1
|
Soedirdjo SDH, Chung YC, Dhaher YY. Sex hormone mediated change on flexion reflex. Front Neurosci 2023; 17:1263756. [PMID: 38188036 PMCID: PMC10768023 DOI: 10.3389/fnins.2023.1263756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 11/27/2023] [Indexed: 01/09/2024] Open
Abstract
It has been shown that estrogen and progesterone receptors are expressed in the spinal cord; therefore, fluctuation in their concentrations may affect the spinal network and modulate the control of movement. Herein, we assessed the neuro-modulatory effect of sex hormones on the polysynaptic spinal network by using a flexion reflex network as a model system. Twenty-four healthy eumenorrheic women (age 21-37 years) were tested every other day for one menstrual cycle. Serum estradiol and progesterone were acquired at the time of testing. The flexion reflex of the tibialis anterior was elicited by sending an innocuous electrical stimulus directly to the posterior tibial nerve or plantar cutaneous afferent. Analyses were performed for each menstrual cycle phase: the follicular phase and the luteal phase. Increases in estradiol or progesterone concentrations were not associated with reflex duration or root mean squared (RMS) amplitude in either the follicular or luteal phases. In the luteal phase, an increase in the estradiol concentration was associated with a longer latency of the reflex (b = 0.23, p = 0.038). The estradiol × progesterone interaction was found towards significance (b = -0.017, p = 0.081). These results highlight the potential synergistic effect of estradiol and progesterone and may provide indirect confirmatory evidence of the observed modulatory effect.
Collapse
Affiliation(s)
- Subaryani D. H. Soedirdjo
- Department of Physical Medicine and Rehabilitation, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Yu-Chen Chung
- Department of Physical Medicine and Rehabilitation, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Yasin Y. Dhaher
- Department of Physical Medicine and Rehabilitation, University of Texas Southwestern Medical Center, Dallas, TX, United States
- Department of Biomedical Engineering, University of Texas Southwestern Medical Center, Dallas, TX, United States
- Peter O’Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX, United States
| |
Collapse
|
2
|
Nosikova I, Riabova A, Kitov V, Tomilovskaya E. Corticospinal excitability after 5-day Dry Immersion in women. Front Neural Circuits 2023; 17:1163346. [PMID: 37811482 PMCID: PMC10556517 DOI: 10.3389/fncir.2023.1163346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 08/29/2023] [Indexed: 10/10/2023] Open
Abstract
In light of the development of manned astronautics and the increasing participation of women in space flights, the question of female body adaptation to microgravity conditions becomes relevant. Currently, one of the important directions in this issue is to study the effects of support withdrawal as a factor of weightlessness on the human sensorimotor system. Dry Immersion is one of the well-known ground-based models, which adequately reproduces the main physiological effects of space flight. The aim of this study was to evaluate the changes in motor evoked potentials of the lower leg gravity-dependent muscles in women after a 5-day Dry Immersion. We analyzed evoked responses to transcranial and trans-spinal magnetic stimulation. In this method, areas of interest (the motor cortex and lumbosacral thickening of the spinal cord) are stimulated with an electromagnetic stimulus. The experiment was conducted with the participation of 16 healthy female volunteers with a natural menstrual cycle. The thresholds, amplitudes, and latencies of motor potentials evoked by magnetic stimulation were assessed. We showed that 5-day exposure to support withdrawal leads to a decrease in motor-evoked potential thresholds and central motor conduction time, although changes in motor response amplitudes were ambiguous. The data obtained correspond to the results of previous research on Dry Immersion effects on the sensorimotor system in men.
Collapse
Affiliation(s)
- Inna Nosikova
- Laboratory of Gravitational Physiology of the Sensorimotor System, Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Alexandra Riabova
- Laboratory of Gravitational Physiology of the Sensorimotor System, Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Vladimir Kitov
- Laboratory of Gravitational Physiology of the Sensorimotor System, Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| | - Elena Tomilovskaya
- Laboratory of Gravitational Physiology of the Sensorimotor System, Institute of Biomedical Problems of the Russian Academy of Sciences, Moscow, Russia
| |
Collapse
|
3
|
Johnson KA, Petrie MA, Shields RK. Biomarkers for rapid H-reflex operant conditioning among females. J Neurophysiol 2023; 129:685-699. [PMID: 36791051 PMCID: PMC10010925 DOI: 10.1152/jn.00188.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 02/16/2023] Open
Abstract
Operant conditioning of a spinal monosynaptic pathway using the Hoffman reflex (H-reflex) is well established in animal and human studies. There is a subset within the human population (∼20% nonresponders) who are unable to up train this pathway suggesting some distinct or unique identifying characteristics. Importantly, females, who have a nine times higher rate of injury during human performance activities than men, have been understudied in areas of CNS neuroplasticity. Our long-term goal is to understand if innate ability to rapidly up train the H-reflex is predictive of future performance-based injury among females. In this study, we primarily determined whether healthy, young females could rapidly increase the H-reflex within a single session of operant conditioning and secondarily determined if electro-physiological, humoral, cognitive, anthropometric, or anxiety biomarkers distinguished the responders from nonresponders. Eighteen females (mean age: 24) participated in the study. Overall, females showed a group main effect for up training the H-reflex (P < 0.05). Of the cohort, 10 of 18 females met the criteria for up training the H-reflex (responders). The responders showed lower levels of estradiol (P < 0.05). A multivariate stepwise regression model supported that extracellular to intracellular water ratio (ECW/ICW) and H-max/M-max ratio explained 60% of the variation in up training among females. These findings support that females can acutely upregulate the H-reflex with training and that electro-physiological and hormonal factors may be associated with the up training.NEW & NOTEWORTHY Young females who acutely increase their H-reflexes with operant conditioning had lower levels of estradiol. However, the best predictors of those who could up-train the H-reflex were baseline H-reflex excitability (H-max/M-max) and extracellular to intracellular water ratio (ECW/ICW). Future studies are warranted to understand the complex relationship between operant conditioning, human performance, and injury among active young females.
Collapse
Affiliation(s)
- Kristin A Johnson
- Department of Physical Therapy and Rehabilitation Science, University of Iowa, Iowa City, Iowa, United States
| | - Michael A Petrie
- Department of Physical Therapy and Rehabilitation Science, University of Iowa, Iowa City, Iowa, United States
| | - Richard K Shields
- Department of Physical Therapy and Rehabilitation Science, University of Iowa, Iowa City, Iowa, United States
| |
Collapse
|
4
|
Buggio L, Barbara G, Facchin F, Ghezzi L, Dridi D, Vercellini P. The influence of hormonal contraception on depression and female sexuality: a narrative review of the literature. Gynecol Endocrinol 2022; 38:193-201. [PMID: 34913798 DOI: 10.1080/09513590.2021.2016693] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE Over the past decades, an increasing number of women have been using hormonal contraception. The potential role of sex hormones in regulating vegetative, psychophysiological, and cognitive functions has been highlighted in several studies, and there is a need to further understand the impact of hormonal contraception on women's quality of life, especially as regards psychological health and sexuality. METHODS We conducted a narrative review aimed at clarifying the mechanisms involved in the interaction between sex hormones and the brain, also focusing on the association between hormonal contraception and mood and sexual function. RESULTS Our findings clarified that hormonal contraception may be associated with depressive symptoms, especially among adolescents, and with sexual dysfunction. However, the evidence included in this review was conflicting and did not support the hypothesis that hormonal contraception directly causes depressive symptoms, major depressive disorder, or sexual dysfunction. CONCLUSIONS The optimal hormonal contraception should be identified in the context of shared decision making, considering the preferences and needs of each woman, as well as her physical and psychosexual conditions.
Collapse
Affiliation(s)
- Laura Buggio
- Gynecology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giussy Barbara
- Gynecology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- SVSeD, Service for Sexual and Domestic Violence and Obstetric and Gynecology Emergency Department, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Via Commenda, Italy
- Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, Milan, Italy
| | - Federica Facchin
- Department of Psychology, Catholic University of the Sacred Heart, Milan, Italy
| | - Laura Ghezzi
- Department of Neurology, Washington University, St. Louis, MO, USA
- Dino Ferrari Center, Università degli Studi di Milano, Milan, Italy
| | - Dhouha Dridi
- Gynecology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Paolo Vercellini
- Gynecology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, Milan, Italy
| |
Collapse
|
5
|
Grosprêtre S, Marusic U, Gimenez P, Ennequin G, Mourot L, Isacco L. Stand Up to Excite the Spine: Neuromuscular, Autonomic, and Cardiometabolic Responses During Motor Imagery in Standing vs. Sitting Posture. Front Physiol 2021; 12:762452. [PMID: 34887774 PMCID: PMC8649772 DOI: 10.3389/fphys.2021.762452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 10/23/2021] [Indexed: 11/16/2022] Open
Abstract
Motor imagery (MI) for health and performance strategies has gained interest in recent decades. Nevertheless, there are still no studies that have comprehensively investigated the physiological responses during MI, and no one questions the influence of low-level contraction on these responses. Thus, the aim of the present study was to investigate the neuromuscular, autonomic nervous system (ANS), and cardiometabolic changes associated with an acute bout of MI practice in sitting and standing condition. Twelve young healthy males (26.3 ± 4.4 years) participated in two experimental sessions (control vs. MI) consisting of two postural conditions (sitting vs. standing). ANS, hemodynamic and respiratory parameters, body sway parameters, and electromyography activity were continuously recorded, while neuromuscular parameters were recorded on the right triceps surae muscles before and after performing the postural conditions. While MI showed no effect on ANS, the standing posture increased the indices of sympathetic system activity and decreased those of the parasympathetic system (p < 0.05). Moreover, MI during standing induced greater spinal excitability compared to sitting posture (p < 0.05), which was accompanied with greater oxygen consumption, energy expenditure, ventilation, and lower cardiac output (p < 0.05). Asking individuals to perform MI of an isometric contraction while standing allows them to mentally focus on the motor command, not challenge balance, and produce specific cardiometabolic responses. Therefore, these results provide further evidence of posture and MI-related modulation of spinal excitability with additional autonomic and cardiometabolic responses in healthy young men.
Collapse
Affiliation(s)
- Sidney Grosprêtre
- EA4660-C3S Laboratory - Culture, Sports, Health and Society, University Bourgogne Franche-Comté, Besançon, France
| | - Uros Marusic
- Institute for Kinesiology Research, Science and Research Centre of Koper, Koper, Slovenia.,Department of Health Sciences, Alma Mater Europaea-ECM, Maribor, Slovenia
| | - Philippe Gimenez
- EA4660-C3S Laboratory - Culture, Sports, Health and Society, University Bourgogne Franche-Comté, Besançon, France
| | - Gael Ennequin
- Université Clermont Auvergne, CRNH, AME2P, Clermont-Ferrand, France
| | - Laurent Mourot
- EA3920-Prognostic Markers and Regulatory Factors of Heart and Vascular Diseases, and Exercise Performance, Health, Innovation Platform, University Bourgogne Franche-Comté, Besançon, France.,National Research Tomsk Polytechnic University, Tomsk, Russia
| | - Laurie Isacco
- Université Clermont Auvergne, CRNH, AME2P, Clermont-Ferrand, France.,EA3920-Prognostic Markers and Regulatory Factors of Heart and Vascular Diseases, and Exercise Performance, Health, Innovation Platform, University Bourgogne Franche-Comté, Besançon, France
| |
Collapse
|
6
|
Thompson BM, Drover KB, Stellmaker RJ, Sculley DV, Janse de Jonge XAK. The Effect of the Menstrual Cycle and Oral Contraceptive Cycle on Muscle Performance and Perceptual Measures. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182010565. [PMID: 34682310 PMCID: PMC8536049 DOI: 10.3390/ijerph182010565] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 12/23/2022]
Abstract
Most reproductive-aged women are exposed to fluctuating female steroid hormones due to the menstrual cycle or oral contraceptive use. This study investigated the potential effect of the menstrual cycle and combined monophasic oral contraceptive cycle on various aspects of muscle performance. Thirty active females (12 with a natural menstrual cycle, 10 taking a high-androgenicity oral contraceptive and 8 taking a low-androgenicity oral contraceptive), aged 18 to 30 years, were tested three times throughout one menstrual or oral contraceptive cycle. Counter-movement jumps, bilateral hop jumps, handgrip strength, isometric knee extensor strength and isokinetic knee flexion and extension were assessed. Perceptual ratings of fatigue, muscle soreness, pain and mood were recorded. Most variables showed no significant changes over the menstrual or oral contraceptive cycle. However, for the menstrual cycle group, isokinetic knee flexion at 240° s−1, and time of flight in bilateral hopping and counter movement jumps showed better results during the mid-luteal phase compared with the late follicular phase. For the high-androgenicity oral contraceptive group, isokinetic knee flexion at 240° s−1 was significantly higher in the late hormone phase compared with the early hormone phase. For the low-androgenicity oral contraceptive group, time of flight for the counter-movement jumps was lower in the late hormone phase compared with the early hormone phase. The findings indicate that faster and explosive aspects of muscle performance may be influenced by endogenous and exogenous female hormones.
Collapse
Affiliation(s)
- Belinda M. Thompson
- Faculty of Medicine, Health and Human Sciences, Macquarie University, North Ryde, NSW 2109, Australia
- School of Environmental and Life Sciences, The University of Newcastle, Ourimbah, NSW 2258, Australia; (K.B.D.); (R.J.S.); (X.A.K.J.d.J.)
- Correspondence:
| | - Kaitlyn B. Drover
- School of Environmental and Life Sciences, The University of Newcastle, Ourimbah, NSW 2258, Australia; (K.B.D.); (R.J.S.); (X.A.K.J.d.J.)
| | - Rhiannon J. Stellmaker
- School of Environmental and Life Sciences, The University of Newcastle, Ourimbah, NSW 2258, Australia; (K.B.D.); (R.J.S.); (X.A.K.J.d.J.)
| | - Dean V. Sculley
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Ourimbah, NSW 2258, Australia;
| | - Xanne A. K. Janse de Jonge
- School of Environmental and Life Sciences, The University of Newcastle, Ourimbah, NSW 2258, Australia; (K.B.D.); (R.J.S.); (X.A.K.J.d.J.)
| |
Collapse
|
7
|
Mendonca GV, Vila-Chã C, Teodósio C, Goncalves AD, Freitas SR, Mil-Homens P, Pezarat-Correia P. Contralateral training effects of low-intensity blood-flow restricted and high-intensity unilateral resistance training. Eur J Appl Physiol 2021; 121:2305-2321. [PMID: 33982187 DOI: 10.1007/s00421-021-04708-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/30/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Determine whether unilateral low-intensity blood-flow restricted (LIBFR) exercise is as effective as high-intensity (HI) resistance training for improving contralateral muscle strength. METHODS Thirty healthy adults (20-30 years) were randomly allocated to the following dynamic plantar-flexion training interventions: HI [75% of one-repetition maximum (1RM), 4 sets, 10 reps] and LIBFR [20% of 1RM, 4 sets, 30 + 15 + 15 + 15 reps]. Evoked V-wave and H-reflex recruitment curves, as well as maximal voluntary contraction (MVC) and panoramic ultrasound assessments of the trained and untrained soleus muscles were obtained pre-training, post-4 weeks of training and post-4 weeks of detraining. RESULTS Both interventions failed to increase contralateral MVC and muscle cross-sectional area (CSA). Yet, contralateral rate of torque development (RTD) was enhanced by both regimens (12-26%) and this was accompanied by heightened soleus EMG within the first milliseconds of the rising torque-time curve (14-22%; p < 0.05). These improvements were dissipated after detraining. Contralateral adaptations were not accompanied by changes in V-wave or H-reflex excitability. Conversely, LIBFR and HI elicited a similar magnitude of ipsilateral increase in MVC, RTD and CSA post-training (10-18%). Improvements in V-wave amplitude and soleus EMG were limited to the trained leg assigned to LIBFR training (p < 0.05). While gains in strength and CSA remained preserved post-4 weeks of detraining, this did not occur with RTD. CONCLUSION Since gains in RTD were similar between interventions, our findings indicate that both training regimens can be used interchangeably for improving contralateral rapid torque production. Ultimately, this may be beneficial in circumstances of limb immobilization after injury or surgery.
Collapse
Affiliation(s)
- Goncalo V Mendonca
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisbon, Portugal. .,CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal.
| | - Carolina Vila-Chã
- Polytechnic Institute of Guarda, Av. Dr. Francisco Sá Carneiro, n. 50, 6300-559, Guarda, Portugal.,Research Center in Sports Sciences, Health and Human Development (CIDESD), Vila-Real, Portugal
| | - Carolina Teodósio
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisbon, Portugal
| | - André D Goncalves
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisbon, Portugal
| | - Sandro R Freitas
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisbon, Portugal.,CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
| | - Pedro Mil-Homens
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisbon, Portugal.,CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
| | - Pedro Pezarat-Correia
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, Dafundo, 1499-002, Lisbon, Portugal.,CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1499-002, Dafundo, Portugal
| |
Collapse
|
8
|
THE EFFECT OF ESTROGEN DEFICIENCY ON THE FUNCTIONING OF ARC CENTRAL LINK SEGMENTAL REFLEX. WORLD OF MEDICINE AND BIOLOGY 2021. [DOI: 10.26724/2079-8334-2021-4-78-242-246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
9
|
Mendonca GV, Pezarat-Correia P, Gonçalves AD, Gomes M, Correia JM, Vila-Chã C. Sex differences in soleus muscle H-reflex and V-wave excitability. Exp Physiol 2020; 105:1928-1938. [PMID: 32886814 DOI: 10.1113/ep088820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/02/2020] [Indexed: 12/12/2022]
Abstract
NEW FINDINGS What is the central question of this study? How do H-reflex and V-wave excitability compare between men and women engaging in similar levels of physical activity? What is the main finding and its importance? H-reflex excitability is lower in women than in men because of their greater level of antagonist co-activation during sustained plantar flexion isometric exercise. In addition, supraspinal drive is similar between men and women independently of their differences in H-reflex excitability and antagonist muscle co-activation. ABSTRACT We compared H-reflex and V-wave excitability between men and women engaging in similar levels of physical activity. We also explored whether differences in antagonist muscle co-activation between sexes might partially explain sexual dimorphism in the excitability of the H-reflex and V-wave. Fifty-seven young participants were included (29 men: 21.7 ± 2.3 years; 28 women: 22.4 ± 3.3 years). Soleus M- and H-recruitment curves were constructed on a tonic background muscle activation. V-waves were elicited during maximal voluntary contraction (MVC). Besides being stronger than women, men achieved greater Hmax /Mmax values and presented a steeper slope of the ascending limb of the H-reflex recruitment curve (P < 0.05). The current intensity required to elicit Hmax was lower for men (P < 0.05). The co-activation of the tibialis anterior muscle during the sustained plantar flexions was greater in women (ratio between tibialis and soleus normalized EMG: 20.5 vs. 8.3%, P < 0.05). Covariance analysis showed that sexual dimorphism in H-reflex excitability was dissipated when controlling for antagonist co-activation. V-wave normalized amplitude was similar between sexes even after controlling for the effects of Hmax /Mmax and antagonist co-activation as covariates. Thus, women exhibit lower H-reflex excitability than men and this is dependent on their higher level of antagonist muscle co-activation. While sex differences in antagonist co-activation persist during MVCs, this is not the case for V-wave normalized amplitude. Thus, although the efficacy of the transmission between Ia afferent fibres to α-motoneurons is lower in women because of a greater level of antagonist co-activation, our findings are consistent with similar supraspinal drive between sexes.
Collapse
Affiliation(s)
- Goncalo V Mendonca
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal.,CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - Pedro Pezarat-Correia
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal.,CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - André D Gonçalves
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - Miguel Gomes
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - Joana M Correia
- Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal.,CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisbon, Portugal
| | - Carolina Vila-Chã
- Polytechnic Institute of Guarda, Guarda, Portugal.,Health and Human Development (CIDESD), Research Center in Sports Sciences, Vila Real, Portugal
| |
Collapse
|
10
|
Bagheri R, Pourahmadi MR, Hedayati R, Safavi-Farokhi Z, Aminian-Far A, Tavakoli S, Bagheri J. Relationships Between Hoffman Reflex Parameters, Trait Stress, and Athletic Performance. Percept Mot Skills 2018; 125:749-768. [PMID: 29909738 DOI: 10.1177/0031512518782562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study evaluated the relationships between trait stress, Hoffman reflex, and performance among 36 healthy amateur male athletes. We first obtained a trait stress questionnaire from participants and then assigned them to high- and low-stress groups. We next recorded Hoffman reflex data from the soleus and lateral gastrocnemius muscles and then examined their athletic performance on testing protocols separated by a 72-hour washout period. Performance testing utilized vertical jump height, 20 -m sprint time, and standing stork tests. There were significant correlations between (a) the standing stork test, vertical jump height, and trait stress and (b) Hmax/ Mmax ratios, threshold intensity ( Hth), the intensity of the Hmax, and the intensity of the Hlast. Hth, the intensity of Hmax, and the intensity of Hlast were significantly higher among the low-stress compared with the high-stress participant groups ( p < .05), despite participants' similar training history. We suggest that self-perceived psychological stress affects performance through neural adaptation.
Collapse
Affiliation(s)
- Rasool Bagheri
- 1 Neuromuscular Rehabilitation Research Center, Faculty of Rehabilitation Sciences, Semnan University of Medical Sciences, Iran
| | - Mohammad Reza Pourahmadi
- 2 Department of Physiotherapy, School of Rehabilitation Sciences, Iran University of Medical Sciences and Health Services, Iran
| | - Rozita Hedayati
- 1 Neuromuscular Rehabilitation Research Center, Faculty of Rehabilitation Sciences, Semnan University of Medical Sciences, Iran
| | - Ziaeddin Safavi-Farokhi
- 1 Neuromuscular Rehabilitation Research Center, Faculty of Rehabilitation Sciences, Semnan University of Medical Sciences, Iran
| | - Atefeh Aminian-Far
- 1 Neuromuscular Rehabilitation Research Center, Faculty of Rehabilitation Sciences, Semnan University of Medical Sciences, Iran
| | - Sadegh Tavakoli
- 3 Department of Physiotherapy, School of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences and Health Services, Tehran, Iran
| | - Jafar Bagheri
- 4 Department of Anatomy, School of Medicine, Shiraz University of Medical Sciences and Health Services, Iran
| |
Collapse
|
11
|
|