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Eon P, Jubeau M, Cattagni T. Post-activation potentiation after isometric contractions is strongly related to contraction intensity despite the similar torque-time integral. Exp Physiol 2024. [PMID: 38595307 DOI: 10.1113/ep091700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/25/2024] [Indexed: 04/11/2024]
Abstract
Post-activation potentiation (PAP) is defined as an enhanced contractile response of a muscle following its own contractile activity and is influenced by the intensity and duration of the conditioning contraction. The aim of this study was to determine if the combination of intensity and duration, that is, torque-time integral (TTI) is a determinant of PAP amplitude. We compared PAP amplitude following low-to-maximal voluntary conditioning contraction intensities with and without similar TTI in the knee extensors. Twelve healthy males completed two experimental sessions. Femoral nerve stimulation was applied to evoke single twitches on the relaxed quadriceps before and after isometric conditioning contractions of knee extensors. In one session, participants performed conditioning contractions without similar TTI (6 s at 100, 80, 60, 40 and 20% maximal voluntary contraction (MVC)), while they performed conditioning contractions with similar TTI in the other session (6 s at 100%, 7.5 s at 80%, 10 s at 60%, 15 s at 40%, and 30 s at 20% MVC). In both sessions, PAP amplitude was related to conditioning contraction intensity. The higher the conditioning contraction intensity with or without similar TTI, the higher PAP. Significant correlations were found (i) between PAP and conditioning contraction intensity with (r2 = 0.70; P < 0.001) or without similar TTI (r2 = 0.64; P < 0.001), and (ii) between PAP with and without similar TTI (r2 = 0.82; P < 0.001). The results provide evidence that TTI has a minor influence on PAP in the knee extensors. This suggests that to optimize the effect of PAP, it is more relevant to control the intensity of the contraction rather than the TTI.
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Affiliation(s)
- Pauline Eon
- Nantes Université, Movement - Interactions - Performance, MIP, UR 4334, Nantes, France
- Laboratory Culture Sport Health Society (UR 4660), Sport and Performance Department, UFR STAPS, University of Bourgogne Franche-Comté, Besançon, France
| | - Marc Jubeau
- Nantes Université, Movement - Interactions - Performance, MIP, UR 4334, Nantes, France
| | - Thomas Cattagni
- Nantes Université, Movement - Interactions - Performance, MIP, UR 4334, Nantes, France
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Morin T, Souron R, Boulaouche I, Jubeau M, Nordez A, Lacourpaille L. Mild to moderate damage in knee extensor muscles accumulates after two bouts of maximal eccentric contractions. Eur J Appl Physiol 2023; 123:2723-2732. [PMID: 37351697 DOI: 10.1007/s00421-023-05257-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 06/10/2023] [Indexed: 06/24/2023]
Abstract
PURPOSE This study aimed to determine whether mild to moderate muscle damage accumulates on the knee extensors after two bouts of maximal eccentric contractions performed over two consecutive days. METHODS Thirty participants performed an initial bout of maximal eccentric contractions of knee extensors during the first day of the protocol (ECC1). Then, they were separated in two groups. The Experimental (EXP) group repeated the eccentric bout 24 h later (ECC2) while the Control (CON) group did not. Indirect markers of muscle damage (i.e., strength loss, muscle soreness, and shear modulus) were measured to quantify the amount of muscle damage and its time course. RESULTS Two days after the initial eccentric session, participants from EXP had a higher strength deficit (- 14.5 ± 10.6%) than CON (- 6.6 ± 8.7%) (P = 0.017, d = 0.9). Although both groups exhibited an increase in knee extensors shear modulus after ECC1, we found a significant increase in muscle shear modulus (+ 13.3 ± 22.7%; P < 0.01; d = 0.5) after ECC2 for the EXP group, despite the presence of mild to moderate muscle damage (i.e., strength deficit about 16%). CONCLUSION Although the markers of muscle damage used in the current study were indirect, they suggest that the repetition of two bouts of maximal eccentric contractions with 24 h apart induces additional muscle damage in the knee extensors in presence of mild to moderate muscle damage.
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Affiliation(s)
- Titouan Morin
- Laboratory Movement, Interactions, Performance, MIP (UR 4334), Nantes Université, 25 Bis Boulevard Guy Mollet, BP 72206, 44322, Nantes Cedex 3, France
| | - Robin Souron
- Laboratory Movement, Interactions, Performance, MIP (UR 4334), Nantes Université, 25 Bis Boulevard Guy Mollet, BP 72206, 44322, Nantes Cedex 3, France
| | - Ines Boulaouche
- Laboratory Movement, Interactions, Performance, MIP (UR 4334), Nantes Université, 25 Bis Boulevard Guy Mollet, BP 72206, 44322, Nantes Cedex 3, France
| | - Marc Jubeau
- Laboratory Movement, Interactions, Performance, MIP (UR 4334), Nantes Université, 25 Bis Boulevard Guy Mollet, BP 72206, 44322, Nantes Cedex 3, France
| | - Antoine Nordez
- Laboratory Movement, Interactions, Performance, MIP (UR 4334), Nantes Université, 25 Bis Boulevard Guy Mollet, BP 72206, 44322, Nantes Cedex 3, France
- Institut Universitaire de France (IUF), Paris, France
| | - Lilian Lacourpaille
- Laboratory Movement, Interactions, Performance, MIP (UR 4334), Nantes Université, 25 Bis Boulevard Guy Mollet, BP 72206, 44322, Nantes Cedex 3, France.
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Varesco G, Pageaux B, Cattagni T, Sarcher A, Martinent G, Doron J, Jubeau M. Fatigue in elite fencing: Effects of a simulated competition. Scand J Med Sci Sports 2023; 33:2250-2260. [PMID: 37574844 DOI: 10.1111/sms.14466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 06/25/2023] [Accepted: 08/01/2023] [Indexed: 08/15/2023]
Abstract
The fatigue induced by fencing remains scarcely investigated. We aimed to investigate both objective (neuromuscular performance fatigability) and subjective (perceived fatigue, effort, and workload) manifestations of fatigue in elite fencers following a five-bout simulated competition. Changes in countermovement jump height, knee extensors maximal isometric torque, rate of torque development, voluntary activation, and contractile response to muscular electrical stimulation were measured in 29 elite fencers [12 epee (6 women), 11 saber (5 women), and 6 foil]. Perceived fatigue and effort were evaluated with visual analog scales, and the perceived workload with the NASA Task Load Index scale. During the competition, maximal torque and rate of torque development decreased by 1.6% (p = 0.017) and 2.4% (p < 0.001) per bout, respectively. Perceived fatigue before each bout increased (12% per bout), with similar values observed at the end of all bouts (bout × period interaction: p < 0.001). Perceived effort increased during the bouts (10% per period, p < 0.001) and during the competition (3% per bout, p = 0.011). Perceived mental demand increased during the competition (2% per bout, p = 0.024). These results suggest that elite fencers needed to increase the allocation of mental rather than physical resources to the task to counterbalance the deleterious effect of fatigue on performance.
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Affiliation(s)
- Giorgio Varesco
- Nantes Université, Laboratory Movement - Interactions - Performance (MIP), UR4334, Nantes, France
| | - Benjamin Pageaux
- Université de Montréal, École de kinésiologie et des sciences de l'activité physique (EKSAP), Montréal, Canada
- Centre de recherche de l'Institut universitaire de gériatrie de Montréal (CRIUGM), Montréal, Canada
- Centre interdisciplinaire de recherche sur le cerveau et l'apprentissage (CIRCA), Montréal, Canada
| | - Thomas Cattagni
- Nantes Université, Laboratory Movement - Interactions - Performance (MIP), UR4334, Nantes, France
| | - Aurélie Sarcher
- Nantes Université, Laboratory Movement - Interactions - Performance (MIP), UR4334, Nantes, France
| | - Guillaume Martinent
- Université Claude Bernard Lyon 1, Univ Lyon, Laboratory on Vulnerabilities and Innovation in Sport (LVIS), EA 7428, Lyon, France
| | - Julie Doron
- Nantes Université, Laboratory Movement - Interactions - Performance (MIP), UR4334, Nantes, France
| | - Marc Jubeau
- Nantes Université, Laboratory Movement - Interactions - Performance (MIP), UR4334, Nantes, France
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Poignard M, Guilhem G, Jubeau M, Martin E, Giol T, Montalvan B, Bieuzen F. Cold-water immersion and whole-body cryotherapy attenuate muscle soreness during 3 days of match-like tennis protocol. Eur J Appl Physiol 2023; 123:1895-1909. [PMID: 37088821 DOI: 10.1007/s00421-023-05190-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 03/27/2023] [Indexed: 04/25/2023]
Abstract
PURPOSE This study aimed to investigate the effect of whole-body cryotherapy (WBC), cold-water immersion (CWI) and passive recovery (PAS) on tennis recovery. METHODS Thirteen competitive male tennis players completed three consecutive match-like tennis protocols, followed by recovery (WBC, CWI, PAS) in a crossover design. Five tennis drills and serves were performed using a ball machine to standardize the fatiguing protocol. Maximal voluntary contraction (MVC) peak torque, creatine kinase activity (CK), muscle soreness, ball accuracy and velocity together with voluntary activation, low- and high-frequency torque and EMG activity were recorded before each protocol and 24 h following the third protocol. RESULTS MVC peak torque (- 7.7 ± 11.3%; p = 0.001) and the high- to low-frequency torque ratio (- 10.0 ± 25.8%; p < 0.05) decreased on Day 1 but returned to baseline on Day 2, Day 3 and Day 4 (p = 0.052, all p > 0.06). The CK activity slightly increased from 161.0 ± 100.2 to 226.0 ± 106.7 UA L-1 on Day 1 (p = 0.001) and stayed at this level (p = 0.016) across days with no differences between recovery interventions. Muscle soreness increased across days with PAS recovery (p = 0.005), while no main effect of time was neither observed with WBC nor CWI (all p > 0.292). The technical performance was maintained across protocols with WBC and PAS, while it increased for CWI on Day 3 vs Day 1 (p = 0.017). CONCLUSION Our 1.5-h tennis protocol led to mild muscle damage, though neither the neuromuscular function nor the tennis performance was altered due to accumulated workload induced by consecutive tennis protocols. The muscle soreness resulting from tennis protocols was similarly alleviated by both CWI and WBC. TRIAL REGISTRATION IRB No. 2017-A02255-48, 12/05/2017.
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Affiliation(s)
- Mathilde Poignard
- French Institute of Sport (INSEP), Laboratory Sport, Expertise and Performance (EA 7370), 11 Avenue du Tremblay, 75012, Paris, France.
- French Tennis Federation, Paris, France.
| | - Gaël Guilhem
- French Institute of Sport (INSEP), Laboratory Sport, Expertise and Performance (EA 7370), 11 Avenue du Tremblay, 75012, Paris, France
| | - Marc Jubeau
- Nantes University, Movement-Interactions-Performance, MIP, UR 4334, 44000, Nantes, France
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Colard J, Jubeau M, Duclay J, Cattagni T. Regulation of primary afferent depolarization and homosynaptic post-activation depression during passive and active lengthening, shortening and isometric conditions. Eur J Appl Physiol 2023; 123:1257-1269. [PMID: 36781424 DOI: 10.1007/s00421-023-05147-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 01/26/2023] [Indexed: 02/15/2023]
Abstract
PURPOSE This study aimed to determine whether the modulation of primary afferent depolarization (PAD) and homosynaptic post-activation depression (HPAD) are involved in the lower efficacy of Ia-afferent-α-motoneuron transmission commonly observed during lengthening compared to isometric and shortening conditions. METHODS 15 healthy young individuals participated in two experimental sessions dedicated to measurement in passive and active muscle states, respectively. In each session, PAD, HPAD and the efficacy of Ia-afferent-α-motoneuron transmission were evaluated during lengthening, shortening and isometric conditions. PAD was evaluated with D1 inhibition technique. Posterior tibial nerve stimulation was used to study HPAD and the efficacy of the Ia-afferent-α-motoneuron transmission through the recording of the soleus Hoffmann reflex (H reflex). RESULTS PAD was increased in lengthening than shortening (11.2%) and isometric (12.3%) conditions regardless of muscle state (P < 0.001). HPAD was increased in lengthening than shortening (5.1%) and isometric (4.2%) conditions in the passive muscle state (P < 0.05), while no difference was observed in the active muscle state. H reflex was lower in lengthening than shortening (- 13.2%) and isometric (- 9.4%) conditions in both muscle states (P < 0.001). CONCLUSION These results highlight the specific regulation of PAD and HPAD during lengthening conditions. However, the differences observed during passive lengthening compared to shortening and isometric conditions seem to result from an increase in Ia-afferent discharge, while the variations highlighted during active lengthening might come from polysynaptic descending pathways involving supraspinal centres that could regulate PAD mechanism.
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Affiliation(s)
- Julian Colard
- Nantes University, Movement-Interactions-Performance, MIP, 25 Bis Boulevard Guy Mollet-BP 72206, UR 4334, 44322, Nantes, France
| | - Marc Jubeau
- Nantes University, Movement-Interactions-Performance, MIP, 25 Bis Boulevard Guy Mollet-BP 72206, UR 4334, 44322, Nantes, France.
| | - Julien Duclay
- Toulouse NeuroImaging Center, Université de Toulouse, Inserm, UPS, Toulouse, France
| | - Thomas Cattagni
- Nantes University, Movement-Interactions-Performance, MIP, 25 Bis Boulevard Guy Mollet-BP 72206, UR 4334, 44322, Nantes, France
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Chartogne M, Rahmani A, Nicolon L, Jubeau M, Morel B. Neuromuscular fatigability amplitude and aetiology are interrelated across muscles. Exp Physiol 2020; 105:1758-1766. [PMID: 32822076 DOI: 10.1113/ep088682] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 08/18/2020] [Indexed: 12/19/2022]
Abstract
NEW FINDINGS What is the central question of this study? Is neuromuscular fatigability interrelated between different muscle groups from the same individual during isometric all-out exercise? What is the main finding and its importance? Although the average decrease can vary between muscles, an individual demonstrates interrelated fatigability aetiology regardless of the muscle group tested. The inter-individual variability provides evidence of different profiles common between muscles, which can be regarded as an individual characteristic. ABSTRACT Neuromuscular fatigability is commonly attributed to central and peripheral origins. However, there is strong evidence of interactions between these two mechanisms. According to the idea that peripheral fatigability might be centrally regulated, one can hypothesize that neuromuscular fatigability would be correlated between different muscle groups at the individual level. Thirty-two healthy participants (16 women and 16 men) completed two 5 min fatiguing exercises [60 isometric maximal voluntary contractions (MVCs)] with finger flexors (FFs) and ankle plantar flexors (PFs) in two randomized sessions. Neuromuscular testing was conducted before, during (every six MVCs) and directly after the fatigue procedure. The force asymptote (FA ) was calculated as the asymptote of the force-time relationship. Changes (post- vs. pre-fatigue) in the exercise-evoked force (ΔDb100 ), voluntary activation (ΔVA) and central activation ratio (∆CAR) were also investigated. Significant correlations were found between FFs and PFs for FA , ΔDb100 and ΔVA (r = 0.65, r = 0.63 and r = 0.50, respectively). A significant negative correlation between ∆CAR and ∆Db100 was evidenced for both PFs (r = -0.82) and FFs (r = -0.57). Neuromuscular fatigability is correlated between different muscle groups at the individual level. The results support the idea that a restrained motor drive prevents large peripheral perturbations and that individuals exhibit correlated fatigability aetiology regardless of the muscle group tested. Widely different central/peripheral profiles can be found amongst individuals, and a part of the fatigability aetiology can be regarded as an individual characteristic.
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Affiliation(s)
- Martin Chartogne
- Movement, Interactions, Performance Laboratory, Le Mans University, Le Mans, France
| | - Abderrahmane Rahmani
- Movement, Interactions, Performance Laboratory, Le Mans University, Le Mans, France
| | - Lucie Nicolon
- Movement, Interactions, Performance Laboratory, Le Mans University, Le Mans, France
| | - Marc Jubeau
- Movement, Interactions, Performance Laboratory, Nantes University, Nantes, France
| | - Baptiste Morel
- Laboratoire Interuniversitaire de Biologie de la Motricité, Université Savoie Mont Blanc, Chambéry, France
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Jubeau M, Doguet V. Muscle length: A new feature to investigate neural control of lengthening contractions. Exp Physiol 2020; 105:930-931. [DOI: 10.1113/ep088455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 03/27/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Marc Jubeau
- University of NantesLaboratory ‘Movement, Interactions, Performance’ MIP, EA 4334 Nantes F‐44000 France
| | - Valentin Doguet
- University of NantesLaboratory ‘Movement, Interactions, Performance’ MIP, EA 4334 Nantes F‐44000 France
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Hucteau E, Jubeau M, Cornu C, Cattagni T. Is there an intermuscular relationship in voluntary activation capacities and contractile kinetics? Eur J Appl Physiol 2020; 120:513-526. [PMID: 31925519 DOI: 10.1007/s00421-019-04299-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 12/30/2019] [Indexed: 01/14/2023]
Abstract
PURPOSE The force-generating capacities of human skeletal muscles are interrelated, highlighting a common construct of limb strength. This study aimed to further determine whether there is an intermuscular relationship in maximal voluntary activation capacities and contractile kinetics of human muscles. METHODS Twenty-six young healthy individuals participated in this study. Isometric maximal voluntary contraction (MVC) torque, voluntary activation level (VAL), and doublet twitch contractile kinetics (contraction time and half-relaxation time) evoked by a paired supramaximal peripheral nerve stimulation at 100 Hz were obtained in elbow flexors, knee extensors, plantar flexors and dorsiflexors of the dominant limb. RESULTS Peak MVC torque had significant positive correlations between all muscle group pairs (all P values < 0.01). A significant positive correlation for VAL was found only between knee extensors and plantar flexors (r = 0.60, P < 0.01). There were no significant correlations between all muscle group pairs for doublet twitch contraction time and doublet twitch half-relaxation time. DISCUSSION These results show that there is a partial common construct of maximal voluntary activation capacities that only concerns muscle groups that have incomplete activation during MVC (i.e., knee extensors and plantar flexors). This suggests that the common construct of MVC strength between these two muscle groups is partly influenced by neural mechanisms. The lack of intermuscular relationship of contractile kinetics showed that there is no common construct of muscle contractile kinetics, as assessed in vivo by investigating the time-course of evoked doublet twitch contractions.
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Affiliation(s)
- Elyse Hucteau
- Laboratoire "Motricité, Interactions, Performance" EA 4334, Faculty of Sport Sciences, UFR STAPS, University of Nantes, 25 bis Boulevard Guy Mollet-BP 72206, 44 322, Nantes cedex 3, France
| | - Marc Jubeau
- Laboratoire "Motricité, Interactions, Performance" EA 4334, Faculty of Sport Sciences, UFR STAPS, University of Nantes, 25 bis Boulevard Guy Mollet-BP 72206, 44 322, Nantes cedex 3, France
| | - Christophe Cornu
- Laboratoire "Motricité, Interactions, Performance" EA 4334, Faculty of Sport Sciences, UFR STAPS, University of Nantes, 25 bis Boulevard Guy Mollet-BP 72206, 44 322, Nantes cedex 3, France
| | - Thomas Cattagni
- Laboratoire "Motricité, Interactions, Performance" EA 4334, Faculty of Sport Sciences, UFR STAPS, University of Nantes, 25 bis Boulevard Guy Mollet-BP 72206, 44 322, Nantes cedex 3, France.
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Le Mansec Y, Perez J, Rouault Q, Doron J, Jubeau M. Impaired Performance of the Smash Stroke in Badminton Induced by Muscle Fatigue. Int J Sports Physiol Perform 2020; 15:52-59. [PMID: 30958057 DOI: 10.1123/ijspp.2018-0697] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 03/11/2019] [Accepted: 04/02/2019] [Indexed: 11/18/2022]
Abstract
PURPOSE To evaluate the effects of muscle fatigue on badminton performance during a smash stroke. METHODS In total, 17 young, well-trained players completed 20 forehand smashes twice (prefatigue and postfatigue protocol), and both speed and precision of the strokes were measured. The fatigue protocol consisted of 10 series of 10 maximal countermovement jumps (3-s rest in between) followed by 8 lunges. Perception of effort and countermovement-jump performance during each series were also measured to assess fatigue. RESULTS Shuttlecock speed decreased moderately (-3.3%) but significantly after the fatigue protocol (P < .001, ηp2=.671). Precision significantly decreased after the fatigue protocol (-10.3%, P = .001, ηp2=.473). The decrease in precision was mainly due to an increased number of faults (P = .006, ηp2=.378, dz = 0.756) and to a decrease in accuracy (P = .066, ηp2=.195, dz = 0.478). CONCLUSION The present study showed that fatigue impairs performance during specific badminton skills. Moreover, by showing a slight decrease in speed and a large decrease in accuracy of the shuttlecock when fatigue is experienced, the present study suggested that, as previously observed in other racket sports, the speed of the missile appears to be the key factor used by the players to win the rally. Coaches and physical trainers should therefore develop interventions aiming to limit the negative impact of fatigue on badminton strokes.
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Doguet V, Nosaka K, Guével A, Ishimura K, Guilhem G, Jubeau M. Influence of fascicle strain and corticospinal excitability during eccentric contractions on force loss. Exp Physiol 2019; 104:1532-1543. [PMID: 31374136 DOI: 10.1113/ep087664] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 07/29/2019] [Indexed: 12/13/2022]
Abstract
NEW FINDINGS What is the central question of this study? Do neural and/or mechanical factors determine the extent of muscle damage induced by eccentric contractions? What is the main finding and its importance? The extent of muscle damage induced by eccentric contractions is related to both mechanical strain and corticospinal excitability measured at long muscle lengths during eccentric contractions. ABSTRACT In this study, we investigated whether the mechanical and neural characteristics of maximal voluntary eccentric contractions would determine the extent of change in postexercise maximal voluntary isometric contraction (MVC) torque and muscle soreness. Eleven men performed 10 sets of 15 isokinetic (45 deg s-1 ) maximal voluntary eccentric knee extensions. Knee-extension torque and vastus lateralis fascicle length were assessed at sets 1, 5 and 9. Vastus lateralis motor evoked potential, maximal M wave (MEP/M) and the cortical silent period (CSP) were measured at 75 and 100 deg of knee flexion (0 deg = full extension) during contractions and were normalized to MEP/M (MEP/Mecc/iso ) and CSP (CSPecc/iso ) recorded during isometric MVC at each angle. The MVC torque and muscle soreness of the knee extensors were assessed before, 24, 48 and 96 h after the eccentric contractions. The extent of relative decrease in MVC torque at 24 h postexercise (r2 = 0.38) and peak muscle soreness (r2 = 0.69) were correlated (P < 0.05) with MEP/Mecc/iso measured at 100 deg, but not at 75 deg. The average torque on the descending limb of the torque-angle relationship (r2 = 0.16), fascicle elongation (r2 = 0.18) and CSPecc/iso at both 75 (r2 = 0.00) and 100 deg (r2 = 0.02) were not significantly correlated with the relative decrease in MVC torque. The relative decrease in MVC torque was best predicted by a combination of mean torque on the descending limb, fascicle elongation and MEP/Mecc/iso (R2 = 0.93). It is concluded that the extent of muscle damage based on the reduction in MVC torque is determined by mechanical strain and corticospinal excitability at long muscle lengths during maximal voluntary eccentric contractions.
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Affiliation(s)
- Valentin Doguet
- Nantes Université, Movement-Interactions-Performance, MIP, EA 4334, F-44000, Nantes, France.,Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, 6027, Australia
| | - Kazunori Nosaka
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, 6027, Australia
| | - Arnaud Guével
- Nantes Université, Movement-Interactions-Performance, MIP, EA 4334, F-44000, Nantes, France
| | - Kazuhiro Ishimura
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, 6027, Australia
| | - Gaël Guilhem
- French Institute of Sport (INSEP), Research Department, Laboratory "Sport, Expertise and Performance", EA, 7370, Paris, France
| | - Marc Jubeau
- Nantes Université, Movement-Interactions-Performance, MIP, EA 4334, F-44000, Nantes, France
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Cattagni T, Harnie J, Jubeau M, Hucteau E, Couturier C, Mignardot JB, Deschamps T, Berrut G, Cornu C. Corrigendum to “Neural and muscular factors both contribute to plantar-flexor muscle weakness in older fallers” [Exp. Gerontol. 112 (2018) 127–134]. Exp Gerontol 2019; 115:165-166. [DOI: 10.1016/j.exger.2018.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cattagni T, Harnie J, Jubeau M, Hucteau E, Couturier C, Mignardot JB, Deschamps T, Berrut G, Cornu C. Neural and muscular factors both contribute to plantar-flexor muscle weakness in older fallers. Exp Gerontol 2018; 112:127-134. [DOI: 10.1016/j.exger.2018.09.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 09/12/2018] [Accepted: 09/17/2018] [Indexed: 11/16/2022]
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Doguet V, Nosaka K, Guével A, Jubeau M. Reply to the Letter to the Editor: Comments on Doguet et al. (2017) 'Muscle length effect on corticospinal excitability during maximal concentric, isometric and eccentric contractions of the knee extensors'. Exp Physiol 2018; 103:1437-1438. [PMID: 30063099 DOI: 10.1113/ep087248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 07/23/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Valentin Doguet
- Laboratory 'Movement, Interactions, Performance', EA 4334, Faculty of Sport Sciences, University of Nantes, Nantes, France.,Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Kazunori Nosaka
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Arnaud Guével
- Laboratory 'Movement, Interactions, Performance', EA 4334, Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Marc Jubeau
- Laboratory 'Movement, Interactions, Performance', EA 4334, Faculty of Sport Sciences, University of Nantes, Nantes, France
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Merlet AN, Cattagni T, Cornu C, Jubeau M. Effect of knee angle on neuromuscular assessment of plantar flexor muscles: A reliability study. PLoS One 2018; 13:e0195220. [PMID: 29596480 PMCID: PMC5875874 DOI: 10.1371/journal.pone.0195220] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 02/25/2018] [Indexed: 11/18/2022] Open
Abstract
INTRODUCTION This study aimed to determine the intra- and inter-session reliability of neuromuscular assessment of plantar flexor (PF) muscles at three knee angles. METHODS Twelve young adults were tested for three knee angles (90°, 30° and 0°) and at three time points separated by 1 hour (intra-session) and 7 days (inter-session). Electrical (H reflex, M wave) and mechanical (evoked and maximal voluntary torque, activation level) parameters were measured on the PF muscles. Intraclass correlation coefficients (ICC) and coefficients of variation were calculated to determine intra- and inter-session reliability. RESULTS The mechanical measurements presented excellent (ICC>0.75) intra- and inter-session reliabilities regardless of the knee angle considered. The reliability of electrical measurements was better for the 90° knee angle compared to the 0° and 30° angles. CONCLUSIONS Changes in the knee angle may influence the reliability of neuromuscular assessments, which indicates the importance of considering the knee angle to collect consistent outcomes on the PF muscles.
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Affiliation(s)
- Angèle N. Merlet
- Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Thomas Cattagni
- Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences, University of Nantes, Nantes, France
- Inserm Unit 1179, Team 3: Technologies and Innovative Therapies Applied to Neuromuscular diseases, UVSQ. CIC 805, Physiology-Functional Testing Ward, AP-HP, Raymond Poincaré Teaching Hospital, Garches, France
- * E-mail:
| | - Christophe Cornu
- Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Marc Jubeau
- Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences, University of Nantes, Nantes, France
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Affiliation(s)
- Yann Le Mansec
- Laboratoire Motricité, Interactions, Performance - EA4334, Faculté des Sciences du Sport, Université de Nantes, Nantes, France
| | - Benjamin Pageaux
- INSERM UMR1093-CAPS, UFR des Sciences du Sport, Université Bourgogne Franche-Comté, Dijon, France
| | - Antoine Nordez
- Laboratoire Motricité, Interactions, Performance - EA4334, Faculté des Sciences du Sport, Université de Nantes, Nantes, France
| | - Sylvain Dorel
- Laboratoire Motricité, Interactions, Performance - EA4334, Faculté des Sciences du Sport, Université de Nantes, Nantes, France
| | - Marc Jubeau
- Laboratoire Motricité, Interactions, Performance - EA4334, Faculté des Sciences du Sport, Université de Nantes, Nantes, France
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16
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Affiliation(s)
- Wei Lu
- Laboratory ‘Movement, Interactions, Performance’, Faculty of Sciences and Technologies, Le Mans University, Le Mans, France
| | - Sébastien Boyas
- Laboratory ‘Movement, Interactions, Performance’, Faculty of Sciences and Technologies, Le Mans University, Le Mans, France
| | - Marc Jubeau
- Laboratory ‘Movement, Interactions, Performance’, Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Abderrahmane Rahmani
- Laboratory ‘Movement, Interactions, Performance’, Faculty of Sciences and Technologies, Le Mans University, Le Mans, France
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Abstract
PURPOSE Prolonged cycling exercise performance in normoxia is limited because of both peripheral and central neuromuscular impairments. It has been reported that cerebral perturbations are greater during short-duration exercise in hypoxia compared with normoxia. The purpose of this study was to test the hypothesis that central deficits are accentuated in hypoxia compared with normoxia during prolonged (three bouts of 80 min separated by 25 min) whole-body exercise at the same relative intensity. METHODS Ten subjects performed two sessions consisting of three 80-min cycling bouts at 45% of their relative maximal aerobic power in normoxia and hypoxia (FiO2 = 0.12). Before exercise and after each bout, maximal voluntary force, voluntary activation assessed with nerve stimulation and transcranial magnetic stimulation, corticospinal excitability (motor evoked potential), intracortical inhibition (cortical silent period), and electrical (M-wave) and contractile (twitch and doublet peak forces) properties of the knee extensors were measured. Prefrontal and motor cortical oxygenation was also recorded during each cycling bout in both conditions. RESULTS A significant but similar force reduction (≈-22%) was observed at the end of exercise in normoxia and hypoxia. The modifications of voluntary activation assessed with transcranial magnetic stimulation and nerve stimulation, motor evoked potential, cortical silent period, and M-wave were also similar in both conditions. However, cerebral oxygenation was reduced in hypoxia compared with normoxia. CONCLUSION These findings show that when performed at the same relative low intensity, prolonged exercise does not induce greater supraspinal fatigue in hypoxia compared with normoxia. Despite lower absolute exercise intensities in hypoxia, reduced brain O2 availability might contribute to similar amounts of central fatigue compared with normoxia.
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Affiliation(s)
- Marc Jubeau
- 1Laboratory HP2, Grenoble Alpes University, Grenoble, FRANCE; 2INSERM U1042, Grenoble, FRANCE; 3Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes, Nantes, FRANCE; 4Inter-university Laboratory of Human Movement Biology, University Savoie Mont Blanc, Chambéry, FRANCE; 5Inter-university Laboratory of Human Movement Biology, University of Lyon, UJM-Saint-Etienne, Saint-Etienne, FRANCE; 6Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, CANADA; and 7EuroMov, University of Montpellier, FRANCE
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Doguet V, Nosaka K, Guével A, Thickbroom G, Ishimura K, Jubeau M. Muscle length effect on corticospinal excitability during maximal concentric, isometric and eccentric contractions of the knee extensors. Exp Physiol 2017; 102:1513-1523. [DOI: 10.1113/ep086480] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 08/09/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Valentin Doguet
- Laboratory ‘Movement, Interactions, Performance’, EA 4334, Faculty of Sport Sciences; University of Nantes; Nantes France
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences; Edith Cowan University; Joondalup Western Australia Australia
| | - Kazunori Nosaka
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences; Edith Cowan University; Joondalup Western Australia Australia
| | - Arnaud Guével
- Laboratory ‘Movement, Interactions, Performance’, EA 4334, Faculty of Sport Sciences; University of Nantes; Nantes France
| | - Gary Thickbroom
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences; Edith Cowan University; Joondalup Western Australia Australia
| | - Kazuhiro Ishimura
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences; Edith Cowan University; Joondalup Western Australia Australia
| | - Marc Jubeau
- Laboratory ‘Movement, Interactions, Performance’, EA 4334, Faculty of Sport Sciences; University of Nantes; Nantes France
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Abstract
This study aimed to compare the muscle activity of lower limbs across typical table tennis strokes. Fourteen high-level players participated in this study in which five typical strokes (backhand top, forehand top, forehand spin, forehand smash, flick) were analysed. Surface electromyography activity (EMG) of eight muscles was recorded (gluteus maximus, biceps femoris, vastus medialis, vastus lateralis, rectus femoris, gastrocnemius medialis, gastrocnemius lateralis, soleus) and normalised to the maximal activity measured during squat jump or isometric maximal voluntary contractions. The forehand spin, the forehand top and the forehand smash exhibited significant higher EMG amplitude when compared with other strokes. Both biceps femoris and gluteus maximus were strongly activated during the smash, forehand spin and forehand top (from 62.8 to 91.7% of maximal EMG activity). Both vastii and rectus femoris were moderately to strongly activated during the forehand spin (from 50.4 to 62.2% of maximal EMG activity) whereas gastrocnemii and soleus exhibited the highest level of activity during the smash (from 67.1 to 92.1% of maximal EMG activity). Our study demonstrates that offensive strokes, such as smash or forehand top, exhibit higher levels of activity than other strokes.
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Affiliation(s)
- Yann Le Mansec
- a Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences , University of Nantes , Nantes , France
| | - Sylvain Dorel
- a Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences , University of Nantes , Nantes , France
| | - François Hug
- a Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences , University of Nantes , Nantes , France
| | - Marc Jubeau
- a Laboratory Movement, Interactions, Performance, Faculty of Sport Sciences , University of Nantes , Nantes , France
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Doguet V, Nosaka K, Plautard M, Gross R, Guilhem G, Guével A, Jubeau M. Neuromuscular Changes and Damage after Isoload versus Isokinetic Eccentric Exercise. Med Sci Sports Exerc 2017; 48:2526-2535. [PMID: 27434079 DOI: 10.1249/mss.0000000000001042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE This study compared the effects of isoload (IL) and isokinetic (IK) knee extensor eccentric exercises on changes in muscle damage and neuromuscular parameters to test the hypothesis that the changes would be different after IL and IK exercises. METHODS Twenty-two young men were paired based on their strength and placed in the IL (N = 11) or the IK (N = 11) group. The IL group performed 15 sets of 10 eccentric contractions with a 150% of predetermined one-repetition maximum load. The IK group performed 15 sets of several maximal eccentric contractions matched set by set for the total amount of work and mean angular velocity with the IL group. Muscle damage markers (voluntary isometric peak torque, muscle soreness, and creatine kinase activity) and neuromuscular variables (e.g., voluntary activation, H-reflex, M-wave, and evoked torque) were measured before, immediately after, and 24, 48, 72, and 96 h postexercise. RESULTS Voluntary isometric peak torque decreased to the same extent (P = 0.94) in both groups immediately after (IL = -40.6% ± 13.8% vs IK = -42.4% ± 10.2%) to 96 h after the exercise (IL = -21.8% ± 28.5% vs IK = -26.7% ± 23.5%). Neither peak muscle soreness (IL = 48.1 ± 28.2 mm vs IK = 54.7 ± 28.9 mm, P = 0.57) nor creatine kinase activity (IL = 12,811 ± 22,654 U·L vs IK = 15,304 ± 24,739 U·L, P = 0.59) significantly differed between groups. H-reflex (IL = -23% vs IK = -35%) and M-wave (IL = -10% vs IK = -17%) significantly decreased immediately postexercise similarly between groups. CONCLUSION The changes in muscle damage and neuromuscular function after the exercise are similar between IL and IK, suggesting that resistance modality has little effects on acute muscle responses.
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Affiliation(s)
- Valentin Doguet
- 1Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes, Nantes, FRANCE; 2Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, AUSTRALIA; 3Department of Physical Medicine and Rehabilitation, Nantes University Hospital, Saint-Jacques Hospital, Nantes, FRANCE; and 4French Institute of Sport (INSEP), Research Department, Laboratory Sport, Expertise and Performance (EA 7370), Paris, FRANCE
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Le Mansec Y, Nordez A, Dorel S, Jubeau M. Reaction time can be measured during voluntary contractions with electrode array. Clin Physiol Funct Imaging 2017; 38:338-340. [PMID: 28795529 DOI: 10.1111/cpf.12455] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 07/04/2017] [Indexed: 12/21/2022]
Abstract
Reaction time (RT) is classically divided into premotor time (PMT) and electromechanical delay (EMD). However, the determination of the onset of electromyographic activity (EMG) during voluntary contraction remains questionable. In addition, the reliability of RT, PMT and EMD needs to be determined. Twelve participants performed two sessions of RT trials, separated by 5 min. RT was evaluated during voluntary isometric contractions of the elbow flexors, i.e., time between a light signal (stimulus) and the onset of the mechanical response. To assess EMD, an electrode array (64 channels) was used to accurately detect the onset of EMG activity. PMT represented the major part of the RT (~88%). Coefficients of variation were reasonably satisfactory for all parameters (range: 11·9-13·4%). The use of electrode array appears to be a relevant method to measure EMD. Moreover, sessions based on two trials are reliable enough to detect changes in RT components.
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Affiliation(s)
- Y Le Mansec
- Faculty of Sport Sciences, Laboratory "Movement, Interactions, Performance" (EA 4334), University of Nantes, Nantes, France
| | - A Nordez
- Faculty of Sport Sciences, Laboratory "Movement, Interactions, Performance" (EA 4334), University of Nantes, Nantes, France
| | - S Dorel
- Faculty of Sport Sciences, Laboratory "Movement, Interactions, Performance" (EA 4334), University of Nantes, Nantes, France
| | - M Jubeau
- Faculty of Sport Sciences, Laboratory "Movement, Interactions, Performance" (EA 4334), University of Nantes, Nantes, France
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Cattagni T, Harnie J, Jubeau M, Couturier C, Berrut G, Cornu C. POSTURAL MUSCLES WEAKNESS IN OLDER ADULTS WITH FALL HISTORY: A NEURAL OR A MECHANICAL DEFICIT? Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T. Cattagni
- Laboratory “Movement, Interactions, Performance” EA 4334, University of Nantes, NANTES, France,
| | - J. Harnie
- Laboratory “Movement, Interactions, Performance” EA 4334, University of Nantes, NANTES, France,
| | - M. Jubeau
- Laboratory “Movement, Interactions, Performance” EA 4334, University of Nantes, NANTES, France,
| | | | - G. Berrut
- University hospital of Nantes, Nantes, France
- Laboratory “Movement, Interactions, Performance” EA 4334, University of Nantes, NANTES, France,
| | - C. Cornu
- Laboratory “Movement, Interactions, Performance” EA 4334, University of Nantes, NANTES, France,
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Cattagni T, Merlet AN, Cornu C, Jubeau M. H-reflex and M-wave recordings: effect of pressure application to the stimulation electrode on the assessment of evoked potentials and subject's discomfort. Clin Physiol Funct Imaging 2017; 38:416-424. [PMID: 28444940 DOI: 10.1111/cpf.12431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 03/03/2017] [Indexed: 11/26/2022]
Abstract
This study aimed to compare the effect of different types of pressure applied to the stimulation electrode on assessing the efficiency of Ia-α-motoneuron transmission of the soleus muscle and the associated discomfort using electrical nerve stimulation. Twelve healthy young adults participated in three experimental sessions (one for each knee angle). The amplitudes of the maximal Hoffmann reflex (Hmax ) and motor potential (Mmax ) were recorded from the soleus muscle at 0°, 30° and 90° knee angles (0° full extension) through three pressure applications to the stimulation electrode: no pressure, pressure with manual application and pressure using adhesive tape. The soleus Hmax /Mmax were calculated to assess the efficiency of Ia-α-motoneuron transmission during varied knee angles and pressure application to the stimulation electrode. At the stimulation intensity evoking soleus Hmax and Mmax , subjects were asked to orally provide a value between 'no discomfort' (0) and 'worst possible discomfort' (10). The application of pressure on the stimulation electrode, particularly using adhesive tape, decreased both the stimulation intensity needed to evoke an electrophysiological response and the associated self-reported discomfort (P<0·05), while the Hmax /Mmax remained constant. At the stimulation intensity evoking Mmax , the electrical stimulation appeared to be more painful at 0° knee angle compared with 30° and 90° angles (P<0·01). To conclude, this study showed that a knee flexion and a pressure application to the stimulation electrode, especially using tape pressure, are recommended in the objective to reduce the patient/subjects' discomfort when eliciting evoked potentials on soleus muscle.
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Affiliation(s)
- Thomas Cattagni
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Angèle N Merlet
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Christophe Cornu
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Marc Jubeau
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes, Nantes, France
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Doguet V, Rivière V, Guével A, Guilhem G, Chauvet L, Jubeau M. Specific joint angle dependency of voluntary activation during eccentric knee extensions. Muscle Nerve 2016; 56:750-758. [PMID: 27997698 DOI: 10.1002/mus.25515] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 12/06/2016] [Accepted: 12/09/2016] [Indexed: 01/04/2023]
Abstract
INTRODUCTION This study compared voluntary activation during isometric, concentric, and eccentric maximal knee extensions at different joint angles. METHODS Fifteen participants performed isometric, concentric, and eccentric protocols (9 contractions each). For each protocol, the central activation ratio (CAR) was randomly measured at 50°, 75°, or 100° of knee joint angle (0° = full knee extension) using superimposed supramaximal paired nerve stimulations during contractions. RESULTS CAR increased between 50° and 100° during isometric (93.6 ± 3.1 vs. 98.5 ± 1.4%), concentric (92.4 ± 5.4 vs. 99.2 ± 1.2%), and eccentric (93.0 ± 3.5 vs. 96.6 ± 3.8%) contractions. CAR was lower during eccentric than both isometric and concentric contractions at 75° and 100°, but similar between contraction types at 50°. CONCLUSIONS The ability to activate muscle maximally is impaired during eccentric contractions compared with other contraction types at 75° and 100°, but not at 50°. Muscle Nerve 56: 750-758, 2017.
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Affiliation(s)
- Valentin Doguet
- Laboratory "Movement, Interactions, Performance" (EA 4334), 25 bis Boulevard Guy Mollet, Faculty of Sport Sciences, University of Nantes, 44322, Nantes, France
| | - Valentin Rivière
- Laboratory "Movement, Interactions, Performance" (EA 4334), 25 bis Boulevard Guy Mollet, Faculty of Sport Sciences, University of Nantes, 44322, Nantes, France
| | - Arnaud Guével
- Laboratory "Movement, Interactions, Performance" (EA 4334), 25 bis Boulevard Guy Mollet, Faculty of Sport Sciences, University of Nantes, 44322, Nantes, France
| | - Gaël Guilhem
- French National Institute of Sport (INSEP), Research Department, Laboratory Sport, Expertise and Performance (EA 7370), Paris, France
| | - Lucile Chauvet
- Laboratory "Movement, Interactions, Performance" (EA 4334), 25 bis Boulevard Guy Mollet, Faculty of Sport Sciences, University of Nantes, 44322, Nantes, France
| | - Marc Jubeau
- Laboratory "Movement, Interactions, Performance" (EA 4334), 25 bis Boulevard Guy Mollet, Faculty of Sport Sciences, University of Nantes, 44322, Nantes, France
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Jubeau M, Gondin J. Methodological considerations for investigating the influence of neuromuscular electrical stimulation on pH heterogeneity. Magn Reson Med 2016; 77:465. [PMID: 27928833 DOI: 10.1002/mrm.26511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 09/26/2016] [Accepted: 09/26/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Marc Jubeau
- Laboratoire "Motricité, Interactions, Performance," Faculté des Sciences du Sport, Nantes, France
| | - Julien Gondin
- Aix-Marseille Université, CNRS, CRMBM UMR 7339, Marseille, France.,Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Villeurbanne, France.,CNRS UMR 5310, Villeurbanne, France.,INSERM U1217, Villeurbanne, France
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26
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Fouré A, Duhamel G, Vilmen C, Bendahan D, Jubeau M, Gondin J. Fast measurement of the quadriceps femoris muscle transverse relaxation time at high magnetic field using segmented echo-planar imaging. J Magn Reson Imaging 2016; 45:356-368. [DOI: 10.1002/jmri.25355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 06/09/2016] [Indexed: 11/06/2022] Open
Affiliation(s)
- Alexandre Fouré
- Aix-Marseille Université, CNRS, CRMBM UMR; 7339 Marseille France
| | | | | | - David Bendahan
- Aix-Marseille Université, CNRS, CRMBM UMR; 7339 Marseille France
| | - Marc Jubeau
- Aix-Marseille Université, CNRS, CRMBM UMR; 7339 Marseille France
- Université de Nantes, Laboratoire “Motricité, Interactions, Performance,”; Nantes France
| | - Julien Gondin
- Aix-Marseille Université, CNRS, CRMBM UMR; 7339 Marseille France
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Guilhem G, Doguet V, Hauraix H, Lacourpaille L, Jubeau M, Nordez A, Dorel S. Muscle force loss and soreness subsequent to maximal eccentric contractions depend on the amount of fascicle strain in vivo. Acta Physiol (Oxf) 2016; 217:152-63. [PMID: 26786411 DOI: 10.1111/apha.12654] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 01/06/2016] [Accepted: 01/09/2016] [Indexed: 11/30/2022]
Abstract
AIM Defining the origins of muscle injury has important rehabilitation and exercise applications. However, current knowledge of muscle damage mechanics in human remains unclear in vivo. This study aimed to determine the relationships between muscle-tendon unit mechanics during maximal eccentric contractions and the extent of subsequent functional impairments induced by muscle damage. METHODS The length of the muscle-tendon unit, fascicles and tendinous tissues was continuously measured on the gastrocnemius medialis using ultrasonography, in time with torque, during 10 sets of 30 maximal eccentric contractions of plantar flexors at 45°s(-1) , in seventeen participants. RESULTS Muscle-tendon unit, fascicles and tendinous tissues were stretched up to 4.44 ± 0.33 cm, 2.31 ± 0.64 cm and 1.92 ± 0.61 cm respectively. Fascicle stretch length, lengthening amplitude and negative fascicle work beyond slack length were significantly correlated with the force decrease 48 h post-exercise (r = 0.51, 0.47 and 0.68, respectively; P < 0.05). CONCLUSIONS This study demonstrates that the strain applied to human muscle fibres during eccentric contractions strongly influences the magnitude of muscle damage in vivo. Achilles tendon compliance decreases the amount of strain, while architectural gear ratio may moderately contribute to attenuating muscle fascicle lengthening and hence muscle damage. Further studies are necessary to explore the impact of various types of task to fully understand the contribution of muscle-tendon interactions during active lengthening to muscle damage.
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Affiliation(s)
- G. Guilhem
- Laboratory Sport, Expertise and Performance (EA 7370); Research Department; French National Institute of Sport (INSEP); Paris France
| | - V. Doguet
- Laboratory ‘Movement, Interactions, Performance’ (EA 4334); Faculty of Sport Sciences; University of Nantes; Nantes France
| | - H. Hauraix
- Laboratory ‘Movement, Interactions, Performance’ (EA 4334); Faculty of Sport Sciences; University of Nantes; Nantes France
| | - L. Lacourpaille
- Laboratory Sport, Expertise and Performance (EA 7370); Research Department; French National Institute of Sport (INSEP); Paris France
- Laboratory ‘Movement, Interactions, Performance’ (EA 4334); Faculty of Sport Sciences; University of Nantes; Nantes France
| | - M. Jubeau
- Laboratory ‘Movement, Interactions, Performance’ (EA 4334); Faculty of Sport Sciences; University of Nantes; Nantes France
| | - A. Nordez
- Laboratory ‘Movement, Interactions, Performance’ (EA 4334); Faculty of Sport Sciences; University of Nantes; Nantes France
| | - S. Dorel
- Laboratory ‘Movement, Interactions, Performance’ (EA 4334); Faculty of Sport Sciences; University of Nantes; Nantes France
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Doguet V, Jubeau M, Dorel S, Couturier A, Lacourpaille L, Guével A, Guilhem G. Time-Course of Neuromuscular Changes during and after Maximal Eccentric Contractions. Front Physiol 2016; 7:137. [PMID: 27148075 PMCID: PMC4834740 DOI: 10.3389/fphys.2016.00137] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 03/29/2016] [Indexed: 11/13/2022] Open
Abstract
This study tested the relationship between the magnitude of muscle damage and both central and peripheral modulations during and after eccentric contractions of plantar flexors. Eleven participants performed 10 sets of 30 maximal eccentric contractions of the plantar flexors at 45°·s−1. Maximal voluntary torque, evoked torque (peripheral component) and voluntary activation (central component) were assessed before, during, immediately after (POST) and 48 h after (48 h) the eccentric exercise. Voluntary eccentric torque progressively decreased (up to −36%) concomitantly to a significant alteration of evoked torque (up to −34%) and voluntary activation (up to −13%) during the exercise. Voluntary isometric torque (−48 ± 7%), evoked torque (−41 ± 14%) and voluntary activation (−13 ± 11%) decreased at POST, but only voluntary isometric torque (−19 ± 6%) and evoked torque (−10 ± 18%) remained depressed at 48 h. Neither changes in voluntary activation nor evoked torque during the exercise were related to the magnitude of muscle damage markers, but the evoked torque decrement at 48 h was significantly correlated with the changes in voluntary activation (r = −0.71) and evoked torque (r = 0.77) at POST. Our findings show that neuromuscular responses observed during eccentric contractions were not associated with muscle damage. Conversely, central and peripheral impairments observed immediately after the exercise reflect the long-lasting reduction in force-generating capacity.
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Affiliation(s)
- Valentin Doguet
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes Nantes, France
| | - Marc Jubeau
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes Nantes, France
| | - Sylvain Dorel
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes Nantes, France
| | - Antoine Couturier
- Laboratory Sport, Expertise and Performance (EA 7370), Research Department, French Institute of Sport (INSEP) Paris, France
| | - Lilian Lacourpaille
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of NantesNantes, France; Laboratory Sport, Expertise and Performance (EA 7370), Research Department, French Institute of Sport (INSEP)Paris, France
| | - Arnaud Guével
- Laboratory "Movement, Interactions, Performance" (EA 4334), Faculty of Sport Sciences, University of Nantes Nantes, France
| | - Gaël Guilhem
- Laboratory Sport, Expertise and Performance (EA 7370), Research Department, French Institute of Sport (INSEP) Paris, France
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Deschamps T, Magnard J, Jubeau M, Hug F, Tucker K. Altered force-generating capacity is well-perceived regardless of the pain presence. J Exp Psychol Hum Percept Perform 2016; 42:1363-71. [PMID: 27123675 DOI: 10.1037/xhp0000232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
An inability to perceive changes in action capabilities may result in increased risk of injury and/or reduced performance. We investigated whether the perception of ability to perform a maximal single-leg hop was updated when the actual ability to perform the task was reduced due to experimentally altered force-generating capacity and associated pain. Twenty-five healthy volunteers performed a series of maximal isometric voluntary knee extensions (MVC), performance estimates and actual performances of a maximal single-leg hop. The motor tasks were completed for each leg, before (t0_pre), and immediately (t0_post), 48 hr (t+48hr) and 1 month (t+1month) after, a neuromuscular electrical stimulation (NMES) protocol was used to decrease the force generating capacity of the quadriceps muscle of 1 leg. MVC torque decreased by ∼30% after the NMES protocol for the stimulated leg at t0_post and t+48hr (p < .001). This reduction was associated with a significant decrease in estimation of performance and actual performance of the maximal single-leg hop at t0_post and t+48hr for the test leg (p < .001). The reduction in performance ability was associated with low-level pain immediately after NMES, and moderate pain and an increase in the belief that everyday motor tasks would be harmful 48 hours after NMES. Participants accurately estimated their performance capabilities during each testing period. This study provides a critical step toward understanding the potential for decreased force-generating capacity and muscle pain to modify the relationship between motor performance and perceived abilities.
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Affiliation(s)
| | | | - Marc Jubeau
- Laboratory MIP (EA 4334), University of Nantes
| | | | - Kylie Tucker
- School of Biomedical Sciences, The University of Queensland
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Abstract
BACKGROUND This study aimed to determine the neuromuscular fatigue (central versus peripheral mechanisms) as well as the game characteristics and physical demand induced by a simulated table tennis competition. METHODS Fourteen national table tennis players participated in this study, in which neuromuscular tests (i.e., maximal voluntary contractions, voluntary activation and twitch properties of the knee extensor muscles) were performed before and immediately after four games of five sets of table tennis to assess both the magnitude of fatigue and its origin. The game characteristics and the physical demand of the players (low-, moderate- and high-intensity actions) were identified using time motion analysis methodology. RESULTS A significant decrease (-12.5±9.0%) of force was observed at the end of the competition. Voluntary activation significantly decreased at the end of the competition, from 89.4±3.5% to 81.6±7.3%. Electrical and contractile properties were also significantly reduced after the first game (approximately 15% for both the potentiated doublet and M-wave amplitude) and did not decrease thereafter. Moreover, low and moderate actions represented an important portion (84.3±4.7%) of the actions performed by the players, whereas high intensity actions represented 15.7±4.7%. CONCLUSIONS This study demonstrated that a simulated table tennis competition induced significant fatigue due to central and peripheral alterations. Our study also demonstrated that a large proportion of the actions performed by the players during table tennis can be considered low to moderate intensity actions.
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Affiliation(s)
- Yann LE Mansec
- Laboratory "Movement, Interactions, Performance" (EA4334), Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Carole Seve
- Laboratory "Movement, Interactions, Performance" (EA4334), Faculty of Sport Sciences, University of Nantes, Nantes, France
| | - Marc Jubeau
- Laboratory "Movement, Interactions, Performance" (EA4334), Faculty of Sport Sciences, University of Nantes, Nantes, France -
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Ateş F, Hug F, Bouillard K, Jubeau M, Frappart T, Couade M, Bercoff J, Nordez A. Muscle shear elastic modulus is linearly related to muscle torque over the entire range of isometric contraction intensity. J Electromyogr Kinesiol 2015; 25:703-8. [DOI: 10.1016/j.jelekin.2015.02.005] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 12/20/2014] [Accepted: 02/05/2015] [Indexed: 02/01/2023] Open
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Fouré A, Nosaka K, Wegrzyk J, Duhamel G, Le Troter A, Boudinet H, Mattei JP, Vilmen C, Jubeau M, Bendahan D, Gondin J. Time course of central and peripheral alterations after isometric neuromuscular electrical stimulation-induced muscle damage. PLoS One 2014; 9:e107298. [PMID: 25215511 PMCID: PMC4162582 DOI: 10.1371/journal.pone.0107298] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 08/08/2014] [Indexed: 11/18/2022] Open
Abstract
Isometric contractions induced by neuromuscular electrostimulation (NMES) have been shown to result in a prolonged force decrease but the time course of the potential central and peripheral factors have never been investigated. This study examined the specific time course of central and peripheral factors after isometric NMES-induced muscle damage. Twenty-five young healthy men were subjected to an NMES exercise consisting of 40 contractions for both legs. Changes in maximal voluntary contraction force of the knee extensors (MVC), peak evoked force during double stimulations at 10 Hz (Db10) and 100 Hz (Db100), its ratio (10∶100), voluntary activation, muscle soreness and plasma creatine kinase activity were assessed before, immediately after and throughout four days after NMES session. Changes in knee extensors volume and T2 relaxation time were also assessed at two (D2) and four (D4) days post-exercise. MVC decreased by 29% immediately after NMES session and was still 19% lower than the baseline value at D4. The decrease in Db10 was higher than in Db100 immediately and one day post-exercise resulting in a decrease (−12%) in the 10∶100 ratio. On the contrary, voluntary activation significantly decreased at D2 (−5%) and was still depressed at D4 (−5%). Muscle soreness and plasma creatine kinase activity increased after NMES and peaked at D2 and D4, respectively. T2 was also increased at D2 (6%) and D4 (9%). Additionally, changes in MVC and peripheral factors (e.g., Db100) were correlated on the full recovery period, while a significant correlation was found between changes in MVC and VA only from D2 to D4. The decrease in MVC recorded immediately after the NMES session was mainly due to peripheral changes while both central and peripheral contributions were involved in the prolonged force reduction. Interestingly, the chronological events differ from what has been reported so far for voluntary exercise-induced muscle damage.
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Affiliation(s)
- Alexandre Fouré
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
- * E-mail:
| | - Kazunori Nosaka
- Edith Cowan University, School of Exercise and Health Sciences, WA 6027, Joondalup, Australia
| | - Jennifer Wegrzyk
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
| | - Guillaume Duhamel
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
| | - Arnaud Le Troter
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
| | - Hélène Boudinet
- APHM, La Timone Hospital, CEMEREM, Imaging Center, Marseille, France
| | - Jean-Pierre Mattei
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
- APHM, La Conception Hospital, Department of Rheumatology, Marseille, France
| | - Christophe Vilmen
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
| | - Marc Jubeau
- University of Nantes, Laboratory “Motricité, Interactions, Performance” (EA 4334), UFR STAPS, Nantes, France
| | - David Bendahan
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
| | - Julien Gondin
- Aix-Marseille University, CNRS, CRMBM UMR CNRS 7339, Marseille, France
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Jubeau M, Rupp T, Perrey S, Temesi J, Wuyam B, Levy P, Verges S, Millet GY. Changes in voluntary activation assessed by transcranial magnetic stimulation during prolonged cycling exercise. PLoS One 2014; 9:e89157. [PMID: 24586559 PMCID: PMC3931682 DOI: 10.1371/journal.pone.0089157] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 01/15/2014] [Indexed: 01/13/2023] Open
Abstract
Maximal central motor drive is known to decrease during prolonged exercise although it remains to be determined whether a supraspinal deficit exists, and if so, when it appears. The purpose of this study was to evaluate corticospinal excitability and muscle voluntary activation before, during and after a 4-h cycling exercise. Ten healthy subjects performed three 80-min bouts on an ergocycle at 45% of their maximal aerobic power. Before exercise and immediately after each bout, neuromuscular function was evaluated in the quadriceps femoris muscles under isometric conditions. Transcranial magnetic stimulation was used to assess voluntary activation at the cortical level (VATMS), corticospinal excitability via motor-evoked potential (MEP) and intracortical inhibition by cortical silent period (CSP). Electrical stimulation of the femoral nerve was used to measure voluntary activation at the peripheral level (VAFNES) and muscle contractile properties. Maximal voluntary force was significantly reduced after the first bout (13±9%, P<0.01) and was further decreased (25±11%, P<0.001) at the end of exercise. CSP remained unchanged throughout the protocol. Rectus femoris and vastus lateralis but not vastus medialis MEP normalized to maximal M-wave amplitude significantly increased during cycling. Finally, significant decreases in both VATMS and VAFNES (∼8%, P<0.05 and ∼14%, P<0.001 post-exercise, respectively) were observed. In conclusion, reductions in VAFNES after a prolonged cycling exercise are partly explained by a deficit at the cortical level accompanied by increased corticospinal excitability and unchanged intracortical inhibition. When comparing the present results with the literature, this study highlights that changes at the cortical and/or motoneuronal levels depend not only on the type of exercise (single-joint vs. whole-body) but also on exercise intensity and/or duration.
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Affiliation(s)
- Marc Jubeau
- INSERM U1042, Grenoble, France
- Université de Lyon, Saint-Etienne, France
- MIP, Nantes, France
| | - Thomas Rupp
- INSERM U1042, Grenoble, France
- Laboratoire HP2, Grenoble Alpes University, Grenoble, France
| | - Stephane Perrey
- Movement To Health (M2H), Montpellier-I University, Euromov, France
| | | | - Bernard Wuyam
- INSERM U1042, Grenoble, France
- Laboratoire HP2, Grenoble Alpes University, Grenoble, France
| | - Patrick Levy
- INSERM U1042, Grenoble, France
- Laboratoire HP2, Grenoble Alpes University, Grenoble, France
| | - Samuel Verges
- INSERM U1042, Grenoble, France
- Laboratoire HP2, Grenoble Alpes University, Grenoble, France
| | - Guillaume Y. Millet
- INSERM U1042, Grenoble, France
- Université de Lyon, Saint-Etienne, France
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
- * E-mail:
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Bouillard K, Jubeau M, Nordez A, Hug F. Effect of vastus lateralis fatigue on load sharing between quadriceps femoris muscles during isometric knee extensions. J Neurophysiol 2014; 111:768-76. [DOI: 10.1152/jn.00595.2013] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The present study aimed to investigate the effects of selective fatigue (i.e., one muscle of the quadriceps) on load sharing strategies during submaximal knee extensions. Shear wave elastography was used to measure muscle shear elastic modulus, as this is considered to be an index of individual muscle force. Sixteen participants attended two experimental sessions that each involved six 10-s knee extensions at 20% of maximal voluntary contraction (MVC) followed by a sustained submaximal isometric knee extension at 20% of MVC, until task failure (Tlim). Between the 10-s contractions and Tlim, participants were required to rest (5 min) for the control session or underwent 5 min of electromyostimulation (EMS) on vastus lateralis (EMS session). Compared with the control session, vastus lateralis shear elastic modulus values were significantly lower after EMS considering both the start of Tlim (54.6 ± 11.8 vs. 68.4 ± 19.2 kPa; P = 0.011) and the entire Tlim contraction (59.0 ± 14.0 vs. 74.4 ± 20.3 kPa; P = 0.019). However, no significant differences were observed for the other recorded muscles (vastus medialis and rectus femoris; both P = 1), i.e., different patterns of changes were found between participants. In conclusion, this study demonstrates that prefatiguing a single agonist muscle does not lead to a consistent redistribution of load sharing among the quadriceps muscles between individuals. These results suggest that the central nervous system does not use a common principle among individuals to control load sharing when neuromuscular fatigue occurs.
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Affiliation(s)
- Killian Bouillard
- Laboratory “Motricité, Interactions, Performance” (EA 4334), UFR STAPS, University of Nantes, Nantes, France; and
| | - Marc Jubeau
- Laboratory “Motricité, Interactions, Performance” (EA 4334), UFR STAPS, University of Nantes, Nantes, France; and
| | - Antoine Nordez
- Laboratory “Motricité, Interactions, Performance” (EA 4334), UFR STAPS, University of Nantes, Nantes, France; and
| | - François Hug
- Laboratory “Motricité, Interactions, Performance” (EA 4334), UFR STAPS, University of Nantes, Nantes, France; and
- NHMRC Centre of Clinical Research Excellence in Spinal Pain, Injury and Health, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia
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Rupp T, Leti T, Jubeau M, Millet GY, Bricout VA, Levy P, Wuyam B, Perrey S, Verges S. Tissue deoxygenation kinetics induced by prolonged hypoxic exposure in healthy humans at rest. J Biomed Opt 2013; 18:095002. [PMID: 24064948 DOI: 10.1117/1.jbo.18.9.095002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 09/04/2013] [Indexed: 06/02/2023]
Abstract
This study aimed to investigate the effects of sustained hypoxic exposure on cerebral and muscle oxygenation and cardiorespiratory function at rest. Eleven healthy subjects inhaled a normobaric hypoxic (FiO2=0.12) or normoxic (FiO2=0.21) gas mixture for 4 h at rest, on two separated blinded sessions. Arterial oxygen saturation (SpO2), heart rate variability (HRV), end-tidal CO2 (EtCO2), and oxygenation of quadriceps muscle, prefrontal and motor cortices assessed by near-infrared spectroscopy (NIRS) were measured continuously during each session. Acute mountain sickness symptoms were evaluated at the end of each session. During a hypoxic session, SpO2 reduction (∼13%) plateaued after 20 min, while deoxygenation pattern took 30 to 40 min at the cerebral sites to plateau (+5.3±1.6 μMol of deoxygenated-hemoglobin). Deoxygenation was more pronounced in the cerebral cortex compared to the muscle (+2.1±2.3 μMol of deoxygenated-hemoglobin), and NIRS-derived tissue perfusion index showed distinct profiles between the muscle (hypoperfusion) and the brain (hyperperfusion) with prolonged hypoxia. Changes in tissue oxygenation were not associated with cardiorespiratory responses (e.g., HRV, EtCO2) and altitude sickness symptom appearance during hypoxic sessions. These data demonstrate that sustained hypoxia elicits time delay in changes between arterial and tissue (especially cerebral) oxygenation, as well as a tissue-specific sensitivity.
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Affiliation(s)
- Thomas Rupp
- Joseph Fourier University & CHU Grenoble, HP2 Laboratory, F-38043, Grenoble, FrancebNational Institute for Health and Medical Research, U1042, F-38043, Grenoble, France
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Gineste C, De Winter JM, Kohl C, Witt CC, Giannesini B, Brohm K, Le Fur Y, Gretz N, Vilmen C, Pecchi E, Jubeau M, Cozzone PJ, Stienen GJM, Granzier H, Labeit S, Ottenheijm CAC, Bendahan D, Gondin J. In vivo and in vitro investigations of heterozygous nebulin knock-out mice disclose a mild skeletal muscle phenotype. Neuromuscul Disord 2013; 23:357-69. [PMID: 23375831 DOI: 10.1016/j.nmd.2012.12.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 12/07/2012] [Accepted: 12/29/2012] [Indexed: 01/30/2023]
Abstract
Nemaline myopathy is the most common congenital skeletal muscle disease, and mutations in the nebulin gene account for 50% of all cases. Recent studies suggest that the disease severity might be related to the nebulin expression levels. Considering that mutations in the nebulin gene are typically recessive, one would expect that a single functional nebulin allele would maintain nebulin protein expression which would result in preserved skeletal muscle function. We investigated skeletal muscle function of heterozygous nebulin knock-out (i.e., nebulin(+/-)) mice using a multidisciplinary approach including protein and gene expression analysis and combined in vivo and in vitro force measurements. Skeletal muscle anatomy and energy metabolism were studied strictly non-invasively using magnetic resonance imaging and 31P-magnetic resonance spectroscopy. Maximal force production was reduced by around 16% in isolated muscle of nebulin(+/-) mice while in vivo force generating capacity was preserved. Muscle weakness was associated with a shift toward a slower proteomic phenotype, but was not related to nebulin protein deficiency or to an impaired energy metabolism. Further studies would be warranted in order to determine the mechanisms leading to a mild skeletal muscle phenotype resulting from the expression of a single nebulin allele.
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Affiliation(s)
- C Gineste
- Aix-Marseille Université, CRMBM, 13005 Marseille, France
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Rupp T, Jubeau M, Millet GY, Wuyam B, Levy P, Verges S, Perrey S. Muscle, Prefrontal, and Motor Cortex Oxygenation Profiles During Prolonged Fatiguing Exercise. Oxygen Transport to Tissue XXXV 2013; 789:149-155. [DOI: 10.1007/978-1-4614-7411-1_21] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Rupp T, Jubeau M, Millet GY, Perrey S, Esteve F, Wuyam B, Levy P, Verges S. The effect of hypoxemia and exercise on acute mountain sickness symptoms. J Appl Physiol (1985) 2012; 114:180-5. [PMID: 23154995 DOI: 10.1152/japplphysiol.00769.2012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Performing exercise during the first hours of hypoxic exposure is thought to exacerbate acute mountain sickness (AMS), but whether this is due to increased hypoxemia or other mechanisms associated with exercise remains unclear. In 12 healthy men, AMS symptoms were assessed during three 11-h experimental sessions: 1) in Hypoxia-exercise, inspiratory O(2) fraction (Fi(O(2))) was 0.12, and subjects performed 4-h cycling at 45% Fi(O(2))-specific maximal power output from the 4th to the 8th hour; 2) in Hypoxia-rest, Fi(O(2)) was continuously adjusted to match the same arterial oxygen saturation as in Hypoxia-exercise, and subjects remained at rest; and 3) in Normoxia-exercise, Fi(O(2)) was 0.21, and subjects cycled as in Hypoxia-exercise at 45% Fi(O(2))-specific maximal power output. AMS scores did not differ significantly between Hypoxia-exercise and Hypoxia-rest, while they were significantly lower in Normoxia-exercise (Lake Louise score: 5.5 ± 2.1, 4.4 ± 2.4, and 2.3 ± 1.5, and cerebral Environmental Symptom Questionnaire: 1.2 ± 0.7, 1.0 ± 1.0, and 0.3 ± 0.4, in Hypoxia-exercise, Hypoxia-rest, and Normoxia-exercise, respectively; P < 0.01). Headache scored by visual analog scale was higher in Hypoxia-exercise and Hypoxia-rest compared with Normoxia-exercise (36 ± 22, 35 ± 25, and 5 ± 6, P < 0.001), while the perception of fatigue was higher in Hypoxia-exercise compared with Hypoxia-rest (60 ± 24, 32 ± 22, and 46 ± 23, in Hypoxia-exercise, Hypoxia-rest, and Normoxia-exercise, respectively; P < 0.01). Despite significant physiological stress during hypoxic exercise and some AMS symptoms induced by normoxic cycling at similar relative workload, exercise does not significantly worsen AMS severity during the first hours of hypoxic exposure at a given arterial oxygen desaturation. Hypoxemia per se appears, therefore, to be the main mechanism underlying AMS, whether or not exercise is performed.
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Girard O, Koehle MS, MacInnis MJ, Guenette JA, Koehle MS, Verges S, Rupp T, Jubeau M, Perrey S, Millet GY, Chapman RF, Levine BD, Conkin J, Wessel JH, Nespoulet H, Wuyam B, Tamisier R, Verges S, Levy P, Casey DP, Taylor BJ, Snyder EM, Johnson BD, Laymon AS, Stickford JL, Weavil JC, Loeppky JA, Pun M, Schommer K, Bartsch P, Vagula MC, Nelatury CF. Comments on Point:Counterpoint: Hypobaric hypoxia induces/does not induce different responses from normobaric hypoxia. J Appl Physiol (1985) 2012; 112:1788-94. [PMID: 22589492 DOI: 10.1152/japplphysiol.00356.2012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Rupp T, Jubeau M, Wuyam B, Perrey S, Levy P, Millet GY, Verges S. Time-dependent effect of acute hypoxia on corticospinal excitability in healthy humans. J Neurophysiol 2012; 108:1270-7. [DOI: 10.1152/jn.01162.2011] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Contradictory results regarding the effect of hypoxia on cortex excitability have been reported in healthy subjects, possibly depending on hypoxia exposure duration. We evaluated the effects of 1- and 3-h hypoxia on motor corticospinal excitability, intracortical inhibition, and cortical voluntary activation (VA) using transcranial magnetic stimulation (TMS). TMS to the quadriceps cortex area and femoral nerve electrical stimulations were performed in 14 healthy subjects. Motor-evoked potentials (MEPs at 50–100% maximal voluntary contraction; MVC), recruitment curves (MEPs at 30–100% maximal stimulator power output at 50% MVC), cortical silent periods (CSP), and VA were measured in normoxia and after 1 ( n = 12) or 3 ( n = 10) h of hypoxia (FiO2 = 0.12). One-hour hypoxia did not modify any parameters of corticospinal excitability but reduced slightly VA, probably due to the repetition of contractions 1 h apart (96 ± 4% vs. 94 ± 4%; P = 0.03). Conversely, 3-h hypoxia significantly increased 1) MEPs of the quadriceps muscles at all force levels (+26 ± 14%, +24 ± 12%, and +27 ± 17% at 50, 75, and 100% MVC, respectively; P = 0.01) and stimulator power outputs (e.g., +21 ± 14% at 70% maximal power), and 2) CSP at all force levels (+20 ± 18%, +18 ± 19%, and +14 ± 22% at 50, 75, and 100% MVC, respectively; P = 0.02) and stimulator power outputs (e.g., +9 ± 8% at 70% maximal power), but did not modify VA (98 ± 1% vs. 97 ± 3%; P = 0.42). These data demonstrate a time-dependent hypoxia-induced increase in motor corticospinal excitability and intracortical inhibition, without changes in VA. The impact of these cortical changes on physical or psychomotor performances needs to be elucidated to better understand the cerebral effects of hypoxemia.
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Affiliation(s)
- T. Rupp
- HP2 Laboratory, Joseph Fourier University & CHU Grenoble, Grenoble, France
- U1042, INSERM, Grenoble, France
| | - M. Jubeau
- Laboratoire de Physiologie de l'Exercice, Université de Lyon, Saint-Etienne, France
- Laboratoire “Motricité, Interactions, Performance,” University of Nantes, Nantes, France; and
| | - B. Wuyam
- HP2 Laboratory, Joseph Fourier University & CHU Grenoble, Grenoble, France
- U1042, INSERM, Grenoble, France
| | - S. Perrey
- Movement To Health (M2H) Laboratory, Euromov, Montpellier-1 University, Montpellier, France
| | - P. Levy
- HP2 Laboratory, Joseph Fourier University & CHU Grenoble, Grenoble, France
- U1042, INSERM, Grenoble, France
| | - G. Y. Millet
- HP2 Laboratory, Joseph Fourier University & CHU Grenoble, Grenoble, France
- U1042, INSERM, Grenoble, France
- Laboratoire de Physiologie de l'Exercice, Université de Lyon, Saint-Etienne, France
| | - S. Verges
- HP2 Laboratory, Joseph Fourier University & CHU Grenoble, Grenoble, France
- U1042, INSERM, Grenoble, France
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Verges S, Rupp T, Jubeau M, Wuyam B, Esteve F, Levy P, Perrey S, Millet GY. Cerebral perturbations during exercise in hypoxia. Am J Physiol Regul Integr Comp Physiol 2012; 302:R903-16. [DOI: 10.1152/ajpregu.00555.2011] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Reduction of aerobic exercise performance observed under hypoxic conditions is mainly attributed to altered muscle metabolism due to impaired O2 delivery. It has been recently proposed that hypoxia-induced cerebral perturbations may also contribute to exercise performance limitation. A significant reduction in cerebral oxygenation during whole body exercise has been reported in hypoxia compared with normoxia, while changes in cerebral perfusion may depend on the brain region, the level of arterial oxygenation and hyperventilation induced alterations in arterial CO2. With the use of transcranial magnetic stimulation, inconsistent changes in cortical excitability have been reported in hypoxia, whereas a greater impairment in maximal voluntary activation following a fatiguing exercise has been suggested when arterial O2 content is reduced. Electromyographic recordings during exercise showed an accelerated rise in central motor drive in hypoxia, probably to compensate for greater muscle contractile fatigue. This accelerated development of muscle fatigue in moderate hypoxia may be responsible for increased inhibitory afferent signals to the central nervous system leading to impaired central drive. In severe hypoxia (arterial O2 saturation <70–75%), cerebral hypoxia per se may become an important contributor to impaired performance and reduced motor drive during prolonged exercise. This review examines the effects of acute and chronic reduction in arterial O2 (and CO2) on cerebral blood flow and cerebral oxygenation, neuronal function, and central drive to the muscles. Direct and indirect influences of arterial deoxygenation on central command are separated. Methodological concerns as well as future research avenues are also considered.
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Affiliation(s)
- Samuel Verges
- INSERM U1042, Grenoble
- HP2 laboratory, Joseph Fourier University, Grenoble
- Exercise Research Unit, Grenoble University Hospital, Grenoble
| | - Thomas Rupp
- INSERM U1042, Grenoble
- HP2 laboratory, Joseph Fourier University, Grenoble
| | | | - Bernard Wuyam
- INSERM U1042, Grenoble
- HP2 laboratory, Joseph Fourier University, Grenoble
- Exercise Research Unit, Grenoble University Hospital, Grenoble
| | - François Esteve
- Exercise Research Unit, Grenoble University Hospital, Grenoble
- INSERM U836/team 6, Grenoble Institute of Neurosciences, Grenoble
| | - Patrick Levy
- INSERM U1042, Grenoble
- HP2 laboratory, Joseph Fourier University, Grenoble
- Exercise Research Unit, Grenoble University Hospital, Grenoble
| | - Stéphane Perrey
- Movement To Health (M2H), Montpellier-1 University, Euromov, Montpellier; and
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Millet GY, Muthalib M, Jubeau M, Laursen PB, Nosaka K. Severe hypoxia affects exercise performance independently of afferent feedback and peripheral fatigue. J Appl Physiol (1985) 2012; 112:1335-44. [PMID: 22323647 DOI: 10.1152/japplphysiol.00804.2011] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
To test the hypothesis that hypoxia centrally affects performance independently of afferent feedback and peripheral fatigue, we conducted two experiments under complete vascular occlusion of the exercising muscle under different systemic O(2) environmental conditions. In experiment 1, 12 subjects performed repeated submaximal isometric contractions of the elbow flexor to exhaustion (RCTE) with inspired O(2) fraction fixed at 9% (severe hypoxia, SevHyp), 14% (moderate hypoxia, ModHyp), 21% (normoxia, Norm), or 30% (hyperoxia, Hyper). The number of contractions (performance), muscle (biceps brachii), and prefrontal near-infrared spectroscopy (NIRS) parameters and high-frequency paired-pulse (PS100) evoked responses to electrical muscle stimulation were monitored. In experiment 2, 10 subjects performed another RCTE in SevHyp and Norm conditions in which the number of contractions, biceps brachii electromyography responses to electrical nerve stimulation (M wave), and transcranial magnetic stimulation responses (motor-evoked potentials, MEP, and cortical silent period, CSP) were recorded. Performance during RCTE was significantly reduced by 10-15% in SevHyp (arterial O(2) saturation, SpO(2) = ∼75%) compared with ModHyp (SpO(2) = ∼90%) or Norm/Hyper (SpO(2) > 97%). Performance reduction in SevHyp occurred despite similar 1) metabolic (muscle NIRS parameters) and functional (changes in PS100 and M wave) muscle states and 2) MEP and CSP responses, suggesting comparable corticospinal excitability and spinal and cortical inhibition between SevHyp and Norm. It is concluded that, in SevHyp, performance and central drive can be altered independently of afferent feedback and peripheral fatigue. It is concluded that submaximal performance in SevHyp is partly reduced by a mechanism related directly to brain oxygenation.
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Affiliation(s)
- Guillaume Y Millet
- School of Exercise and Health Sciences, Edith Cowan University, Joondalup, Australia.
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Maffiuletti NA, Morelli A, Martin A, Duclay J, Billot M, Jubeau M, Agosti F, Sartorio A. Effect of gender and obesity on electrical current thresholds. Muscle Nerve 2011; 44:202-7. [DOI: 10.1002/mus.22050] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/25/2011] [Indexed: 11/10/2022]
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Aldayel A, Muthalib M, Jubeau M, McGuigan M, Nosaka K. Muscle oxygenation of vastus lateralis and medialis muscles during alternating and pulsed current electrical stimulation. Eur J Appl Physiol 2010; 111:779-87. [PMID: 20978780 DOI: 10.1007/s00421-010-1699-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/11/2010] [Indexed: 11/30/2022]
Abstract
This study compared between alternating and pulsed current electrical muscle stimulation (EMS) for muscle oxygenation and blood volume during isometric contractions. Nine healthy men (23-48 years) received alternating current EMS (2500 Hz) modulated at 75 Hz on the knee extensors of one leg, and pulsed current EMS (75 Hz) for the other leg separated by 2 weeks in a randomised, counter-balanced order. Pulse duration (400 μs), on-off ratio (5-15 s) and other stimulation parameters were matched between conditions and 30 isometric contractions were induced at the knee joint angle of 100° (0° full extension). Changes in tissue oxygenation index (∆TOI) and total hemoglobin volume (∆tHb) of vastus lateralis and medialis muscles over 30 contractions were assessed by a near-infrared spectroscopy, and were compared between conditions by a two-way repeated measures ANOVA. Peak torque produced during EMS increased over 30 contractions in response to the increase in the stimulation intensity for pulsed current, but not for the alternating current EMS. The torque during each isometric contraction was less stable in alternating than pulsed current EMS. The changes in ∆TOI amplitude during relaxation phases and ∆tHb amplitude were not significantly different between conditions. However, the decreases in ∆TOI amplitude during contraction phases from baseline were significantly (P < 0.05) greater for the pulsed current than alternating current from the 18th contraction (-15.6 ± 2.3 vs. -8.9 ± 1.8%) to 30th contraction (-10.7 ± 1.8 vs. -4.8 ± 1.5%). These results suggest that the muscles were less activated in the alternating current EMS when compared with the pulsed current EMS.
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Aldayel A, Jubeau M, McGuigan M, Nosaka K. Comparison between alternating and pulsed current electrical muscle stimulation for muscle and systemic acute responses. J Appl Physiol (1985) 2010; 109:735-44. [DOI: 10.1152/japplphysiol.00189.2010] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study compared alternating current and pulsed current electrical muscle stimulation (EMS) for torque output, skin temperature ( Tsk), blood lactate and hormonal responses, and skeletal muscle damage markers. Twelve healthy men (23–48 yr) received alternating current EMS (2.5 kHz delivered at 75 Hz, 400 μs) for the knee extensors of one leg and pulsed current (75 Hz, 400 μs) for the other leg to induce 40 isometric contractions (on-off ratio 5–15 s) at the knee joint angle of 100° (0°: full extension). The use of the legs for each condition was counterbalanced among subjects, and the two EMS bouts were separated by 2 wk. The current amplitude was consistently increased to maximally tolerable level, and the torque and perceived intensity were recorded over 40 isometric contractions. Tskof the stimulated and contralateral knee extensors were measured before, during, and for 30 min after EMS. Blood lactate, growth hormone, testosterone, insulin-like growth factor 1, testosterone, and cortisol were measured before, during, and for 45 min following EMS. Muscle damage markers included maximal voluntary isometric contraction torque, muscle soreness with a 100-mm visual analog scale, and plasma creatine kinase (CK) activity, which were measured before and 1, 24, 48, 72, and 96 h after EMS. No significant differences in the torque induced during stimulation (∼30% maximal voluntary isometric contraction) and perceived intensity were found, and changes in Tsk, blood lactate, and hormones were not significantly different between conditions. However, all of the measures showed significant ( P < 0.05) changes from baseline values. Skeletal muscle damage was evidenced by prolonged strength loss, development of muscle soreness, and increases in plasma CK activity; however, the changes in the variables were not significantly different between conditions. It is concluded that acute effects of alternating and pulsed current EMS on the stimulated muscles are similar.
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Affiliation(s)
- Abdulaziz Aldayel
- Edith Cowan University, Joondalup, Australia
- King Saud University, Riyadh, Saudi Arabia
| | - Marc Jubeau
- Université de Lyon, Saint-Etienne, France, and Exercise Physiology Laboratory, Jean Monnet University, Saint-Etienne, France
| | - Michael McGuigan
- Edith Cowan University, Joondalup, Australia
- New Zealand Academy of Sport North Island, Auckland; and
- Auckland University of Technology, Auckland, New Zealand
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Muthalib M, Jubeau M, Millet GY, Maffiuletti NA, Ferrari M, Nosaka K. Biceps brachii muscle oxygenation in electrical muscle stimulation. Clin Physiol Funct Imaging 2010; 30:360-368. [PMID: 20618357 DOI: 10.1111/j.1475-097x.2010.00953.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to compare between electrical muscle stimulation (EMS) and maximal voluntary (VOL) isometric contractions of the elbow flexors for changes in biceps brachii muscle oxygenation (tissue oxygenation index, TOI) and haemodynamics (total haemoglobin volume, tHb = oxygenated-Hb + deoxygenated-Hb) determined by near-infrared spectroscopy (NIRS). The biceps brachii muscle of 10 healthy men (23-39 years) was electrically stimulated at high frequency (75 Hz) via surface electrodes to evoke 50 intermittent (4-s contraction, 15-s relaxation) isometric contractions at maximum tolerated current level (EMS session). The contralateral arm performed 50 intermittent (4-s contraction, 15-s relaxation) maximal voluntary isometric contractions (VOL session) in a counterbalanced order separated by 2-3 weeks. Results indicated that although the torque produced during EMS was approximately 50% of VOL (P<0.05), there was no significant difference in the changes in TOI amplitude or TOI slope between EMS and VOL over the 50 contractions. However, the TOI amplitude divided by peak torque was approximately 50% lower for EMS than VOL (P<0.05), which indicates EMS was less efficient than VOL. This seems likely because of the difference in the muscles involved in the force production between conditions. Mean decrease in tHb amplitude during the contraction phases was significantly (P<0.05) greater for EMS than VOL from the 10th contraction onwards, suggesting that the muscle blood volume was lower in EMS than VOL. It is concluded that local oxygen demand of the biceps brachii sampled by NIRS is similar between VOL and EMS.
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Affiliation(s)
- Makii Muthalib
- School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, Australia.,Institute of Health and Biomedical Innovation & School of Human Movement Studies, Queensland University of Technology, Brisbane, Australia
| | - Marc Jubeau
- School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, Australia.,Laboratory INSERM U887, Faculty of Sport Sciences, University of Burgundy, Dijon, France
| | - Guillaume Y Millet
- School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, Australia.,Exercise Physiology Laboratory, Jean Monnet University, Saint-Etienne, France
| | | | - Marco Ferrari
- Department of Health Sciences, University of L'Aquila, L'Aquila, Italy
| | - Kazunori Nosaka
- School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, Australia
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Jubeau M, Gondin J, Martin A, Van Hoecke J, Maffiuletti NA. Differences in twitch potentiation between voluntary and stimulated quadriceps contractions of equal intensity. Scand J Med Sci Sports 2009; 20:e56-62. [PMID: 19602194 DOI: 10.1111/j.1600-0838.2009.00897.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study compared the extent of twitch and M-wave potentiation (POT) between voluntary and stimulated quadriceps contractions performed at the same intensity. Sixteen healthy men completed 10-s isometric knee extensions at 40% of the maximal voluntary contraction torque under electrical stimulation and voluntary conditions. Single stimuli were delivered to the femoral nerve to evoke twitches before (PRE) and from 3 to 600 s after the end of each conditioning contraction. Changes in twitch contractile properties and M-wave characteristics were compared between the conditions. The extent of twitch peak torque POT was smaller for the stimulated (122+/-20% of PRE) than for the voluntary condition (133+/-20% of PRE). The magnitude of POT for the maximal rate of twitch torque development was also smaller for the stimulated trial. Rectus femoris M-wave amplitude was potentiated by the voluntary but not by the stimulated contraction. It was concluded that stimulated contractions resulted in smaller twitch and M-wave POT than voluntary contractions, despite equivalent torque output and duration. The spatially and temporally fixed recruitment of motor units with electrical stimulation and therefore the lower number of activated motor units compared with voluntary actions of equal intensity could explain the present findings.
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Affiliation(s)
- M Jubeau
- Laboratoire Institut National de la Santé et de la Recherche Médicale (INSERM) U887 Motricité-Plasticité, Faculté des Sciences du Sport, Université de Bourgogne, Dijon, France.
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Muthalib M, Jubeau M, Millet GY, Maffiuletti NA, Nosaka K. Comparison between electrically evoked and voluntary isometric contractions for biceps brachii muscle oxidative metabolism using near-infrared spectroscopy. Eur J Appl Physiol 2009; 107:235-41. [PMID: 19568766 DOI: 10.1007/s00421-009-1118-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2009] [Indexed: 10/20/2022]
Abstract
This study compared voluntary (VOL) and electrically evoked isometric contractions by muscle stimulation (EMS) for changes in biceps brachii muscle oxygenation (tissue oxygenation index, DeltaTOI) and total haemoglobin concentration (DeltatHb = oxygenated haemoglobin + deoxygenated haemoglobin) determined by near-infrared spectroscopy. Twelve men performed EMS with one arm followed 24 h later by VOL with the contralateral arm, consisting of 30 repeated (1-s contraction, 1-s relaxation) isometric contractions at 30% of maximal voluntary contraction (MVC) for the first 60 s, and maximal intensity contractions thereafter (MVC for VOL and maximal tolerable current at 30 Hz for EMS) until MVC decreased approximately 30% of pre-exercise MVC. During the 30 contractions at 30% MVC, DeltaTOI decrease was significantly (P < 0.05) greater and DeltatHb was significantly (P < 0.05) lower for EMS than VOL, suggesting that the metabolic demand for oxygen in EMS is greater than VOL at the same torque level. However, during maximal intensity contractions, although EMS torque (approximately 40% of VOL) was significantly (P < 0.05) lower than VOL, DeltaTOI was similar and tHb was significantly (P < 0.05) lower for EMS than VOL towards the end, without significant differences between the two sessions in the recovery period. It is concluded that the oxygen demand of the activated biceps brachii muscle in EMS is comparable to VOL at maximal intensity.
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Affiliation(s)
- Makii Muthalib
- School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Joondalup, WA, 6027, Australia
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Maffiuletti NA, Bramanti J, Jubeau M, Bizzini M, Deley G, Cometti G. Feasibility and Efficacy of Progressive Electrostimulation Strength Training for Competitive Tennis Players. J Strength Cond Res 2009; 23:677-82. [DOI: 10.1519/jsc.0b013e318196b784] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Maffiuletti NA, Herrero AJ, Jubeau M, Impellizzeri FM, Bizzini M. Differences in electrical stimulation thresholds between men and women. Ann Neurol 2008; 63:507-12. [PMID: 18300313 DOI: 10.1002/ana.21346] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Surface electrical stimulation (ES) of skeletal muscle is used in a variety of clinical settings in healthy and unhealthy subjects of both sexes. Although women generally present larger amounts of subcutaneous adipose tissue than men, which could limit current flow to the stimulated muscle, sex-related differences in ES current levels have not been clearly demonstrated to date. We report data from healthy men and women. METHODS Sensory (current perception), motor (minimal knee extension torque production), and supramotor thresholds (10% of the maximal voluntary knee extension torque) and perceived pain during surface ES of the quadriceps femoris muscle were investigated in 40 healthy volunteers (20 men, 20 women). RESULTS Sensory threshold was lower in women than in men (-43%; p < 0.001). Similarly, female muscles required lower current amplitudes to attain the supramotor threshold (-17%; p < 0.01). The Visual Analogue Scale pain score was significantly greater in women than in men at motor threshold (+112%; p < 0.01) but not at supramotor threshold (+36%; p > 0.05). INTERPRETATION Collectively, our data demonstrate higher sensory and supramotor excitability to surface ES in female subjects and provide further evidence for a neurophysiological explanation for more pronounced pain perception in women. These observations may help clinicians to better understand the sex-specific response to ES and to design more rational stimulation treatments with the ultimate goal of optimizing patient care and safety.
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