Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
©Journal of Sports Science and Medicine (2016) 15, 451 - 459

Research article
Psycho-Physiological Responses of Obese Adolescents to an Intermittent Run Test Compared with a 20-M Shuttle Run
Olivier Rey1,2, , Christophe Maïano3, Caroline Nicol4, Charles-Symphorien Mercier5, Jean-Marc Vallier1,2
Author Information
1 Université de Toulon, LAMHESS, France
2 Université Côte d'Azur, LAMHESS, Nice, France
3 Cyberpsychology Laboratory, Department of Psychoeducation and Psychology, Université du Québec en Outaouais (UQO), Canada
4 Aix Marseille Univ, CNRS, ISM, Inst. Movement Sci, Marseille, France
5 “AJO® Les Oiseaux”, Pediatric Obesity Follow-up and Rehabilitation Care, Le Noble Age Group, Sanary-sur-Mer, France

Olivier Rey
✉ LAMHESS - Laboratoire Motricité Humaine, Education, Sport, Santé - UTLN, CS 60584-83041 TOULON CEDEX 9, France
Publish Date
Received: 20-03-2016
Accepted: 13-06-2016
Published (online): 05-08-2016
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Among the running field tests that measure aerobic fitness indirectly, the 20-m shuttle run test is the one most commonly used among obese youth. However, this back and forth running test induces premature cessation of exercise in this population. The present study aimed to examine the psycho-physiological responses of obese adolescents to an intermittent (15-15) progressive and maximal run test as compared with a continuous shuttle run test. Eleven obese adolescents (age: 14-15 years; BMI = 34.01 ± 5.30 kg·m-2) performed both tests. A two-way ANOVA examined the main effects of the running test, participant’s sex, and their interaction on maximal aerobic performance (net exercise duration and final velocity), physiological values (heart rate, pulmonary oxygen uptake, respiratory exchange ratio and blood lactate concentration) and psychological responses (rating of perceived exertion, and physical self-perceptions). Oxygen uptake and heart-rate values at 9 km·h-1 were also compared. Compared with a 20-m shuttle run, the 15-15 test induced lower pulmonary oxygen uptake values at 9 km/h (28.3 ± 2.7 vs. 35.4 ± 2.7 ml·min-1·kg-1) and finished with higher maximal velocity and net exercise duration (566 ± 156 vs. 346 ± 156 s, p < 0.001), with no inter-test physiological difference. The 15-15 test also resulted in higher ratings of perceived exertion (16.0 ± 1.2 vs. 12.7 ± 1.6, p < 0.001) and improved perceived physical condition compared with the 20-m shuttle run (+1.4 ± 1.4 vs. +0.2 ± 1.0, p < 0.05). Both tests induced a maximal aerobic power of obese adolescents, but the 15-15 test provided a more progressive speed increment and longer exercise duration. The 15-15 test also elicited a significant improvement of perceived physical condition. In conclusion the 15-15 test can be considered a relevant field test for assessing the aerobic fitness of obese adolescents.

Key words: Running test, aerobic fitness, paediatric obesity, physical self

           Key Points
  • In agreement with the previous results of Rey et al. (2013), the present study shows that obese adolescents demonstrated similar maximum physiological responses in both tests. However, they reached significantly higher running speeds and reported higher perceived physical condition in the 15-15 compared with a 20-m shuttle run test.
  • The 15-15 intermittent test is considered more suitable for obese adolescents, rather than the shuttle run test due to its progressive nature and its lack of directional change.
  • This 15-15 intermittent test will be helpful for practitioners to assess and promote exercise programs of similar nature and to promote perceived physical condition of obese adolescents.
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