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Michael Kellmann, Maurizio Bertollo, Laurent Bosquet, Michel Brink, Aaron J. Coutts, Rob Duffield, Daniel Erlacher, Shona L. Halson, Anne Hecksteden, Jahan Heidari, K. Wolfgang Kallus, Romain Meeusen, Iñigo Mujika, Claudio Robazza, Sabrina Skorski, Ranel Venter and Jürgen Beckmann

BJM , Ellis SM . Factors affecting the recovery-stress, burnout and mood state scores of elite student rugby players . S Afr J Res Sport Phys Educ Recreation . 2010 ; 32 : 41 – 54 . 39. Bompa TO , Haff GG . Periodization: Theory and Methodology of Training . 5th ed . Champaign, IL

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Frances Bevington, Katrina L. Piercy, Kate Olscamp, Sandra W. Hilfiker, Dena G. Fisher and Elizabeth Y. Barnett

change. 3 , 4 Further, as the 2018 Physical Activity Guidelines Advisory Committee concluded in its Scientific Report, “Strong evidence shows that behavior change theories and techniques are effective for increasing physical activity levels.” 3 In an effort to increase the number of Americans working

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Paul J. Collings, Diane Farrar, Joanna Gibson, Jane West, Sally E. Barber and John Wright

. Obesity and pregnancy: mechanisms of short term and long term adverse consequences for mother and child . BMJ . 2017 ; 356 : j1 . PubMed ID: 28179267 doi:10.1136/bmj.j1 28179267 10.1136/bmj.j1 4. Barker DJP . The origins of the developmental origins theory . J Intern Med . 2007 ; 261 ( 5 ): 412

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Samuel R. Nyman

of Behavioral Geriatrics, 1 ( 1 ), 33 – 42 . Johnston , M. ( 2015 ). What more can we learn from early learning theory? The contemporary relevance for behaviour change interventions . British Journal of Health Psychology, 21 ( 1 ), 1 – 10 . PubMed ID: 26482915 doi:10.1111/bjhp.12165 10

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Ui-Jae Hwang, Sung-Hoon Jung, Hyun-A Kim, Jun-Hee Kim and Oh-Yun Kwon

J . Electromyographic and kinetic analysis of two abdominal muscle performance tests . Physiother Theory Pract . 2015 ; 31 ( 8 ): 587 – 593 . doi: 10.3109/09593985.2015.1062945 26467996 34. Kibler WB , Press J , Sciascia A . The role of core stability in athletic function . Sports Med

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Ignacio Perez-Pozuelo, Thomas White, Kate Westgate, Katrien Wijndaele, Nicholas J. Wareham and Soren Brage

gravity, which can in theory all be measured but in practice usually are not in studies of free-living behavior. However, as body segments are connected, and therefore range of motion is restricted, measurements and the variables that can be mathematically derived from them tend to be highly correlated

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Noureddin Nakhostin Ansari, Parisa Alaei, Soofia Naghdi, Zahra Fakhari, Shiva Komesh and Jan Dommerholt

-analysis . Physiother Theory Pract . 2016 ; 32 ( 6 ): 438 – 445 . PubMed ID: 27458757 doi:10.1080/09593985.2016.1204401 27458757 10.1080/09593985.2016.1204401 8. Lannin NA , Novak I , Cusick A . A systematic review of upper extremity casting for children and adults with central nervous system motor disorders

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Jo Welsman and Neil Armstrong

ourselves and others have discussed, the mass exponent most often suggested for adoption is b  = 0.67, a value derived from theories of geometric similarity (see 11 , 31 ). We have observed values very close to this in large sample longitudinal data, but only after adjusting for other significant

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Mohammadreza Pourahmadi, Hamid Hesarikia, Ali Ghanjal and Alireza Shamsoddini

of a gravity-based bubble inclinometer and iPhone application for measuring standing lumbar lordosis . Physiother Theory Pract . 2014 ; 30 ( 1 ): 62 – 67 . doi:10.3109/09593985.2013.800174 10.3109/09593985.2013.800174 23862655 32. Dankaerts W , O’sullivan P , Straker L , Burnett A

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Katrina L. Piercy, Frances Bevington, Alison Vaux-Bjerke, Sandra Williams Hilfiker, Sean Arayasirikul and Elizabeth Y. Barnett

well as those with limited formal education are often less aware of the health benefits of physical activity than are people from nonminority groups and people with more education. 23 Health promotion campaigns, especially those based in theory, have been shown to be effective interventions for