received sufficient explanation of the purpose and content of the study, have the ability to consent, have voluntarily volunteered to participate with a good understanding, and have agreed to participate in this study in writing

Exclusion criteria

Exclusion criteria: (1) Those who have any symptoms that may affect test food intake (2) Those currently undergoing dental treatment, including orthodontic treatment (except for periodic cleanings). (3) Those who may develop allergies related to the study (4) Those who are judged by the study representative to be inappropriate to participate in this study (5) Those taking medications that are thought to have the potential to affect the results (6) Those who are pregnant or lactating (7) Those who mainly use their left hand to operate their smartphone (8) Those who are otherwise deemed unsuitable as subjects by the test administrator

Design outcomes

Primary

MeasureTime frame
EMG measurement (Median Frequency)

Secondary

MeasureTime frame
Muscle stiffness measurement Subjective symptoms (VAS)

Countries

Japan

Contacts

Public ContactKazuto Okabayashi

Lotte Co., Ltd. Research and Development Center, Kamukoto Research Department

okabayashi_kazuto@lotte.co.jp0488370744

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Sep 19, 2026