MLTJ Muscles, Ligaments and Tendons Journal CIC Edizioni Internazionali 2014 April-June; 4(2): 158. ISSN: 2240-4554
Published online 2014 July 14.

Concentric and eccentric: muscle contraction or exercise? New perspective

Johnny Padulo,1,2 Karim Chamari,2,3 Alberto Concu,4 Juliano Dal Pupo,5 Guillaume Laffaye,6 Alexandro Moura Zagatto,7 and Luca Paolo Ardigò8

1 Sport Science, University e-Campus, Novedrate, Italy
2 Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia
3 Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
4 Department of Medical Sciences, Sports Physiology Lab, University of Cagliari, Italy
5 Center of Sports, Federal University of Santa Catarina Florianópolis, Santa Caterina, Brazil
6 UR CIAMS – Motor Control and Perception Group, Sport Sciences Department, Bot, Universitè Paris, France
7 Department of Physical Education, São Paulo State University, Brazil
8 School of Exercise and Sport Science, Department of Neurological and Movement Sciences, University of Verona, Italy

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.

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.

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.