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Force-Velocity Relationship in the Countermovement Jump Exercise Assessed by Different Measurement Methods

, for an accurate application of the SAM it would be preferable to use measurement methods that do not underestimate jump height (e.g., force platforms or high-speed cameras). The very large correlations observed between the three measurement methods (i.e., SAM, FP, and LVT) for the mean values of force, velocity, and power support their validity for the assessment of mechanical output under the applied loading conditions. Acknowledgements This study was funded by the Spanish Ministry of Science and Innovation (DEP2015-64350-P MINECO/FEDER). References

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A Comparison of GPS Workload Demands in Match Play and Small-Sided Games by the Positional Role in Youth Soccer

), wide defenders (WD = 10), midfielders (MF = 10) and forwards (FW = 10). Wide midfielders were not included in the study as a result of the playing formation used. Approval for the study was granted by the University of Central Lancashire Ethics Committee. Equipment External loads were determined using a GPS sampling at 5 Hz, which included a tri-axial accelerometer sampling at 100 Hz (Minimax X3, Catapult Innovations, Australia). Devices were secured between the upper scapulae, at approximately the T3-4 junction. The devices were activated 15 minutes before use

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Using Bilateral Functional and Anthropometric Tests to Define Symmetry in Cross-Country Skiers

body mass using iDXA had been proven to be less than 1% in the athletic population ( Bilsborough et al., 2014 ). Measurement of VO2max The skier’s VO 2max was evaluated using a roller ski test on a motor driven treadmill (Rodby, RL 3000, Rodby Innovation AB, Vänge, Sweden). The diagonal stride skiing technique employed used an incremental protocol starting at an inclination of 4° with a velocity of 11 km·h -1 . Thereafter the inclination increased by 1° each minute until volitional fatigue. Respiratory variables were measured using an ergo-spirometer system

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Do Strike Patterns or Shoe Conditions Have a Predominant Influence on Foot Loading?

, although forefoot running can prevent impact, peak plantar pressure was centered at the forefoot for a long period, inducing a potential risk of injury in the metatarsus/phalanx. Plantar pressure on the forefoot with RFS was lesser and push-off force was greater when cushioned shoes were used than when running barefoot. Acknowledgements The authors would like to acknowledge supports for the study from the National Natural Science Foundation of China (11772201, 11572202, 11572213) and the Innovation Program of Shanghai Municipal Education Commission (14YZ125

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The Effect of Acute and Chronic Exposure to Hypobaric Hypoxia on Loaded Squat Jump Performance

This study was supported by grants awarded by the Spanish Ministry of Science and Innovation (DEP2012-35774 & DEP2015-64350-P MINECO/FEDER) and Ministry of Education, Culture and Sport (Predoctoral Grant FPU12/00360). The authors thank the swimmers and the coach (Albert Tubella) for their collaboration and commitment to this study. References Aeberli I, Erb A, Spliethoff K, Meier D, Götze O, Frühauf H, Fox M, Finlayson GS, Gassmann M, Berneis K, Maggiorini M, Langhans W, Lutz TA. Disturbed eating at high altitude: influence of food preferences, acute mountain

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A Pilot Study of the Effect of Outsole Hardness on Lower Limb Kinematics and Kinetics during Soccer Related Movements

of this study provide scientific evidence and suggestions for the material selection of turf cleats shoes, indicating that softer material in the heel (H) region and medium hardness material in the MFF region can improve sports performance and reduce the risk of non-contact injuries. Acknowledgements The study was sponsored by the National Natural Science Foundation of China (81301600), K.C.Wong Magna Fund in Ningbo University, and Zhejiang Xinmiao Innovation Talents Scheme (2015R405094). References Aerts P, Clercq DD. Deformation characteristics of

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Effect of Pitch Size on Technical-Tactical Actions of the Goalkeeper in Small-Sided Games

1-on-1 or a high frequency of participation, SSGs can be a suitable training method, being a part of specific training of the goalkeeper. Acknowledgements The authors declare that they have no conflict of interest and this paper has not been submitted to or published in another journal. This study is part of the project entitled “Diseño, Construcción y Evaluación, según funcionalidad, normalización y seguridad de canastas de baloncesto y porterías de fútbol”, funded by the Ministry of Science and Innovation (DEP2010-16140) and the project entitled

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An Accurate and Rapid System to Identify Play Patterns in Tennis Using Video Recording Material: Break Point Situations as a Case Study

statistical, consistent basis these facts (and not only the intuitions) by means of a computer program analysis. However, regarding the mechanistic behavior of tennis players, we consider the intuitive disclosure of the facts making a player lose a final as relevant as their statistical significance. Many researchers are becoming conscious of the potential of the t-pattern analysis and they apply this tool in many different fields of study. In this work, the most important innovation was the application of the t-pattern tool to the sport of tennis. Consequently

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Changes in Impact Signals and Muscle Activity in Response to Different Shoe and Landing Conditions

thus inputs signals to the body. Acknowledgements This research was supported by the NNSF of China (11302131), the Doctoral Fund of Ministry of Education of China (20123156120003), the Innovation Program of Shanghai Municipal Education Commission (14YZ125), and the Science and Technology Commission of Shanghai (14DZ1103500). References Agel J, Olson DE, Dick R, Arendt EA, Marshall SW, Sikka RS. Descriptive epidemiology of collegiate women’s basketball injuries: National Collegiate Athletic Association Injury Surveillance System, 1988-1989 through 2003

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The effect of different decline angles on the biomechanics of double limb squats and the implications to clinical and training practice

be able to offer a controlled graduated rehabilitation environment for squatting tasks. This may also be useful in athletic training due to the greater work done by the quadriceps. This paper provides normative data to compare with individuals in recovery programs and has the potential to be used in physical conditioning and possible avoidance of overload. Acknowledgements Funding: TRUSTECH The North West NHS Innovation Service. References Alfredson H, Pietilä T, Jonsson P, Lorentzon R. Heavy-load eccentric calf muscle training for the treatment

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