NIPH Clinical Trials Search

Effect of chewing on stiff shoulders associated with prolonged smartphone use

Basic Information

Recruitment status	Pending
Health condition(s) or Problem(s) studied	Healthy adult
Date of first enrollment	2026/06/22
Target sample size	25
Countries of recruitment	Japan
Study type	Interventional
Intervention(s)	Test food(Mid-dose) Test food(Low-dose) No intake

Outcome(s)

Primary Outcome	EMG measurement (Median Frequency)
Secondary Outcome	Muscle stiffness measurement Subjective symptoms (VAS)

Key inclusion & exclusion criteria

Age minimum	20years-old
Age maximum	60years-old
Gender	Male and Female
Include 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
Exclude 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