Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Cranial Bones: Superior and Posterior View

Cranial Bones: Superior and Posterior View

The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...

PPE Use in Healthcare Settings I: Donning

PPE Use in Healthcare Settings I: Donning

Donning PPE must be completed before contact with the patient. This process protects from infectious agents. The sequence and action included in each donning are critical, and the steps must be systematic to avoid exposure to pathogens. The institutional policy also needs to be followed while donning PPE. The pre-donning preparations are gathering equipment, inspecting the PPE equipment for tears, holes, or damage, removing jewelry, removing any garments below the elbows, and tying the hair...

Sutures of the Skull

Sutures of the Skull

The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...

Bending of Members Made of Several Materials

Bending of Members Made of Several Materials

In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Striking Concerns: Reduced Protection in Older Kendo Helmets.

Cureus·2026

Same author

Cumulative electrocardiogram abnormalities predict left ventricular ejection fraction reduction: EchoNext database analysis.

Journal of electrocardiology·2026

Same author

A Case of Wilson's Disease With Early Neuropsychiatric and Late Hepatic Manifestations.

Cureus·2025

Same author

Twists and Turns: A Chiropractic Roller Coaster Experience Unraveling the Intricacies of Bilateral Vertebral Artery Dissection.

Cureus·2024

Same author

Ceftriaxone Resistance in Campylobacter Gastroenteritis.

Cureus·2024

Same author

Different COVID-19 treatments' impact on hospital length of stay.

European journal of medical research·2023

Same journal

Immunohistochemistry (IHC) Versus Genomic Profiling in Cancer: Roles in Precision Medicine.

Cureus·2026

Same journal

Pediatric Nasal Tip Reconstruction After a Donkey Bite Using an Expanded Paramedian Forehead Flap With Conchal Cartilage Grafts: A Case Report.

Cureus·2026

Same journal

Splenic Rupture: A Delayed and Rare Complication of Colonoscopy.

Cureus·2026

Same journal

Super-refractory Status Epilepticus in Febrile Infection-Related Epilepsy Syndrome Triggered by Influenza A: A Pediatric Case Report.

Cureus·2026

Same journal

Comparative Evaluation of Serum Peroxiredoxin 2 (PRDX2), Serum Peroxiredoxin 4 (PRDX4), and Plasma Methylated Septin 9 (mSEPT9) Levels Against Conventional Biomarkers for Early Detection of Colorectal Cancer: A Study Protocol.

Cureus·2026

Same journal

Inspiratory Muscle Training for Patients With Chronic Obstructive Pulmonary Disease: A Narrative Review.

Cureus·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 21, 2025

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

Published on: September 21, 2017

Striking Differences in Kendo Headgear.

An Phuc D Ta¹, Megan D Hsu¹, Harrison Chu¹

¹College of Medicine, California Northstate University, Elk Grove, USA.

|July 8, 2024

Summary

This summary is machine-generated.

Wider stitching and polyurethane padding in kendo helmets significantly reduce impact forces, enhancing protection against sports-related concussions (SRC). Wider patterns and better padding offer improved safety for kendo practitioners.

Keywords:

concussion prevention helmet design helmets kendo protective gear safety standards

More Related Videos

Modified Drop Tower Impact Tests for American Football Helmets

Modified Drop Tower Impact Tests for American Football Helmets

Published on: February 19, 2017

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

Published on: April 18, 2019

Related Experiment Videos

Last Updated: Jun 21, 2025

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact

Published on: September 21, 2017

Modified Drop Tower Impact Tests for American Football Helmets

Modified Drop Tower Impact Tests for American Football Helmets

Published on: February 19, 2017

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data

Published on: April 18, 2019

Area of Science:

Sports Medicine
Biomechanics
Martial Arts Safety

Background:

Kendo helmets, based on traditional samurai armor, lack modern third-party safety testing.
Existing kendo helmet designs have not evolved to address head trauma mitigation effectively.

Purpose of the Study:

To evaluate how different kendo helmet stitching patterns and padding materials affect impact force absorption.
To assess the impact of gender and kendo rank (Dan/Kyu) on these safety metrics.
To determine optimal helmet designs for preventing sports-related concussions (SRC) in kendo.

Main Methods:

Utilized a sensor-equipped mannequin to analyze over 4,000 simulated kendo strikes.
Tested various helmet stitching widths (2-9 mm) and padding types (polyurethane, cotton).
Collected data from 10 kendo practitioners (6 male, 4 female) to assess impact variations.

Main Results:

Helmets with wider stitching (8-9 mm) demonstrated significantly better energy absorption, reducing mean g-forces (p < 0.001).
Polyurethane padding provided a statistically significant reduction in impact force compared to cotton padding (p < 0.001).
Male and higher-ranked (Dan) practitioners delivered significantly stronger impacts (p < 0.001).

Conclusions:

Kendo helmet stitching width and padding material critically influence concussion protection.
Wider stitching patterns and polyurethane padding offer superior safety benefits.
Further research is needed to understand how striking force differences between genders and ranks impact kendo match outcomes.