The Influence of Neck Stiffness on Head Kinematics and Maximum Principal Strain Associated With Youth American Football Collisions

A recent article from the Journal of Applied Biomechanics and on Neck injuries which is a current hot topic.

Authors:

Janie Cournoyer
David Koncan
Michael D. Gilchrist
T. Blaine Hoshizaki

University of Ottawa;
University College Dublin

Published: 08 Mar 2021

The purpose of this study was to investigate the differences in head kinematics and maximum principal strain in youth American football helmet-to-helmet collisions between an unbiased neckform and prototype neck apparatus, including springs, representing the upper trapezius, the splenius capitis, and the sternocleidomastoid muscles, for 3 impact velocities, 3 impact locations, and 2 striking masses. This research was part of a larger project funded by the National Operating Committee on Sport Safety Equipment to inform youth helmet testing procedures.

Understanding the relationship between head mass and neck stiffness during direct head impacts is especially concerning in youth sports where athletes have higher proportional head mass to neck strength.

For full study results and conclusions click on the link

The Influence of Neck Stiffness on Head Kinematics and Maximum Principal Strain Associated With Youth American Football Collisions

 

Looking after your mental health and well being

Publication from UK Coaching:

As a coach, your performance may, or will be, critical to success in your role. How you feel and what you think ultimately effects your behaviour in this performance role. Your mental health
has a ‘two-way street’ relationship with how you feel and what you think. Therefore, it is of great significance to consider – to care for yourself and your mental health and well-being.
The World Health Organization states that mental health is where an individual realises their potential, can cope with everyday stress, can work productively, and contribute to their
community. Mental health and well-being is associated with positive physical health, pro-social behaviour and the ability to self-regulate and cope with adversity. Key aspects to positive
mental health are as follows: you feel good on a regular basis; you can reflect positively on your life, your abilities and achievements; you can be self-compassionate to yourself; and finally, you feel and believe there is a sense of meaning in your life.

Click on PDF to continue reading :  Looking after your mental health and well being

 

Exposure to impacts across a competitive rugby season impairs balance and neuromuscular function in female rugby athletes

An Original research paper that went under the radar, another science paper coming out of Canada.

Authors

Stephanie E Black

Bruno Follmer

Rinaldo André Mezzarane

Gregory E P Pearcey

Yao Sun

Dr. E Paul Zehr

  1. Rehabilitation Neuroscience Laboratory, University of Victoria, Victoria, BC, Canada
  2. School of Exercise Science, Physical and Health Education, University of Victoria, Victoria, BC, Canada
  3. Human Discovery Science, International Collaboration on Repair Discoveries (ICORD), Vancouver, BC, Canada
  4. Laboratory of Signal Processing and Motor Control, Faculty of Physical Education, University of Brasilia, Brasilia, DF, Brazil
  5. Centre for Biomedical Research, University of Victoria, Victoria, BC, Canada
  6. Division of Medical Sciences, University of Victoria, Victoria, BC, Canada

The study did an objective assessment tools to detect subtle neurological deficits that accompany repetitive and mild head impacts in contact sport across a
season.

What are the new findings in the study:

► A competitive rugby season induces subtle deteriorations in neuromuscular function that is not captured in traditional sideline assessment.

► Differentiation between static stances which range

in difficulty is relevant to uncover subtle changes in

balance.

► Tandem-leg and double-leg static stances are sensitive to detect centre of pressure alteration following

a season of recurrent head impacts.

► Spinal cord excitability measurements suggest deviated values at baseline

 

The study also found impact in clinical practices in Future studies.

► Implementing an objective balance measure as a clinical assessment may uncover subtle neurological. impairments without diagnosed concussion.

► Double-leg stance is often overlooked by subjective assessments, but it provides an insightful outcome if performed using a sensitive tool.

► The challenging tandem-leg stance over a foam pad notably contributes to a clinical assessment after recurrent mild head impacts.

► Spinal cord excitability may be suitable for detecting particular neurological patterns in female athletes exposed to head impacts performed using a sensitive tool.

Study Conclusions:

The study concluded that quantitative measures revealed that exposure to impacts across a competitive rugby season impair balance in two specific stances in female rugby athletes. Tandem-leg stance on an unstable surface and double-leg stance on firm surface are useful assessment conditions when performed over a low-cost balance board, even without clinically diagnosed concussion.

Click on link for full study: Exposure to impacts across a competitive rugby season impairs balance and neuromuscular function in female rugby athletes

Cumulative Sport‑Related Injuries and Longer Term Impact in Retired Male Elite‑ and Amateur‑Level Rugby Code Athletes and Non‑contact Athletes: A Retrospective Study

Interesting study by Durham University on the impact of the accumulation of injuries on both professional and amateur rugby players, important role on the Concussion.
Rugby union and rugby league are popular team contact sports, but they bring a high risk of injury. Although previous studies have reported injury occurrence across one or several seasons, none have explored the total number of injuries sustained across an entire career.
Reading the paper efforts should be prioritized to reduce the occurrence and recurrence of injuries in rugby codes at all levels of the sport.
Strategies should be developed for supporting specific physical health needs of both codes athlete’s post-retirement.
To read the full Article click on the PDF : Durham Study

A Novel Method to Determine Optimal Load in Elastic-Based Power Training

Published in September edition of Journal Strength Conditioning and Research 32(9): 2401-2408

The authors used a bicep curl with 6 different elastic (resistance) tubes & measured force data from a strain gauge and velocity data from a 3D motion capture system to calculate power output.

An analysis based on individual’s cable arm curl 1-repetition maximum (1RM) was then used to generate general guidelines for the most appropriate tube to use for arm curl power training based on upper arm 1RM.

The practical application of this research is that it will allow practitioners to identify the optimal resistance tube or band that will maximize power based on their clients’ 1RM.

More significantly, however, researchers and manufacturers can apply the novel technique in the study to determine the optimal tube or band for power training across multiple exercises, population groups, and brands of tubing and bands.

Article