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Martin Buchheit, Yannick Cholley and Philippe Lambert

Purpose:

To examine in elite soccer players after traveling across 6 time zones some psychometric and physiological responses to a competitive camp in the heat.

Methods:

Data from 12 elite professional players (24.6 ± 5.3 y) were analyzed. They participated in an 8-d preseason summer training camp in Asia (heat index 34.9°C ± 2.4°C). Players’ activity was collected during all training sessions and the friendly game using 15-Hz GPS. Perceived training/playing load was estimated using session rating of perceived exertion (RPE) and training/match duration. Psychometric measures of wellness were collected on awakening before, during, and after the camp using simple questionnaires. Heart-rate (HR) response to a submaximal 4-min run (12 km/h) and the ratio between velocity and force-load (accelerometer-derived measure, a marker of neuromuscular efficiency) response to four ~60-m runs (22–24 km/h) were collected before, at the end of, and after the camp.

Results:

After a large increase, the RPE:m/min ratio decreased substantially throughout the camp. There were possible small increases in perceived fatigue and small decreases in subjective sleep quality on the 6th day. There were also likely moderate (~3%) decreases in HR response to the submaximal run, both at the end of and after the camp, which were contemporary to possible small (~8%) and most likely moderate (~19%) improvements in neuromuscular efficiency, respectively.

Conclusions:

Despite transient increases in fatigue and reduced subjective sleep quality by the end of the camp, these elite players showed clear signs of heat acclimatization that were associated with improved cardiovascular fitness and neuromuscular running efficiency.

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Igor E.J. Magalhães, Rinaldo A. Mezzarane and Rodrigo L. Carregaro

 al . Kinesiotaping enhances the rate of force development but not the neuromuscular efficiency of physically active young men . J Electromyogr Kinesiol . 2016 ; 28 : 123 – 129 . PubMed ID: 27128956 doi: 10.1016/j.jelekin.2016.04.003 27128956 7. Kase K , Wallis J , Kase T , Association KT . Clinical

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Scott W. Cheatham and Morey J. Kolber

neuromuscular efficiency during a lunge . J Athl Train . 2015 ; 50 ( 2 ): 133 – 140 . PubMed doi:10.4085/1062-6050-49.5.03 10.4085/1062-6050-49.5.03 25415414 27. Fischer AA . Pressure threshold meter: its use for quantification of tender spots . Arch Phys Med Rehabil . 1986 ; 67 ( 11 ): 836 – 838

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Jan Wilke, Philipp Niemeyer, Daniel Niederer, Robert Schleip and Winfried Banzer

-joint range of motion and neuromuscular efficiency during a lunge . J Athl Train . 2015 ; 50 : 133 – 140 . PubMed ID: 25415414 doi:10.4085/1062-6050-49.5.03 25415414 10.4085/1062-6050-49.5.03 9. Sullivan KM , Silvey DBJ , Button DC , Behm DG . Roller-massager application to the hamstrings

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Karinna Sonálya Aires da Costa, Daniel Tezoni Borges, Liane de Brito Macedo, Caio Alano de Almeida Lins and Jamilson Simões Brasileiro

cycles can generate rearrangement strategies in balance control, such as improvement in agonist/antagonist muscle relation and in neuromuscular efficiency, which would lead to less postural oscillation. 27 However, the results of this study do not support this claim, even after increasing the challenge

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Nicola Giovanelli, Filippo Vaccari, Mirco Floreani, Enrico Rejc, Jasmine Copetti, Marco Garra, Lea Biasutti and Stefano Lazzer

neuromuscular efficiency during a lunge . J Athl Train . 2015 ; 50 : 133 – 140 . PubMed ID: 25415414 doi:10.4085/1062-6050-49.5.03 10.4085/1062-6050-49.5.03 25415414 15. Schleip R , Duerselen L , Vleeming A , et al . Strain hardening of fascia: static stretching of dense fibrous connective tissues

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Moritz Schumann, Hannah Notbohm, Simon Bäcker, Jan Klocke, Stefan Fuhrmann and Christoph Clephas

It is well accepted that regular strength training can improve the performance of endurance athletes in sports such as cycling, endurance running, cross-country skiing, and swimming. 1 These benefits are typically brought about by improvements in neuromuscular efficiency, characterized by shifts

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Julien Le Gal, Mickael Begon, Benoit Gillet and Isabelle Rogowski

. Roller-massager application to the quadriceps and knee-joint range of motion and neuromuscular efficiency during a lunge . J Athl Train . 2015 ; 50 : 133 – 140 . PubMed ID: 25415414 doi:10.4085/1062-6050-49.5.03 10.4085/1062-6050-49.5.03 25415414 19. MacDonald GZ , Penney MDH , Mullaley ME

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Scott W. Cheatham

, Button DC . Roller-massager application to the quadriceps and knee-joint range of motion and neuromuscular efficiency during a lunge . J Athl Train . 2015 ; 50 ( 2 ): 133 – 140 . PubMed ID: 25415414 doi:10.4085/1062-6050-49.5.03 10.4085/1062-6050-49.5.03 25415414 51. Junker

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Louisa D. Raisbeck, Jed A. Diekfuss, Dustin R. Grooms and Randy Schmitz

engages brain regions associated with motor control furthering our understanding of the deleterious effects of an internal focus. We consider that previous reports of poor neuromuscular efficiency, 51 reduced maximal force production, 11 and overall poorer performance resulting from an internal focus 3