Clark, J M; Hoshizaki, T B
The Ability of Men's Lacrosse Helmets to Reduce the Dynamic Impact Response for Different Striking Techniques in Women's Field Lacrosse Journal Article
In: American Journal of Sports Medicine, vol. 44, no. 4, pp. 1047–1055, 2016.
Abstract | BibTeX | Tags: *Brain Injuries/pc [Prevention & Control], *Head Protective Devices, *Materials Testing, *Racquet Sports/in [Injuries], *Sports Equipment, adult, Female, Humans, Male
@article{Clark2016,
title = {The Ability of Men's Lacrosse Helmets to Reduce the Dynamic Impact Response for Different Striking Techniques in Women's Field Lacrosse},
author = {Clark, J M and Hoshizaki, T B},
year = {2016},
date = {2016-01-01},
journal = {American Journal of Sports Medicine},
volume = {44},
number = {4},
pages = {1047--1055},
abstract = {BACKGROUND: Women's field lacrosse is described as a noncontact game relying primarily on rules to decrease the risk of head injuries. Despite not allowing head contact, however, concussions continue to be reported in women's field lacrosse. PURPOSE: To assess the ability of men's lacrosse helmets to decrease linear and angular acceleration for different striking techniques in women's field lacrosse. STUDY DESIGN: Controlled laboratory study. METHODS: A helmeted and unhelmeted Hybrid III 50th Percentile headform was attached to a Hybrid III neckform and were subjected to impacts by 8 striking techniques. Eleven athletic females completed 5 slashing techniques, while physical reconstruction equipment was used to simulate falls and shoulder and ball impacts to the head. Three trials were conducted for each condition, and peak resultant linear and angular accelerations of the headform were measured. RESULTS: Falls produced the highest linear and angular acceleration, followed by ball and high-velocity stick impacts. Low-velocity stick impacts were found to produce the lowest linear and angular accelerations. Men's lacrosse helmets significantly decreased linear and angular accelerations in all conditions, while unhelmeted impacts were associated with high accelerations. CONCLUSION: If women's field lacrosse is played within the rules, only falls were found to produce high linear and angular acceleration. However, ball and high-velocity stick impacts were found to produce high linear and angular accelerations. These linear and angular accelerations were found to be within the ranges reported for concussion. When the game is not played within the rules, men's lacrosse helmets provide an effective method of reducing linear and angular accelerations. Thus, women's field lacrosse may be able to reduce the occurrence of high linear and angular acceleration impacts by having governing bodies improving rules, implementing the use of helmets, or both. CLINICAL RELEVANCE: Identifying striking techniques that produce high linear and angular acceleration specific to women's lacrosse and measuring the capacity of a men's lacrosse helmet to reduce linear and angular acceleration.Copyright © 2016 The Author(s).},
keywords = {*Brain Injuries/pc [Prevention \& Control], *Head Protective Devices, *Materials Testing, *Racquet Sports/in [Injuries], *Sports Equipment, adult, Female, Humans, Male},
pubstate = {published},
tppubtype = {article}
}
Jadischke, R; Viano, D C; Dau, N; King, A I; McCarthy, J
On the accuracy of the Head Impact Telemetry (HIT) System used in football helmets Journal Article
In: Journal of Biomechanics, vol. 46, no. 13, pp. 2310–2315, 2013.
Abstract | BibTeX | Tags: *Head Protective Devices/st [Standards], *Materials Testing, *Sports Equipment/st [Standards], *Telemetry/is [Instrumentation], Adolescent, adult, Equipment Design, football, Humans, Male, Pressure, Young Adult
@article{Jadischke2013,
title = {On the accuracy of the Head Impact Telemetry (HIT) System used in football helmets},
author = {Jadischke, R and Viano, D C and Dau, N and King, A I and McCarthy, J},
year = {2013},
date = {2013-01-01},
journal = {Journal of Biomechanics},
volume = {46},
number = {13},
pages = {2310--2315},
abstract = {On-field measurement of head impacts has relied on the Head Impact Telemetry (HIT) System, which uses helmet mounted accelerometers to determine linear and angular head accelerations. HIT is used in youth and collegiate football to assess the frequency and severity of helmet impacts. This paper evaluates the accuracy of HIT for individual head impacts. Most HIT validations used a medium helmet on a Hybrid III head. However, the appropriate helmet is large based on the Hybrid III head circumference (58 cm) and manufacturer's fitting instructions. An instrumented skull cap was used to measure the pressure between the head of football players (n=63) and their helmet. The average pressure with a large helmet on the Hybrid III was comparable to the average pressure from helmets used by players. A medium helmet on the Hybrid III produced average pressures greater than the 99th percentile volunteer pressure level. Linear impactor tests were conducted using a large and medium helmet on the Hybrid III. Testing was conducted by two independent laboratories. HIT data were compared to data from the Hybrid III equipped with a 3-2-2-2 accelerometer array. The absolute and root mean square error (RMSE) for HIT were computed for each impact (n=90). Fifty-five percent (n=49) had an absolute error greater than 15% while the RMSE was 59.1% for peak linear acceleration. Copyright © 2013 Elsevier Ltd. All rights reserved.},
keywords = {*Head Protective Devices/st [Standards], *Materials Testing, *Sports Equipment/st [Standards], *Telemetry/is [Instrumentation], Adolescent, adult, Equipment Design, football, Humans, Male, Pressure, Young Adult},
pubstate = {published},
tppubtype = {article}
}
Clark, J M; Hoshizaki, T B
The Ability of Men's Lacrosse Helmets to Reduce the Dynamic Impact Response for Different Striking Techniques in Women's Field Lacrosse Journal Article
In: American Journal of Sports Medicine, vol. 44, no. 4, pp. 1047–1055, 2016.
@article{Clark2016,
title = {The Ability of Men's Lacrosse Helmets to Reduce the Dynamic Impact Response for Different Striking Techniques in Women's Field Lacrosse},
author = {Clark, J M and Hoshizaki, T B},
year = {2016},
date = {2016-01-01},
journal = {American Journal of Sports Medicine},
volume = {44},
number = {4},
pages = {1047--1055},
abstract = {BACKGROUND: Women's field lacrosse is described as a noncontact game relying primarily on rules to decrease the risk of head injuries. Despite not allowing head contact, however, concussions continue to be reported in women's field lacrosse. PURPOSE: To assess the ability of men's lacrosse helmets to decrease linear and angular acceleration for different striking techniques in women's field lacrosse. STUDY DESIGN: Controlled laboratory study. METHODS: A helmeted and unhelmeted Hybrid III 50th Percentile headform was attached to a Hybrid III neckform and were subjected to impacts by 8 striking techniques. Eleven athletic females completed 5 slashing techniques, while physical reconstruction equipment was used to simulate falls and shoulder and ball impacts to the head. Three trials were conducted for each condition, and peak resultant linear and angular accelerations of the headform were measured. RESULTS: Falls produced the highest linear and angular acceleration, followed by ball and high-velocity stick impacts. Low-velocity stick impacts were found to produce the lowest linear and angular accelerations. Men's lacrosse helmets significantly decreased linear and angular accelerations in all conditions, while unhelmeted impacts were associated with high accelerations. CONCLUSION: If women's field lacrosse is played within the rules, only falls were found to produce high linear and angular acceleration. However, ball and high-velocity stick impacts were found to produce high linear and angular accelerations. These linear and angular accelerations were found to be within the ranges reported for concussion. When the game is not played within the rules, men's lacrosse helmets provide an effective method of reducing linear and angular accelerations. Thus, women's field lacrosse may be able to reduce the occurrence of high linear and angular acceleration impacts by having governing bodies improving rules, implementing the use of helmets, or both. CLINICAL RELEVANCE: Identifying striking techniques that produce high linear and angular acceleration specific to women's lacrosse and measuring the capacity of a men's lacrosse helmet to reduce linear and angular acceleration.Copyright © 2016 The Author(s).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Jadischke, R; Viano, D C; Dau, N; King, A I; McCarthy, J
On the accuracy of the Head Impact Telemetry (HIT) System used in football helmets Journal Article
In: Journal of Biomechanics, vol. 46, no. 13, pp. 2310–2315, 2013.
@article{Jadischke2013,
title = {On the accuracy of the Head Impact Telemetry (HIT) System used in football helmets},
author = {Jadischke, R and Viano, D C and Dau, N and King, A I and McCarthy, J},
year = {2013},
date = {2013-01-01},
journal = {Journal of Biomechanics},
volume = {46},
number = {13},
pages = {2310--2315},
abstract = {On-field measurement of head impacts has relied on the Head Impact Telemetry (HIT) System, which uses helmet mounted accelerometers to determine linear and angular head accelerations. HIT is used in youth and collegiate football to assess the frequency and severity of helmet impacts. This paper evaluates the accuracy of HIT for individual head impacts. Most HIT validations used a medium helmet on a Hybrid III head. However, the appropriate helmet is large based on the Hybrid III head circumference (58 cm) and manufacturer's fitting instructions. An instrumented skull cap was used to measure the pressure between the head of football players (n=63) and their helmet. The average pressure with a large helmet on the Hybrid III was comparable to the average pressure from helmets used by players. A medium helmet on the Hybrid III produced average pressures greater than the 99th percentile volunteer pressure level. Linear impactor tests were conducted using a large and medium helmet on the Hybrid III. Testing was conducted by two independent laboratories. HIT data were compared to data from the Hybrid III equipped with a 3-2-2-2 accelerometer array. The absolute and root mean square error (RMSE) for HIT were computed for each impact (n=90). Fifty-five percent (n=49) had an absolute error greater than 15% while the RMSE was 59.1% for peak linear acceleration. Copyright © 2013 Elsevier Ltd. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Clark, J M; Hoshizaki, T B
The Ability of Men's Lacrosse Helmets to Reduce the Dynamic Impact Response for Different Striking Techniques in Women's Field Lacrosse Journal Article
In: American Journal of Sports Medicine, vol. 44, no. 4, pp. 1047–1055, 2016.
Abstract | BibTeX | Tags: *Brain Injuries/pc [Prevention & Control], *Head Protective Devices, *Materials Testing, *Racquet Sports/in [Injuries], *Sports Equipment, adult, Female, Humans, Male
@article{Clark2016,
title = {The Ability of Men's Lacrosse Helmets to Reduce the Dynamic Impact Response for Different Striking Techniques in Women's Field Lacrosse},
author = {Clark, J M and Hoshizaki, T B},
year = {2016},
date = {2016-01-01},
journal = {American Journal of Sports Medicine},
volume = {44},
number = {4},
pages = {1047--1055},
abstract = {BACKGROUND: Women's field lacrosse is described as a noncontact game relying primarily on rules to decrease the risk of head injuries. Despite not allowing head contact, however, concussions continue to be reported in women's field lacrosse. PURPOSE: To assess the ability of men's lacrosse helmets to decrease linear and angular acceleration for different striking techniques in women's field lacrosse. STUDY DESIGN: Controlled laboratory study. METHODS: A helmeted and unhelmeted Hybrid III 50th Percentile headform was attached to a Hybrid III neckform and were subjected to impacts by 8 striking techniques. Eleven athletic females completed 5 slashing techniques, while physical reconstruction equipment was used to simulate falls and shoulder and ball impacts to the head. Three trials were conducted for each condition, and peak resultant linear and angular accelerations of the headform were measured. RESULTS: Falls produced the highest linear and angular acceleration, followed by ball and high-velocity stick impacts. Low-velocity stick impacts were found to produce the lowest linear and angular accelerations. Men's lacrosse helmets significantly decreased linear and angular accelerations in all conditions, while unhelmeted impacts were associated with high accelerations. CONCLUSION: If women's field lacrosse is played within the rules, only falls were found to produce high linear and angular acceleration. However, ball and high-velocity stick impacts were found to produce high linear and angular accelerations. These linear and angular accelerations were found to be within the ranges reported for concussion. When the game is not played within the rules, men's lacrosse helmets provide an effective method of reducing linear and angular accelerations. Thus, women's field lacrosse may be able to reduce the occurrence of high linear and angular acceleration impacts by having governing bodies improving rules, implementing the use of helmets, or both. CLINICAL RELEVANCE: Identifying striking techniques that produce high linear and angular acceleration specific to women's lacrosse and measuring the capacity of a men's lacrosse helmet to reduce linear and angular acceleration.Copyright © 2016 The Author(s).},
keywords = {*Brain Injuries/pc [Prevention \& Control], *Head Protective Devices, *Materials Testing, *Racquet Sports/in [Injuries], *Sports Equipment, adult, Female, Humans, Male},
pubstate = {published},
tppubtype = {article}
}
Jadischke, R; Viano, D C; Dau, N; King, A I; McCarthy, J
On the accuracy of the Head Impact Telemetry (HIT) System used in football helmets Journal Article
In: Journal of Biomechanics, vol. 46, no. 13, pp. 2310–2315, 2013.
Abstract | BibTeX | Tags: *Head Protective Devices/st [Standards], *Materials Testing, *Sports Equipment/st [Standards], *Telemetry/is [Instrumentation], Adolescent, adult, Equipment Design, football, Humans, Male, Pressure, Young Adult
@article{Jadischke2013,
title = {On the accuracy of the Head Impact Telemetry (HIT) System used in football helmets},
author = {Jadischke, R and Viano, D C and Dau, N and King, A I and McCarthy, J},
year = {2013},
date = {2013-01-01},
journal = {Journal of Biomechanics},
volume = {46},
number = {13},
pages = {2310--2315},
abstract = {On-field measurement of head impacts has relied on the Head Impact Telemetry (HIT) System, which uses helmet mounted accelerometers to determine linear and angular head accelerations. HIT is used in youth and collegiate football to assess the frequency and severity of helmet impacts. This paper evaluates the accuracy of HIT for individual head impacts. Most HIT validations used a medium helmet on a Hybrid III head. However, the appropriate helmet is large based on the Hybrid III head circumference (58 cm) and manufacturer's fitting instructions. An instrumented skull cap was used to measure the pressure between the head of football players (n=63) and their helmet. The average pressure with a large helmet on the Hybrid III was comparable to the average pressure from helmets used by players. A medium helmet on the Hybrid III produced average pressures greater than the 99th percentile volunteer pressure level. Linear impactor tests were conducted using a large and medium helmet on the Hybrid III. Testing was conducted by two independent laboratories. HIT data were compared to data from the Hybrid III equipped with a 3-2-2-2 accelerometer array. The absolute and root mean square error (RMSE) for HIT were computed for each impact (n=90). Fifty-five percent (n=49) had an absolute error greater than 15% while the RMSE was 59.1% for peak linear acceleration. Copyright © 2013 Elsevier Ltd. All rights reserved.},
keywords = {*Head Protective Devices/st [Standards], *Materials Testing, *Sports Equipment/st [Standards], *Telemetry/is [Instrumentation], Adolescent, adult, Equipment Design, football, Humans, Male, Pressure, Young Adult},
pubstate = {published},
tppubtype = {article}
}