Preliminary study to examine the influence of new school bag on posture of elementary school children

Preliminary study to examine the influence of new school bag on posture of elementary school children - A study to examine the influence on posture of a new school bag

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000040265

Enrollment

Registered

2020-04-28

Start date

2020-04-30

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Scoliosis

Interventions

Measure and evaluate muscular strength (grip strength, back strength, abdominal strength) and posture, and use a new or normal school bag to measure muscle strength and posture again after 1 month, 3

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Healthy children who can agree to Hashimoto's school bag design

Exclusion criteria

Exclusion criteria: Parents or children who do not agree with the purpose of this study Those with spinal disorders

Design outcomes

Primary

Measure	Time frame
Strength evaluation: abdominal muscles, back muscles, grip strength Posture evaluation: Image evaluation of both auricles, cervical spine curvature, back curvature, lumbar curvature (side image) Objective evaluation of posture (evaluated with a maximum of 5 points) StreThe nape is stretched and the chin is closedtched s Be proud Both shoulders pulled behind Strength in the lower abdomen (Umbuntanda) pine Relaxing with no tension in the muscles of the whole body Be well balanced and stable Passing through the knee joint and falling just in front of the ankle of the foot (no front-back inclination) The spine has a gentle S-shaped curve Left and right spinal column not evenly curved The abdominal and back muscles that support Evaluate 11 items on a scale of 5 the spine are strong	—

Measure

Time frame

Strength evaluation: abdominal muscles, back muscles, grip strength Posture evaluation: Image evaluation of both auricles, cervical spine curvature, back curvature, lumbar curvature (side image) Objective evaluation of posture (evaluated with a maximum of 5 points) StreThe nape is stretched and the chin is closedtched s Be proud Both shoulders pulled behind Strength in the lower abdomen (Umbuntanda) pine Relaxing with no tension in the muscles of the whole body Be well balanced and stable Passing through the knee joint and falling just in front of the ankle of the foot (no front-back inclination) The spine has a gentle S-shaped curve Left and right spinal column not evenly curved The abdominal and back muscles that support Evaluate 11 items on a scale of 5 the spine are strong

—

Countries

Japan

Contacts

Public ContactShoji Seki

Academic Research Department Orthopedics / Motorology

seki@med.u-toyama.ac.jp076-434-7353

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026