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Gregory M. Gutierrez, Catherine Conte and Kristian Lightbourne

Head impacts are common in contact sports, but only recently has there been a rising awareness of the effects of subconcussive impacts in adolescent athletes. A better understanding of how to attenuate head impacts is needed and therefore, this study investigated the relationship between neck strength, impact, and neurocognitive function in an acute bout of soccer heading in a sample of female high school varsity soccer players. Seventeen participants completed the ImPACT neurocognitive test and had their isometric neck strength tested (flexion, extension, and bilateral flexion) before heading drills. Each participant was outfitted with custom headgear with timing switches and a three-dimensional accelerometer affixed to the back of the head, which allowed for measurement of impact during heading. Participants performed a series of 15 directional headers, including 5 forward, 5 left and 5 right headers in a random order, then completed the ImPACT test again. Neurocognitive tests revealed no significant changes following heading. However, there were statistically significant, moderate, negative correlations (r = −0.500:−0.757, p < .05) between neck strength and resultant header acceleration, indicating that those with weaker necks sustained greater impacts. This suggests neck strengthening may be an important component of any head injury prevention/reduction program.

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Sherry Robertson and Margo Mountjoy

.L. , Berglund , L. , & Berglund , B. ( 2008 ). Special attention to the weight-control strategies employed by Olympic athletes striving for leanness is required . Clinical Journal of Sport Medicine, 18 , 5 – 9 . PubMed ID: 18185032 doi:10.1097/JSM.0b013e31804c77bd 10.1097/JSM.0b013e31804c77bd Holick

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Carlos Amo, Miguel Ortiz del Castillo, Rafael Barea, Luis de Santiago, Alejandro Martínez-Arribas, Pedro Amo-López and Luciano Boquete

Objective:

Propose a simplified method applicable in routine clinical practice that uses EEG to assess induced gamma-band activity (GBA) in the 30–90 Hz frequency range in cerebral motor areas.

Design:

EEG recordings (25 healthy subjects) of cerebral activity (at rest, motor task). GBA was obtained as power spectral density (PSD). GBA — defined as the gamma index (Iγ) — was calculated using the basal GBA (γB) and motor GBA (γMOV) PSD values.

Results:

The mean values of Iγ were (Iγ R (right hand) = 1.30, Iγ L (left hand) = 1.22). Manual laterality showed a correlation with Iγ.

Conclusions:

Iγ may provide a useful way of indirectly assessing operation of activated motor neuronal circuits. It could be applied to diagnosis of motor area pathologies and as follow up in rehabilitation processes. Likewise, Iγ could enable the assessment of motor capacity, physical training and manual laterality in sport medicine.

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Monna Arvinen-Barrow, Diarmuid Hurley and Montse C. Ruiz

This study documented the lived career-ending injury experiences among elite Irish rugby football union (IRFU) players. Three players took part in semistructured one-on-one interviews. Interpretative phenomenological analysis (Smith, 1996) revealed that the process of psychosocial injury rehabilitation and the subsequent transition process was for the most part a distressing one and evolved in a cyclical, yet stage-like (Heil, 1994), manner. The nature of the postinjury career transition appeared to be dependent on the interactional balance of participants’ psychosocial responses to injury, existing coping mechanisms, and other factors related to the injury and career transition process. Appropriate social support network, use of sport medicine and counseling professionals, as well as organizational officials are needed to best prepare elite rugby players for life outside of sport, and to ensure a healthy career transition (Taylor & Ogilvie, 1994) out of sport.

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Franco M. Impellizzeri

, disinformation, and manipulation to the masses. Sport science and sport medicine are not alone in the ever-expanding use of social media—it is common in all scientific fields and, indeed, walks of life. Social communities focusing on fitness, sport training, and nutrition are also widespread, and it is now

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Izzeldin Ibrahim, Eiman Al Hammadi, Suzan Sayegh, Lena Zimmo, Jwaher Al Neama, Husam Rezeq, Abdulla Saeed Al-Mohannadi and Al Anoud Al-Thani

Card Leadership (RCL) Team was established at Aspetar Orthopaedic and Sport Medicine Hospital, in collaboration with Stakeholder Group (SG) including members from well-established governmental and academic institutions in Qatar: Ministry of Public Health, Ministry of Education and Higher Education, and

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Hyun Chul Jung, Myong Won Seo, Sukho Lee, Sung Woo Jung and Jong Kook Song

: Academic Press . Constantini , N.W. , Arieli , R. , Chodick , G. , & Dubnov-Raz , G. ( 2010 ). High prevalence of vitamin D insufficiency in athletes and dancers . Clinical Journal of Sport Medicine, 20 , 368 – 371 . PubMed ID: 20818195 doi:10.1097/JSM.0b013e3181f207f2 10.1097/JSM.0b013e3181

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Martin C. Waller, Deborah A. Kerr, Martyn J. Binnie, Emily Eaton, Clare Wood, Terreen Stenvers, Daniel F. Gucciardi, Carmel Goodman and Kagan J. Ducker

.A. , Fung , T.S. , Doyle-Baker , P.K. , Verhoef , M.J. , & Reimer , R.A. ( 2007 ). Dietary supplementation of high-performance Canadian athletes by age and gender . Clinical Journal of Sport Medicine, 17 , 458 – 464 . doi:10.1097/JSM.0b013e31815aed33 10.1097/JSM.0b013e31815aed33 Erdman , K

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David G. Behm

the aforementioned sports are individual sports, which would skew those data to higher socioeconomic families. The authors mentioned that the low-income families would also be less likely to seek medical intervention from specialists in sport medicine clinics, which was a main recruiting outlet for

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Carl Persson, Flinn Shiel, Mike Climstein and James Furness

fracture in runners . Clinical Journal of Sport Medicine, 15 ( 3 ), 136 – 141 . PubMed ID: 15867555 doi:10.1097/01.jsm.0000165489.68997.60 10.1097/01.jsm.0000165489.68997.60 Fuller , J.T. , Archer , J. , Buckley , J.D. , Tsiros , M.D. , & Thewlis , D. ( 2016 ). The reliability of dual