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Dunn RA, Luk HY, Appell CR, Jiwan NC, Keefe MS, Rolloque JJS, Sekiguchi Y. Eccentric muscle-damaging exercise in the heat lowers cellular stress prior to and immediately following future exertional heat exposure. Cell Stress Chaperones 2024; 29:472-482. [PMID: 38735625 PMCID: PMC11131061 DOI: 10.1016/j.cstres.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/22/2024] [Accepted: 05/04/2024] [Indexed: 05/14/2024] Open
Abstract
Muscle-damaging exercise (e.g., downhill running [DHR]) or heat exposure bouts potentially reduce physiological and/or cellular stress during future exertional heat exposure; however, the true extent of their combined preconditioning effects is unknown. Therefore, this study investigated the effect of muscle-damaging exercise in the heat on reducing physiological and cellular stress during future exertional heat exposure. Ten healthy males (mean ± Standard Definition; age, 23 ± 3 years; body mass, 78.7 ± 11.5 kg; height, 176.9 ± 4.7 cm) completed this study. Participants were randomly assigned into two preconditioning groups: (a) DHR in the heat (ambient temperature [Tamb], 35 °C; relative humidity [RH], 40%) and (b) DHR in thermoneutral (Tamb, 20 °C; RH, 20%). Seven days following DHR, participants performed a 45-min flat run in the heat (FlatHEAT [Tamb, 35 °C; RH, 40%]). During exercise, heart rate and rectal temperature (Trec) were recorded at baseline and every 5-min. Peripheral blood mononuclear cells were isolated to assess heat shock protein 72 (Hsp72) concentration between conditions at baseline, immediately post-DHR, and immediately pre-FlatHEAT and post-FlatHEAT. Mean Trec during FlatHEAT between hot (38.23 ± 0.38 °C) and thermoneutral DHR (38.26 ± 0.38 °C) was not significantly different (P = 0.68), with no mean heart rate differences during FlatHEAT between hot (172 ± 15 beats min-1) and thermoneutral conditions (174 ± 8 beats min-1; P = 0.58). Hsp72 concentration change from baseline to immediately pre-FlatHEAT was significantly lower in hot (-51.4%) compared to thermoneutral (+24.2%; P = 0.025) DHR, with Hsp72 change from baseline to immediately post-FlatHEAT also lower in hot (-52.6%) compared to thermoneutral conditions (+26.3%; P = 0.047). A bout of muscle-damaging exercise in the heat reduces cellular stress levels prior to and immediately following future exertional heat exposure.
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Affiliation(s)
- Ryan A Dunn
- Sports Performance Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA
| | - Hui-Ying Luk
- Applied Physiology Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA
| | - Casey R Appell
- Applied Physiology Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA
| | - Nigel C Jiwan
- Applied Physiology Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA
| | - Marcos S Keefe
- Sports Performance Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA
| | - Jan-Joseph S Rolloque
- Sports Performance Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA
| | - Yasuki Sekiguchi
- Sports Performance Laboratory, Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA.
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Negra Y, Sammoud S, Bouguezzi R, Moran J, Chaabene H. Effects of a horizontal speed deceleration training programme on measures of physical fitness in youth male handball players. J Sports Sci 2024; 42:638-645. [PMID: 38762890 DOI: 10.1080/02640414.2024.2356440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 05/09/2024] [Indexed: 05/21/2024]
Abstract
This study examined the effects of an 8-week horizontal speed deceleration training (HSDT) programme in combination with regular handball-specific training as compared with handball-specific training only in measures of physical fitness in male youth handball players. Thirty-nine players were randomly assigned to either an HSDT group (n = 18; 15.55 ± 0.24 years) or an active-control group (CG; n = 21; 14.59 ± 0.23 years). The results showed significant and large between-group differences at post-test in countermovement jump, change-of-direction speed, and repeated sprint ability (RSA) (all p < 0.01; d = 2.04 and 1.37, 1.39, 1.53, and 1.53 for the CMJ, 505 CoD, RSAbest, RSAaverage, and RSAtotal performances, respectively). The post-hoc-analysis demonstrated significant and large improvements in all measures of physical fitness in the HSDT group (∆2.49% to 16,25%; d = 1.01 to 1,70; all p < 0,01). The CG, however, failed to reach any significant difference in all measures of physical fitness ((∆0.31% to 1.98%; d = 0.15 to 0.22; p = 0.379; p > 0.05). To summarise, an 8-week in-season HSDT programme alongside regular handball-specific training yielded positive effects on various performance measures including jumping ability, CoD speed, and RSA, when compared to handball-specific training alone. These results highlight the potential benefits of integrating HSDT into the training regimen of youth handball athletes during the competitive season.
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Affiliation(s)
- Yassine Negra
- Research Laboratory (LR23JS01), Sport Performance, Health & Society, La Manouba, Tunisia
- Higher Institute of Sport and Physical Education of Ksar Saïd, University of "La Manouba", Tunisia
| | - Senda Sammoud
- Research Laboratory (LR23JS01), Sport Performance, Health & Society, La Manouba, Tunisia
| | - Raja Bouguezzi
- Research Laboratory (LR23JS01), Sport Performance, Health & Society, La Manouba, Tunisia
| | - Jason Moran
- School of Sport, Rehabilitation, and Exercise Sciences, University of Essex, Colchester, UK
| | - Helmi Chaabene
- Department of Sport Science, Chair for Health and Physical Activity/Otto-von-Guericke University Magdeburg, Magdeburg, Germany
- High Institute of Sports and Physical Education, Kef, University of Jendouba, Jendouba, Tunisia
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Kim KH, Kang SH, Kim N, Choi J, Kang S. Short-Term Impact of Low-Intensity Exercise with Blood Flow Restriction on Mild Knee Osteoarthritis in Older Adults: A Pilot Study. Healthcare (Basel) 2024; 12:308. [PMID: 38338193 PMCID: PMC10855245 DOI: 10.3390/healthcare12030308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024] Open
Abstract
This pilot study aimed to investigate the immediate impact of low-intensity exercises with blood flow restriction (BFR) on older adults with knee osteoarthritis (KOA). Fifteen patients with KOA who were over 50 years old, participated and underwent low-intensity resistance knee exercises at 30% of their one-repetition maximum with BFR three times/week for two weeks. Pre- and post-exercise assessments included pain levels, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, isokinetic knee strength, lower extremity muscle volume (via leg circumference and muscle thickness), functional performance tests (timed up-and-go [TUG] and sit-to-stand [STS]), skeletal muscle index (SMI) using bioelectrical impedance analysis, and handgrip strength (HGS). Post-exercise, there was a significant reduction in pain. WOMAC scores showed significant improvements across all three domains: pain, stiffness, and physical function. In the TUG and STS tests, completion times were significantly reduced. Thigh and calf circumferences, as well as thigh muscle thickness significantly increased after exercise. Post-exercise SMI and HGS also significantly increased. However, isokinetic knee strength did not show significant changes. In conclusion, low-intensity BFR exercises provide immediate benefits in symptoms and physical performance for patients with KOA, potentially inducing local and systemic muscle mass increase, even after a short-term intervention.
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Affiliation(s)
- Kang-Ho Kim
- Department of Rehabilitation Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea; (K.-H.K.); (N.K.)
| | - Seung-Ho Kang
- Department of Medical Device Industry, Dongguk University, Seoul 04620, Republic of Korea;
| | - Nackhwan Kim
- Department of Rehabilitation Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea; (K.-H.K.); (N.K.)
| | - Jaehyeong Choi
- Department of Rehabilitation Medicine, Armed Force Daejeon Hospital, Daejeon 34059, Republic of Korea;
| | - Seok Kang
- Department of Rehabilitation Medicine, Korea University Guro Hospital, Seoul 08308, Republic of Korea; (K.-H.K.); (N.K.)
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Bontemps B, Gruet M, Louis J, Owens DJ, Miríc S, Vercruyssen F, Erskine RM. Patellar Tendon Adaptations to Downhill Running Training and Their Relationships With Changes in Mechanical Stress and Loading History. J Strength Cond Res 2024; 38:21-29. [PMID: 38085619 DOI: 10.1519/jsc.0000000000004617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
ABSTRACT Bontemps, B, Gruet, M, Louis, J, Owens, DJ, Miríc, S, Vercruyssen, F, and Erskine, RM. Patellar tendon adaptations to downhill running training and their relationships with changes in mechanical stress and loading history. J Strength Cond Res 38(1): 21-29, 2024-It is unclear whether human tendon adapts to moderate-intensity, high-volume long-term eccentric exercise, e.g., downhill running (DR) training. This study aimed to investigate the time course of patellar tendon (PT) adaptation to short-term DR training and to determine whether changes in PT properties were related to changes in mechanical stress or loading history. Twelve untrained, young, healthy adults (5 women and 7 men) took part in 4 weeks' DR training, comprising 10 sessions. Running speed was equivalent to 60-65% V̇O2max, and session duration increased gradually (15-30 minutes) throughout training. Isometric knee extensor maximal voluntary torque (MVT), vastus lateralis (VL) muscle physiological cross-sectional area (PCSA) and volume, and PT CSA, stiffness, and Young's modulus were assessed at weeks 0, 2, and 4 using ultrasound and isokinetic dynamometry. Patellar tendon stiffness (+6.4 ± 7.4%), Young's modulus (+6.9 ± 8.8%), isometric MVT (+7.5 ± 12.3%), VL volume (+6.6 ± 3.2%), and PCSA (+3.8 ± 3.3%) increased after 4 weeks' DR (p < 0.05), with no change in PT CSA. Changes in VL PCSA correlated with changes in PT stiffness (r = 0.70; p = 0.02) and Young's modulus (r = 0.63; p = 0.04) from 0 to 4 weeks, whereas changes in MVT did not correlate with changes in PT stiffness and Young's modulus at any time point (p > 0.05). To conclude, 4 weeks' DR training promoted substantial changes in PT stiffness and Young's modulus that are typically observed after high-intensity, low-volume resistance training. These tendon adaptations seemed to be driven primarily by loading history (represented by VL muscle hypertrophy), whereas increased mechanical stress throughout the training period did not seem to contribute to changes in PT stiffness or Young's modulus.
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Affiliation(s)
- Bastien Bontemps
- Université de Toulon, Laboratoire IAPS (n°201723207F), Toulon, France
- Université Côte d'Azur, LAMHESS, Nice, France
| | - Mathieu Gruet
- Université de Toulon, Laboratoire IAPS (n°201723207F), Toulon, France
| | - Julien Louis
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom; and
| | - Daniel J Owens
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom; and
| | - Stella Miríc
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom; and
| | | | - Robert M Erskine
- School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom; and
- Institute of Sport, Exercise and Health, University College London, London, United Kingdom
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Scoubeau C, Carpentier J, Baudry S, Faoro V, Klass M. Body composition, cardiorespiratory fitness, and neuromuscular adaptations induced by a home-based whole-body high intensity interval training. J Exerc Sci Fit 2023; 21:226-236. [PMID: 36970125 PMCID: PMC10034507 DOI: 10.1016/j.jesf.2023.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/17/2023] [Accepted: 02/24/2023] [Indexed: 03/12/2023] Open
Abstract
Background/objective Bodyweight exercises performed at home could be a complementary approach to improve health-related fitness in people having little spare time and during stay-at-home periods. This study then investigated body composition, cardiorespiratory fitness, and neuromuscular adaptations to a home-based, video-directed, whole-body high-intensity interval training (WB-HIIT). Methods Fourteen subjects participated to an 8-week WB-HIIT (6 females, 23 ± 1 years) and fourteen were included in a non-exercise control group (CTL; 6 females, 24 ± 4 years). All took part to pre- and post-intervention assessments of body composition, peak oxygen uptake (VO2peak) and first ventilatory threshold (VT1; index of aerobic capacity), dynamic (leg press 3-repetition maximum) and isometric strength (knee extensors maximal isometric contractions with assessment of voluntary activation), and muscle endurance during an isometric submaximal contraction maintained till exhaustion. WB-HIIT consisted in 30-s all-out whole-body exercises interspaced with 30 s of active recovery. Training sessions were performed at home by means of videos with demonstration of exercises. Heart rate was monitored during sessions. Results WB-HIIT increased VO2peak (5%), VT1 (20%), leg lean mass (3%), dynamic (13%) and isometric strength (6%), and muscle endurance (28%; p < 0.05), while they did not improve in CTL. VO2peak increase was correlated (r = 0.56; p < 0.05) with the time spent above 80% of maximal heart rate during training sessions. Isometric strength increase was correlated with change in voluntary activation (r = 0.74; p < 0.01). Conclusion The home-based WB-HIIT induced concomitant cardiorespiratory fitness and neuromuscular improvements. The predominant effect was observed for aerobic capacity and muscle endurance which could improve exercise tolerance and reduce fatigability.
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Affiliation(s)
- Corentin Scoubeau
- Cardio-Pulmonary Exercise Laboratory, Faculty of Motor Sciences, Université libre de Bruxelles, Belgium
| | - Julie Carpentier
- Research Unit in Biometry and Exercise Nutrition, Faculty of Motor Sciences, Université libre de Bruxelles, Belgium
| | - Stéphane Baudry
- Laboratory of Applied Biology and Research Unit in Applied Neurophysiology, Faculty of Motor Sciences, ULB Neuroscience Institute, Université libre de Bruxelles, Belgium
| | - Vitalie Faoro
- Cardio-Pulmonary Exercise Laboratory, Faculty of Motor Sciences, Université libre de Bruxelles, Belgium
| | - Malgorzata Klass
- Research Unit in Biometry and Exercise Nutrition, Faculty of Motor Sciences, Université libre de Bruxelles, Belgium
- Laboratory of Applied Biology and Research Unit in Applied Neurophysiology, Faculty of Motor Sciences, ULB Neuroscience Institute, Université libre de Bruxelles, Belgium
- Corresponding author. Research Unit in Biometry and Exercise Nutrition, Faculty of Motor Sciences, Université libre de Bruxelles, Belgium.
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Uphill versus downhill high-intensity training effectiveness in preserving vascular function and exercise performance in runners who reduce their regular endurance training. SPORT SCIENCES FOR HEALTH 2023; 19:249-257. [PMID: 36567917 PMCID: PMC9765377 DOI: 10.1007/s11332-022-01029-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/10/2022] [Indexed: 12/24/2022]
Abstract
Purpose The COVID-19 restrictions have limited outdoor physical activities. High-intensity training (HIT) may be a valid indoor alternative. We tested whether an indoor HIT is effective in maintaining vascular function and exercise performance in runners who reduce their usual endurance training, and whether a downhill HIT is as effective as an uphill one for such purposes. Methods Sixteen runners performed the same 6-week HIT either uphill (UP, eight runners) or downhill (DOWN, eight runners). Eight runners continuing their usual endurance training acted as a control group (CON). The following data were collected before vs after our HIT: vascular conductance during rapid leg vasodilation to assess vasodilation capacity; V̇O2max through running incremental test to exhaustion; 2000 m running time; neuromuscular indexes related to lower-limb muscle strength. Results Both uphill and downhill HIT failed in maintaining the pre-HIT leg vasodilation capacity compared to CON, which was, however, blunted more after uphill than downhill HIT. V̇O2max and 2000 m time were similar after downhill HIT compared to CON, and augmented after uphill HIT compared to CON and DOWN. Indexes of lower-limb muscle strength were similar before vs after HIT and among groups. Conclusion Our HIT was ineffective in maintaining the pre-HIT leg vasodilation capacity compared to runners continuing their usual low-intensity endurance training, but did not lead to reductions in V̇O2max, 2000 m time performance, and indexes related to lower-limb muscle strength. Our data show an appealing potential for preserving exercise performance with low cardiorespiratory effort via downhill running.
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Tuakli-Wosornu YA, Kirby SL. Safeguarding Reimagined: Centering Athletes' Rights and Repositioning Para Sport to Chart a New Path. Front Psychol 2022; 13:815038. [PMID: 35592165 PMCID: PMC9113050 DOI: 10.3389/fpsyg.2022.815038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 02/08/2022] [Indexed: 11/13/2022] Open
Abstract
Objectives Para sport has much to teach the broader sports world about safeguarding and athlete protections. By centering athletes' human rights and underlining the rights-based philosophical underpinnings of the Paralympic Movement, we outline how sport can be safer to all players, coaches, and other participants. Methods We address global Human Rights conventions and their application to Para and non-disabled sport. Safe Sport is positioned as a matter of human rights. The nature of interpersonal violence that human beings experience within and outside sport is discussed. The intersectionality of vulnerable identities (related to gender, sexuality, disability, ethnicity, etc.) is reviewed in some detail. Results Rights violations in Para and non-disabled sport illustrate both individual and organizational vulnerabilities. Individual- and organizational-level drivers of abuse, as well as various modes and types of abuse observed in Para sport, are relevant in all sport settings and should be centered in global sport safeguarding work. The rights-based core of Para and similar sports movements, exemplifies this. Conclusion From a Para-informed vantage point, we issue a call to action, where interpersonal violence in sport is reduced by leveraging relevant elements of the Paralympic Movement. This call asks all sport participants to reject a purely capitalist approach to sport and follow a Para sport paradigm; which embodies human achievement (including sporting success), reflects human rights and inherent human dignity, and requires a higher standard of behaviour.
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Affiliation(s)
- Yetsa A Tuakli-Wosornu
- Department of Social and Behavioral Sciences, Yale School of Public Health, New Haven, CT, United States.,Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States
| | - Sandra L Kirby
- Faculty of Graduate Studies, University of Winnipeg, Winnipeg, MB, Canada
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