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Concentric and eccentric: muscle contraction or exercise? New perspective

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(1)Letter to the editor. Johnny Padulo1,2 Karim Chamari2,3 Alberto Concu4 Juliano Dal Pupo5 Guillaume Laffaye6 Alessandro Moura Zagatto7 Luca Paolo Ardigò8. 4. 5. 6. 7. Ed. iz. 8. In te r. 3. Sport Science, University e-Campus, Novedrate, Italy Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar Department of Medical Sciences, Sports Physiology Lab, University of Cagliari, Italy Center of Sports, Federal University of Santa Catarina Florianópolis, Santa Caterina, Brazil UR CIAMS – Motor Control and Perception Group, Sport Sciences Department, Bot, Universitè Paris, France Department of Physical Education, São Paulo State University, Brazil School of Exercise and Sport Science, Department of Neurological and Movement Sciences, University of Verona, Italy. ©. C. IC. Corresponding author: Luca Paolo Ardigò School of Exercise and Sport Science, Department of Neurological and Movement Sciences, University of Verona via Felice Casorati, 43 37131 Verona, Italy E-mail: luca.ardigo@univr.it. Recently, several letters to the Editor on possible misuse of the terms “Concentric and eccentric exercises” were published on several journals: Sports Health1, Journal of Pain2, Journal of Human Kinetics3, Journal of Ultrasound in Medicine4, Journal of Sports Science and Medicine5, Acta Physiologica Hungarica6, Enfermería Clínica7. One more letter is currently in press on The Clinical Journal of Pain.. 158. Contrarily to what may seem at first sight8, to use the same letter’s title for the different journals did not affect each document’s originality. Different specific articles from each different journal were selected to detect possible misuse of terms “Concentric and Eccentric exercises”. A specific use of a letter, as a document kind, is to debate about the correct use of scientific terms to ease both articles’ comprehension and references search (i.e., through key words)9. In support of that initiative, a PubMed search throughout years from 1975 to 2012 found n = 1,582/2,302 articles using the terms “concentric/eccentric exercises” vs n = 190,087 articles using the terms “muscle contraction”. The letters were submitted for publication with the simple aim of stimulating a greater level of scientific exactness about some terms issues in research publishing. This letter conforms to required ethical standards10.. io ni. 1 2. na zi on. al i. Concentric and eccentric: muscle contraction or exercise? New perspective. References 1.. Padulo J, Laffaye G, Chamari K, Concu A. Concentric and eccentric: muscle contraction or exercise? Sports Health. 2013; 5(4):306. 2. Chamari K, Laffaye G, Ardigò LP, Padulo J. Concentric and eccentric exercise. J Pain. 2013;14(11):1531-1532. 3. Padulo J, Laffaye G, Ardigò LP, Chamari K. Concentric and eccentric: muscle contraction or exercise? J Hum Kinet. 2013; 37:5-6. 4. Padulo J, Laffaye G, Chamari K. Concentric and eccentric: muscle contraction or exercise? J Ultrasound Med. 2013; 32(11):2047-2048. 5. Padulo J, Laffaye G, Chamari K. Concentric and eccentric: muscle contraction or exercise? J Sports Sci. Med 2013;12(3): 608-609. 6. Padulo J, Laffaye G, Chamari K. Concentric and eccentric: muscle contraction or exercise? Acta Physiol Hung. 2013;100 (3):355-356. 7. Padulo J, Dal Pupo J, Laffaye G, Chamari K. Concentric and eccentric: muscle contraction or exercise? Enferm Clin. 2013; 23(4):177-178. 8. Hopkins WG, Batterham AM, Impellizzeri FM, Pyne DB, Rowlands DS. Statistical perspectives: all together NOT. Exp Physiol. 2011;96(12):1321-1323. 9. Altschuler E. Goal-line technology: American football is clear on uncertainty. Nature. 2013;498(7455):434. 10. Padulo J, Oliva F, Frizziero A, Maffulli N. Muscles, Ligaments and Tendons Journal. Basic principles and recommendations in clinical and field science research. MLTJ. 2013; 4: 250-252.. Muscles, Ligaments and Tendons Journal 2014; 4 (2): 158.

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