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Micheal J. Luera, Brittany Dowling, Tyler W.D. Muddle and Nathaniel D.M. Jenkins

cameras were arranged in a ring around the mound. Position coordinate data of the reflective markers were collected using a 480-Hz Raptor-E motion analysis system (Motion Analysis Corp, Santa Rosa, CA). The global coordinate system was set up to the International Society of Biomechanics (ISB) global

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Dimitrios-Sokratis Komaris, Cheral Govind, Andrew Murphy, Alistair Ewen and Philip Riches

biomechanics of the sit-to-stand and sit-to-walk movement, in people with disabilities, has been previously reported. 18 – 21 The identification of movement strategies, or the study of their effects, has been achieved via questionnaires, video observation, and motion analysis. 22 – 26 Pushing through the

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Desiree Camara Miraldo, Renato Naville Watanabe and Marcos Duarte

). Open source platform for collaborative construction of wearable sensor datasets for human motion analysis and an application for gait analysis . Journal of Biomedical Informatics, 63, 249 – 258 . PubMed ID: 27593165 doi:10.1016/j.jbi.2016.08.025 10.1016/j.jbi.2016.08.025 Lyons , G.M. , Sinkjær

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Bradley J. Monteleone, Janet L. Ronsky, Willem H. Meeuwisse and Ronald F. Zernicke

Ankle function is frequently measured using static or dynamic tasks in normal and injured patients. The purpose of this study was to develop a novel task to quantify ankle dynamics and muscle activity in normal subjects. Twelve subjects with no prior ankle injuries participated. Video motion analysis cameras, force platforms, and an EMG system were used to collect data during a lateral hop movement task that consisted of multiple lateral-medial hops over an obstacle. Mean (SD) inversion ankle position at contact was 4.4° (4.0) in the medial direction and –3.5° (4.4) in the lateral direction; mean (SD) tibialis anterior normalized muscle activity was 0.11 (0.08) in the medial direction and 0.16 (0.13) in the lateral direction. The lateral hop movement was shown to be an effective task for quantifying ankle kinematics, forces, moments, and muscle activities in normal subjects. Future applications will use the lateral hop movement to assess subjects with previous ankle injuries in laboratory and clinical settings.

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Helmi Chaabène, Emerson Franchini, Bianca Miarka, Mohamed Amin Selmi, Bessem Mkaouer and Karim Chamari

Purpose:

The aim of this study was to measure and compare physiological and time–motion variables during karate fighting and to assess eventual differences between winners and defeated elite karatekas in an ecologically valid environment.

Methods:

Fourteen elite male karatekas who regularly participated in national and international events took part in a national-level competition.

Results:

There were no significant differences between winners and defeated karatekas regarding all the studied variables. Karatekas used more upper-limb (76.19%) than lower-limb techniques (23.80%). The kisami-zuki represented the most frequent technique, with 29.1% of all used techniques. The duration of each fighting activity ranged from <1 s to 5 s, with 83.8% ± 12.0% of the actions lasting less than 2 s. Karatekas executed 17 ± 7 high-intensity actions per fight, which corresponded to ~6 high-intensity actions per min. Action-to-rest ratio was about 1:1.5, and high-intensityaction- to-rest ratio was ~1:10. The mean blood lactate response at 3 min postcombat (Lapost) elicited during karate fighting was 11.18 ± 2.21 mmol/L (difference between Lapre and Lapost = 10.01 ± 1.81 mmol/L). Mean heart rate (HR) was 177 ± 14 beats/min (91% ± 5% of HRpeak). Karatekas spent 65% of the time exercising at HR >90% of the individual HRpeak.

Conclusion:

Karatekas predominantly use upper-limb karate techniques. Karate’s nature is intermittent, with fighting activities representing ~6% of total combat’s duration and ~84% of actions lasting less than 2 s, with ~21-s mean time interval in between. Kumite combat sessions induced high La and near-maximal cardiovascular strain. Other key success factors should be investigated to properly discriminate winners and defeated athletes.

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Heita Goto and James A. King

.1080/24733938.2017.1283433 10.1080/24733938.2017.1283433 28134013 13. Gabbett TJ , Mulvey M . Time–motion analysis of small sided training games and competition in elite women soccer players . J Strength Cond Res . 2008 ; 22 : 543 – 52 . PubMed ID: 18550972 doi:10.1519/JSC.0b013e3181635597 10.1519/JSC.0b013e3181635597

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Daniel M. Grindle, Lauren Baker, Mike Furr, Tim Puterio, Brian Knarr and Jill Higginson

30 seconds to 3 minutes in length. The order of the 8 walking trials was randomized for each subject. Kinematic and kinetic data for each walking trial was collected by an 8-camera motion analysis system at 60 Hz, (Motion Analysis Corp, Santa Rosa, CA) as participants walked at 2.4 and 4.0 km·h −1

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Mark A. Sutherlin, L. Colby Mangum, Shawn Russell, Susan Saliba, Jay Hertel and Joe M. Hart

electromagnetic motion capture system (trakSTAR; Ascension Technologies Corp, an NDI Company, Shelburne, VT) sampled at 144 Hz. Force, joint moments, and angles were exported using the MotionMonitor software (Innovative Sports Training, Inc, Chicago, IL). 23 Three-dimensional motion analysis setup consisted of 8

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Karin Fischer-Sonderegger, Wolfgang Taube, Martin Rumo and Markus Tschopp

R , Thomas K . Time-motion analysis of acceleration demands of 4v4 small-sided soccer games played on different pitch sizes . Hum Mov Sci . 2014 ; 33 : 25 – 32 . PubMed ID: 24576705 doi:10.1016/j.humov.2013.12.002 10.1016/j.humov.2013.12.002 24576705 15. Sonderegger K , Tschopp M , Taube

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Rumit S. Kakar, Hilary B. Greenberger and Patrick O. McKeon

enhancing functional outcomes, depending on the length of the tape and area covered. Our study offers further guidance to future research utilizing 2D motion analysis to examine knee pathomechanics in sagittal and frontal planes and highlights a potential beneficial effect associated with patellar taping