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Washino S, Murai A, Mankyu H, Ogita F, Kanehisa H, Yoshitake Y. The projected frontal area and its components during front crawl depend on lung volume. Scand J Med Sci Sports 2022; 32:1724-1737. [PMID: 36086887 DOI: 10.1111/sms.14231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/22/2022] [Accepted: 09/05/2022] [Indexed: 11/26/2022]
Abstract
We examined the influence of lung volume on the vertical body position, trunk inclination, and projected frontal area (PFA) during swimming and the inter-relationships among these factors. Twelve highly trained male swimmers performed a 15 m front crawl with sustained maximal inspiration (INSP), maximal expiration (EXP), and intermediate (MID) at a target velocity of 1.20 m·s-1 . Using our developed digital human model, which allows inverse kinematics calculations by fitting individual body shapes measured with a three-dimensional photonic image scanner to individually measured underwater motion capture data, vertical center of mass (CoM) position, trunk inclination, and PFA were calculated for each complete stroke cycle. In particular, the PFA was calculated by automatic processing of a series of parallel frontal images obtained from a reconstructed digital human model. The vertical CoM position was higher with a larger lung-volume level (P < 0.01). The trunk inclination was smaller in INSP and MID than in EXP (P < 0.01). PFA was smaller with a larger lung-volume level (P < 0.01). Additionally, there was a significant interaction of vertical CoM position and trunk inclination with PFA (P = 0.006). There was a negative association between PFA and vertical CoM position, and a positive association between PFA and trunk inclination less than the moderate vertical CoM position (each P < 0.05). These results obtained using our methodology indicate that PFA decreases with increasing lung volume due to an increase in vertical CoM position, and additionally due to a decrease in trunk inclination at low-to-moderate lung-volume levels.
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Affiliation(s)
- Sohei Washino
- Human Augmentation Research Center, National Institute of Advanced Industrial Science and Technology, Chiba, Japan
| | - Akihiko Murai
- Human Augmentation Research Center, National Institute of Advanced Industrial Science and Technology, Chiba, Japan.,PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
| | - Hirotoshi Mankyu
- Department of Coaching of Sports and Budo, National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan
| | - Futoshi Ogita
- Department of Sports and Life Sciences, National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan
| | - Hiroaki Kanehisa
- Department of Sports and Life Sciences, National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan.,School of Sports and Health Sciences, Ritsumeikan University, Kusatsu, Shiga, Japan
| | - Yasuhide Yoshitake
- Graduate School of Science and Technology, Shinshu University, Ueda, Nagano, Japan.,School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland, Australia
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2
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Wong C, Andersen TB. Evaluation of Brace Treatment Using the Soft Brace Spinaposture: A Four-Years Follow-Up. J Clin Med 2022; 11:jcm11010264. [PMID: 35012005 PMCID: PMC8745903 DOI: 10.3390/jcm11010264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 12/29/2021] [Accepted: 12/31/2021] [Indexed: 02/05/2023] Open
Abstract
The braces of today are constructed to correct the frontal plane deformity of idiopathic adolescent scoliosis (AIS). The Spinaposture brace© (Spinaposture Aps, Copenhagen, Denmark) is a soft-fabric brace for AIS and is designed to enhance rotational axial stability by inducing a sagittal plane kyphotic correction. This prospective observational study evaluated the brace in fifteen patients with AIS. The initial average CA was 16.8° (SD: 2.8). They were followed prospectively every 3 to 6 months during their brace usage until skeletal maturity of 25 months and at long-term follow-up of 44 months. In- and out-of-brace radiographs were performed in six subjects at inclusion. This resulted in an immediate in-brace correction of 25.3 percent in CA (14.3°→10.8°) and induced a kyphotic effect of 14.9 percent (40.8°→47.9°). The average in-brace improvement at first follow-up was 4.5° in CA, and the CA at skeletal maturity was 11° (SD: 7.4°) and long-term 12.0° (SD: 6.8°). In conclusion, the Spinaposture brace© had an immediate in-brace deformity correction and a thoracic kyphotic effect. At skeletal maturity, the deformities improved more than expected when compared to that of the natural history/observation and similar to that of other soft braces. No long-term deformity progression was seen. To substantiate these findings, stronger designed studies with additional subjects are needed.
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Affiliation(s)
- Christian Wong
- Department of Orthopedics, Hvidovre Hospital, Kettegaards Alle 30, 2650 Hvidovre, Denmark
- Correspondence: ; Tel.: +45-38-62-66-69
| | - Thomas B. Andersen
- Department of Orthopedics, National University Hospital, Blegdamsvej 9, 2100 Copenhagen, Denmark;
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Yañez-Sepulveda R, Alvear-Ordenes I, Tapia-Guajardo A, Verdugo-Marchese H, Cristi-Montero C, Tuesta M. Inspiratory muscle training improves the swimming performance of competitive young male sprint swimmers. J Sports Med Phys Fitness 2021; 61:1348-1353. [PMID: 33480510 DOI: 10.23736/s0022-4707.21.11769-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Inspiratory muscle training (IMT) stimulates the strengthening of the respiratory muscles by placing a resistance to the entry of air into the lung. The objective was to observe the effect of IMT on swimming performance, and its relationship with inspiratory strength and lung function. METHODS Fifteen male swimmers (age=15.1±1.1 years) were divided into an experimental group (EG; N.=9) and a sham control group (SCG; N.=6). Lung flows/volumes using spirometry, dynamic inspiratory strength (S-Index), maximum inspiratory flow (MIF), and swimming tests (50-m, 100-m and 200-m) were measured before and after a four-week aerobic swimming training program (R1-R2) and IMT. An initial load at 50% and 15% of S-Index was adjusted for EG and SCG respectively. Only the EG increased the initial load by 5% each week. RESULTS The S-Index and MIF were only increased in the EG after IMT (∆S-Index=18.0±8.8 cmH<inf>2</inf>O and ∆MIF=0.7±0.33 L·min-1; P<0.05). The same occurred for FVC (∆=0.3±0.2 l), and MVV (∆=6.9±3.6 l·min-1) (P<0.05). For swimming performances, the EG swimming times decreased significantly respect to CG for 50-m (∆<inf>EG</inf>=-1.2±0.3 s vs. ∆<inf>CG</inf>=-0.1±0.2 s), 100-m (∆<inf>EG</inf>=-2.9±1 s vs. ∆<inf>CG</inf>=-0.7±0.5 s) and 200-m (∆<inf>EG</inf>=-7.3±2.8 s vs. ∆<inf>CG</inf>=-2.0±1 s) with P<0.05. Finally, the S-Index and MIF had a negative correlation with swimming performances for 50-m (S-Index, r=-0.72; MIF, r=-0.70) and 100-m (S-Index, r=-0.65; MIF, r=-0.62) with P<0.05. CONCLUSIONS A short-period IMT increases the maximum S-Index, ventilation and MIF which positively influence the swimming performance of young swimmers.
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Affiliation(s)
- Rodrigo Yañez-Sepulveda
- Physical Education School, Universidad Viña del Mar, Viña del Mar, Chile.,Laboratory of Applied Physiology (FISAP), Institute of Biomedicine (IBIOMED), Universidad de León, León, Spain
| | - Ildefonso Alvear-Ordenes
- Laboratory of Applied Physiology (FISAP), Institute of Biomedicine (IBIOMED), Universidad de León, León, Spain
| | | | | | - Carlos Cristi-Montero
- School of Physical Education, IRyS Group, Pontificia Universidad Catolica de Valparaíso, Valparaíso, Chile
| | - Marcelo Tuesta
- Laboratory of Sport Sciences, Centro de Medicina Deportiva Sports MD, Viña del Mar, Chile - .,School of Kinesiology, Universidad Andres Bello, Viña del Mar, Chile
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Lomax M, Kapus J, Brown PI, Faghy M. Impact of Weekly Swimming Training Distance on the Ergogenicity of Inspiratory Muscle Training in Well-Trained Youth Swimmers. J Strength Cond Res 2019; 33:2185-2193. [PMID: 31344014 DOI: 10.1519/jsc.0000000000002375] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Lomax, M, Kapus, J, Brown, PI, and Faghy, M. Impact of weekly swimming training distance on the ergogenicity of inspiratory muscle training in well-trained youth swimmers. J Strength Cond Res 33(8): 2185-2193, 2019-The aim of this study was to examine the impact of weekly swimming training distance on the ergogenicity of inspiratory muscle training (IMT). Thirty-three youth swimmers were recruited and separated into a LOW and HIGH group based on weekly training distance (≤31 km·wk and >41 km·wk, respectively). The LOW and HIGH groups were further subdivided into control and IMT groups for a 6-week IMT intervention giving a total of 4 groups: LOWcon, LOWIMT, HIGHcon, and HIGHIMT. Before and after the intervention period, swimmers completed maximal effort 100- and 200-m front crawl swims, with maximal inspiratory and expiratory mouth pressures (PImax and PEmax, respectively) assessed before and after each swim. Inspiratory muscle training increased PImax (but not PEmax) by 36% in LOWIMT and HIGHIMT groups (p ≤ 0.05), but 100- and 200-m swims were faster only in the LOWIMT group (3 and 7% respectively, p ≤ 0.05). Performance benefits only occurred in those training up to 31 km·wk and indicate that the ergogenicity of IMT is affected by weekly training distance. Consequently, training distances are important considerations, among others, when deciding whether or not to supplement swimming training with IMT.
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Affiliation(s)
- Mitch Lomax
- Department of Sport and Exercise Science, University of Portsmouth, Portsmouth, United Kingdom
| | - Jernej Kapus
- Laboratory of Biodynamics, Faculty of Sports, University of Ljubljana, Ljubljana, Slovenia
| | - Peter I Brown
- English Institute of Sport, Loughborough Performance Center, Loughborough University, Loughborough, United Kingdom
| | - Mark Faghy
- Sport, Outdoor and Exercise Science, University of Derby, Derby, United Kingdom
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Pilarski JQ, Leiter JC, Fregosi RF. Muscles of Breathing: Development, Function, and Patterns of Activation. Compr Physiol 2019; 9:1025-1080. [PMID: 31187893 DOI: 10.1002/cphy.c180008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review is a comprehensive description of all muscles that assist lung inflation or deflation in any way. The developmental origin, anatomical orientation, mechanical action, innervation, and pattern of activation are described for each respiratory muscle fulfilling this broad definition. In addition, the circumstances in which each muscle is called upon to assist ventilation are discussed. The number of "respiratory" muscles is large, and the coordination of respiratory muscles with "nonrespiratory" muscles and in nonrespiratory activities is complex-commensurate with the diversity of activities that humans pursue, including sleep (8.27). The capacity for speech and adoption of the bipedal posture in human evolution has resulted in patterns of respiratory muscle activation that differ significantly from most other animals. A disproportionate number of respiratory muscles affect the nose, mouth, pharynx, and larynx, reflecting the vital importance of coordinated muscle activity to control upper airway patency during both wakefulness and sleep. The upright posture has freed the hands from locomotor functions, but the evolutionary history and ontogeny of forelimb muscles pervades the patterns of activation and the forces generated by these muscles during breathing. The distinction between respiratory and nonrespiratory muscles is artificial, as many "nonrespiratory" muscles can augment breathing under conditions of high ventilator demand. Understanding the ontogeny, innervation, activation patterns, and functions of respiratory muscles is clinically useful, particularly in sleep medicine. Detailed explorations of how the nervous system controls the multiple muscles required for successful completion of respiratory behaviors will continue to be a fruitful area of investigation. © 2019 American Physiological Society. Compr Physiol 9:1025-1080, 2019.
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Affiliation(s)
- Jason Q Pilarski
- Department of Biological and Dental Sciences, Idaho State University Pocatello, Idaho, USA
| | - James C Leiter
- Department of Molecular and Systems Biology, The Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Ralph F Fregosi
- Departments of Physiology and Neuroscience, The University of Arizona, Tucson, Arizona, USA
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Lomax M, Kapus J, Webb S, Ušaj A. The effect of inspiratory muscle fatigue on acid-base status and performance during race-paced middle-distance swimming. J Sports Sci 2019; 37:1499-1505. [PMID: 30724711 DOI: 10.1080/02640414.2019.1574250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The aim of this study was to investigate the effect of pre-induced inspiratory muscle fatigue (IMF) on race-paced swimming and acid-base status. Twenty-one collegiate swimmers performed two discontinuous 400-m race-paced swims on separate days, with (IMF trial) and without (control trial) pre-induced IMF. Swimming characteristics, inspiratory and expiratory mouth pressures, and blood parameters were recorded. IMF and expiratory muscle fatigue (P < 0.05) were evident after both trials and swimming time was slower (P < 0.05) from 150-m following IMF inducement. Pre-induced IMF increased pH before the swim (P < 0.01) and reduced bicarbonate (P < 0.05) and the pressure of carbon dioxide (PCO2) (P < 0.05). pH (P < 0.05), bicarbonate (P < 0.01) and PCO2 (P < 0.05) were lower during swimming in the IMF trial. Blood lactate was similar before both trials (P > 0.05) but was higher (P < 0.01) in the IMF trial after swimming. Pre-induced IMF induced respiratory alkalosis, reduced bicarbonate buffering capacity and slowed swimming speed. Pre-induced and propulsion-induced IMF reflected metabolic acidosis arising from dual role breathing and propulsion muscle fatigue.
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Affiliation(s)
- Mitch Lomax
- a Department of Sport and Exercise Science , University of Portsmouth , Portsmouth , UK
| | - Jernej Kapus
- b Faculty of Sport , University of Ljubljana , Ljubljana , Slovenia
| | - Samuel Webb
- a Department of Sport and Exercise Science , University of Portsmouth , Portsmouth , UK
| | - Anton Ušaj
- b Faculty of Sport , University of Ljubljana , Ljubljana , Slovenia
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Dos Reis IMM, Ohara DG, Januário LB, Basso-Vanelli RP, Oliveira AB, Jamami M. Surface electromyography in inspiratory muscles in adults and elderly individuals: A systematic review. J Electromyogr Kinesiol 2019; 44:139-155. [PMID: 30658230 DOI: 10.1016/j.jelekin.2019.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 07/21/2018] [Accepted: 01/09/2019] [Indexed: 12/31/2022] Open
Abstract
INTRODUCTION Electromyography (EMG) helps to evaluate disorders and pulmonary behavior, as impairments in respiratory muscle function are associated with the development of diseases. There is a wide range of methods and protocols used to record and analyze EMG obtained from respiratory muscles, demonstrating a lack of standardization. OBJECTIVE To identify the most common procedures used to record surface EMG (sEMG) of inspiratory muscles in adults and elderly individuals through a systematic review (primary), and to evaluate the quality of the report presented by the studies (secondary). METHOD Studies published from January 1995 until June 2018 were searched for in the Web of Science, PubMed, LILACS, EBSCO and Embase databases. Only studies evaluating sEMG of inspiratory muscles were included. RESULTS The electronic search retrieved a total of 6697 titles and 92 of them were included. A great variability on the methods applied to both recording and processing/analyzing data was found. Therefore, the synthesis of practical/clinical evidence to support immediate recommendations was impaired. In general, the descriptions presented by the studies are poor. CONCLUSION The most common procedures used for sEMG were identified. Methodological studies with objective comparisons were fundamental for improving standardization, given the impossibility of recommendations from this review.
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Affiliation(s)
- Ivanize Mariana Masselli Dos Reis
- Department of Physical Therapy, Biological and Health Sciences Center, Federal University of São Carlos (UFSCar), São Carlos/SP, Brazil; Spirometry and Respiratory Physiotherapy Laboratory (LEFiR) at UFSCar, São Carlos/SP, Brazil.
| | - Daniela Gonçalves Ohara
- Department of Physical Therapy, Biological and Health Sciences Center, Federal University of São Carlos (UFSCar), São Carlos/SP, Brazil; Federal University of Amapá (UNIFAP), Macapá/AP, Brazil
| | - Letícia Bergamin Januário
- Department of Physical Therapy, Biological and Health Sciences Center, Federal University of São Carlos (UFSCar), São Carlos/SP, Brazil; Laboratory of Clinical and Occupational Kinesiology (LACO) at UFSCar, São Carlos/SP, Brazil
| | - Renata Pedrolongo Basso-Vanelli
- Department of Physical Therapy, Biological and Health Sciences Center, Federal University of São Carlos (UFSCar), São Carlos/SP, Brazil; University Hospital of UFSCar, São Carlos/SP, Brazil
| | - Ana Beatriz Oliveira
- Department of Physical Therapy, Biological and Health Sciences Center, Federal University of São Carlos (UFSCar), São Carlos/SP, Brazil; Laboratory of Clinical and Occupational Kinesiology (LACO) at UFSCar, São Carlos/SP, Brazil
| | - Mauricio Jamami
- Department of Physical Therapy, Biological and Health Sciences Center, Federal University of São Carlos (UFSCar), São Carlos/SP, Brazil; Spirometry and Respiratory Physiotherapy Laboratory (LEFiR) at UFSCar, São Carlos/SP, Brazil
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Yilmaz ÖF, Özdal M. Acute, chronic, and combined pulmonary responses to swimming in competitive swimmers. Respir Physiol Neurobiol 2018; 259:129-135. [PMID: 30217724 DOI: 10.1016/j.resp.2018.09.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 08/10/2018] [Accepted: 09/10/2018] [Indexed: 11/30/2022]
Abstract
The combined effects of swimming on the inspiratory muscles and pulmonary functions are not well known. The aim of the present study was to determine the acute, chronic, and combined effects of swimming on the pulmonary functions and respiratory muscles of competitive swimmers. Thirty males (15 in the experimental group [EG] and 15 in the control group [CG]) participated in this study. The EG subjects participated in an 8-week swim training program and performed 1 day before and after an 8-week 100-m swimming event. Pulmonary functions and respiratory muscle strength were measured immediately before and after the swimming event in the EG and before and after an 8-week period in the CG. The obtained data were analyzed using repeated measures one-way analysis of variance, least significant difference, and independent- and paired-sample t-tests. Swimming exerted negative acute effects (p < 0.05) and positive chronic effects (p < 0.05) on respiratory muscle strength and pulmonary functions. Further, the negative acute effects decreased the combined effects of the chronic and acute effects of swimming on respiratory muscle strength and pulmonary functions (p < 0.05). The results indicated that swimming exerts negative acute, positive chronic, and combined effects on respiratory muscle strength and pulmonary functions.
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Affiliation(s)
- Ömer Faruk Yilmaz
- Department of Physical Education and Sport, Institution of Gaziantep University, Lab of Gaziantep University Performance Laboratory, Turkey.
| | - Mustafa Özdal
- Department of Physical Education and Sport, Institution of Gaziantep University, Lab of Gaziantep University Performance Laboratory, Turkey.
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Hartz CS, Sindorf MAG, Lopes CR, Batista J, Moreno MA. Effect of Inspiratory Muscle Training on Performance of Handball Athletes. J Hum Kinet 2018; 63:43-51. [PMID: 30279940 PMCID: PMC6162985 DOI: 10.2478/hukin-2018-0005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Inspiratory muscle training (IMT) is a strategy that has been used to improve performance in different sports modalities. This study investigated the effects of an IMT program on respiratory muscle strength and resistance as well as aerobic physical performance (PP) of handball athletes. Nineteen 20 ± 3 year-old male athletes were allocated into an experimental (EG, n = 10) or a placebo group (PG, n = 9). Their respiratory muscle strength was evaluated by measuring the maximum inspiratory and expiratory pressures (MIP and MEP), muscular respiratory resistance by maximum voluntary ventilation (MVV) and aerobic PP by the cardiopulmonary exercise test. The study was designed to evaluate the effects of a 12-week IMT program with five sessions a week. A significant difference was observed in the pre and post IMT values of the MIP (170 ± 34 to 262 ± 33 cmH2O) and MEP (177 ± 36 to 218 ± 37 cmH2O) in the EG, and MIP (173 ± 45 to 213 ± 21 cmH2O) in the PG, with a large effect size for the MIP, when the groups were compared. MVV showed a significant increase (162 ± 24 to 173 ± 30 L) in the EG, with a small effect size. There was a significant difference in maximum oxygen uptake (54 ± 8 to 60 ± 7 ml/kg/min) in aerobic PP. Oxygen uptake at the respiratory compensation point (RCP) (46 ± 6 to 50 ± 5 ml/kg/min), with a moderate effect size for both variables, was observed in the EG after IMT. We concluded that IMT provided a significant increase in respiratory muscle strength and resistance, contributing to increased aerobic PP in the EG, which suggests that IMT could be incorporated in handball players' training.
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Affiliation(s)
- Charlini S. Hartz
- Postgraduate Program in Human Movement Sciences - Methodist University of Piracicaba - UNIMEP - Piracicaba, São Paulo, Brazil
| | - Márcio A. G. Sindorf
- Postgraduate Program in Human Movement Sciences - Methodist University of Piracicaba - UNIMEP - Piracicaba, São Paulo, Brazil
| | - Charles R. Lopes
- Postgraduate Program in Human Movement Sciences - Methodist University of Piracicaba - UNIMEP - Piracicaba, São Paulo, Brazil
- Adventist College of Hortolândia, Hortolândia, São Paulo, Brazil
| | - José Batista
- Postgraduate Program in Human Movement Sciences - Methodist University of Piracicaba - UNIMEP - Piracicaba, São Paulo, Brazil
| | - Marlene A. Moreno
- Postgraduate Program in Human Movement Sciences - Methodist University of Piracicaba - UNIMEP - Piracicaba, São Paulo, Brazil
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Özdal M. Influence of an eight-week core strength training program on respiratory muscle fatigue following incremental exercise. ISOKINET EXERC SCI 2016. [DOI: 10.3233/ies-160621] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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