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Liakou CA, Fatouros IG, Poulios A, Tsatalas T, Karampina E, Karanika P, Kaloudi D, Rosvoglou A, Tsimeas P, Kamperi A, Syrou N, Gatsas A, Papanikolaou K, Draganidis D, Tsaklis P, Giakas G, Jamurtas AZ, Deli CK. Recovery kinetics following sprint training: resisted versus unresisted sprints. Eur J Appl Physiol 2024; 124:881-896. [PMID: 37776346 PMCID: PMC10879260 DOI: 10.1007/s00421-023-05317-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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 09/04/2023] [Indexed: 10/02/2023]
Abstract
PURPOSE To determine the recovery kinetics of performance and exercise-induced muscle damage following different sprint-training protocols. METHODS In a crossover design, ten male and female athletes (20.6 ± 2.4 years) performed 2 × (3 × 20 m: 2 min rest) and 1× (3 × 30 m: 3 min rest) of: (a) unresisted sprints (UST), (b) resisted sprints with 10% of body mass (BM) load (RST10), (c) resisted sprints with 20% BM load (RST20), against a control trial (no-training). RESULTS Blood lactate (mmol/L) increased post-training versus pre-training in all sprint-training trials (6.7 ± 2.4 vs 1.2 ± 0.2, 5.6 ± 2.4 vs 1.3 ± 0.3, 7.3 ± 2.7 vs 1.2 ± 0.3, in UST, RST10, RST20, respectively), as did creatine kinase (U/L) 24 h, 48 h and 72 h post-training (UST: 251 ± 173, 238 ± 154, 209 ± 115 vs 155 ± 9, RST10: 252 ± 134, 240 ± 83, 218 ± 103 vs 164 ± 106; RST20: 237 ± 133, 323 ± 303, 262 ± 184 vs 179 ± 106, respectively). DOMS of knee-extensors (KE) and knee-flexors (KF) increased post-training up to 72 h in all sprint-training trials versus pre-training (ranging from 1.6 ± 1.3 to 3.8 ± 2.8 vs 1.0 ± 0, respectively). Eccentric torque (N m) of the KE of the non-dominant limb, decreased 24 h post-training versus pre-training in all sprint-training trials (UST: 249 ± 49 vs 266 ± 54; RST10: 229 ± 52 vs 273 ± 72; RST20: 253 ± 6 vs 262 ± 56), as did that of the KF of the dominant limb (UST: 135 ± 29 vs 144 ± 26; RST10: 130 ± 29 vs 140 ± 25; RST20: 139 ± 33 vs 142 ± 26). 10-m sprint-time (s) increased 48 h post-training versus pre-training (1.81 ± 0.15 vs 1.77 ± 0.11), and 30-m sprint-time increased 24 h, 48 h, 72 h post-training versus pre-training (4.35 ± 0.36, 4.40 ± 0.44, 4.33 ± 0.41 vs 4.21 ± 0.34, respectively), only in RST20. CONCLUSIONS Unresisted and resisted sprint-training induces prolonged reduction of muscle strength (24 h), and sprinting performance (72 h), associated with prolonged increase of DOMS and CK (72 h).
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Affiliation(s)
- Christina A Liakou
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Ioannis G Fatouros
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Athanasios Poulios
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Evangeli Karampina
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Panagiota Karanika
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Despoina Kaloudi
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Anastasia Rosvoglou
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Panagiotis Tsimeas
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Anna Kamperi
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Niki Syrou
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Athanasios Gatsas
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Konstantinos Papanikolaou
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Dimitrios Draganidis
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Panagiotis Tsaklis
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Giannis Giakas
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Athanasios Z Jamurtas
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Chariklia K Deli
- Department of Physical Education and Sport Science, School of Physical Education, Sport Science and Dietetics, University of Thessaly, Karies, 42100, Trikala, Greece.
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Baldimtsi E, Mouzakidis C, Karathanasi EM, Verykouki E, Hassandra M, Galanis E, Hatzigeorgiadis A, Goudas M, Zikas P, Evangelou G, Papagiannakis G, Bellis G, Kokkotis C, Tsatalas T, Giakas G, Theodorakis Y, Tsolaki M. Effects of Virtual Reality Physical and Cognitive Training Intervention On Cognitive Abilities of Elders with Mild Cognitive Impairment. J Alzheimers Dis Rep 2023; 7:1475-1490. [PMID: 38225966 PMCID: PMC10789285 DOI: 10.3233/adr-230099] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 11/28/2023] [Indexed: 01/17/2024] Open
Abstract
Background Virtual reality (VR) technology has become increasingly used for assessment and intervention in the neuroscience field. Objective We aimed to investigate the effects of a VR Training System, named VRADA (VR Exercise App for Dementia and Alzheimer's Patients), on the cognitive functioning of older people with mild cognitive impairment (MCI). Methods In this intervention study, 122 older adults with MCI were randomly assigned to five groups (the VRADA group (n = 28), a bike group (n = 11), a physical exercise group (n = 24), a mixed group (physical and cognitive exercise) (n = 31), and a non-contact control group (n = 28). The VRADA group underwent 32 physical and cognitive training sessions, performed 2 or 3 times weekly for 12 weeks in the VR environment. All participants had detailed neuropsychological assessments before and after intervention. Results A series of linear regression models revealed that the VRADA group showed improvement or no deterioration in cognitive decline in global cognitive function (MMSE), verbal memory (Rey Auditory Verbal Learning Test and WAIS forward test), and executive functions, mental flexibility (Trail Making Test B). Conclusions This interventionstudy indicates that the VRADA system improves the cognitive function of elders with MCI.
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Affiliation(s)
- Eleni Baldimtsi
- Greek Association of Alzheimer’s Disease & Related Disorders, Alzheimer Hellas, Thessaloniki, Macedonia, Greece
- 1st Department of Neurology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Christos Mouzakidis
- Greek Association of Alzheimer’s Disease & Related Disorders, Alzheimer Hellas, Thessaloniki, Macedonia, Greece
| | - Eleni Maria Karathanasi
- Greek Association of Alzheimer’s Disease & Related Disorders, Alzheimer Hellas, Thessaloniki, Macedonia, Greece
| | - Eleni Verykouki
- School of Medicine, Department of Hygiene, Social-Preventive Medicine and Medical Statistics, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
- Department of Agriculture, Crop Production and Rural Environment, School of Agricultural Sciences, University of Thessaly, Volos, Greece
| | - Mary Hassandra
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Evangelos Galanis
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Antonis Hatzigeorgiadis
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Marios Goudas
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Paul Zikas
- ORamaVR S.A., Science and Technology Park of Crete, Heraklion, Crete, Greece
| | - Giannis Evangelou
- ORamaVR S.A., Science and Technology Park of Crete, Heraklion, Crete, Greece
| | - George Papagiannakis
- ORamaVR S.A., Science and Technology Park of Crete, Heraklion, Crete, Greece
- Institute of Computer Science, Foundation for Research and Technology – Hellas (FORTH), University of Crete, Heraklion, Crete, Greece
| | - George Bellis
- Biomechanical Solutions Engineering (BME), Karditsa, Greece
| | - Christos Kokkotis
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
- Biomechanical Solutions Engineering (BME), Karditsa, Greece
| | - Themistoklis Tsatalas
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Giannis Giakas
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Yannis Theodorakis
- School of Physical Education, Sport Science and Dietetics, Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Magda Tsolaki
- Greek Association of Alzheimer’s Disease & Related Disorders, Alzheimer Hellas, Thessaloniki, Macedonia, Greece
- Laboratory of Neurodegenerative Diseases, Center for Interdisciplinary Research and Innovation (CIRI - AUTh), Balkan Center, Building A, Greece
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Jirovska R, Kay AD, Tsatalas T, Van Enis AJ, Kokkotis C, Giakas G, Mina MA. The Influence of Unstable Load and Traditional Free-Weight Back Squat Exercise on Subsequent Countermovement Jump Performance. J Funct Morphol Kinesiol 2023; 8:167. [PMID: 38132722 PMCID: PMC10744151 DOI: 10.3390/jfmk8040167] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/08/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023] Open
Abstract
The purpose of the present study was to examine the effects of a back squat exercise with unstable load (UN) and traditional free-weight resistance (FWR) on subsequent countermovement jump (CMJ) performance. After familiarisation, thirteen physically active males with experience in resistance training visited the laboratory on two occasions during either experimental (UN) or control (FWR) conditions separated by at least 72 h. In both sessions, participants completed a task-specific warm-up routine followed by three maximum CMJs (pre-intervention; baseline) and a set of three repetitions of either UN or FWR back squat exercise at 85% 1-RM. During the UN condition, the unstable load was suspended from the bar with elastic bands and accounted for 15% of the total load. Post-intervention, three maximum CMJs were performed at 30 s, 4 min, 8 min and 12 min after the last repetition of the intervention. The highest CMJ for each participant was identified for each timepoint. No significant increases (p > 0.05) in jump height, peak concentric power, or peak rate of force development (RFD) were found after the FWR or UN conditions at any timepoint. The lack of improvements following both FWR and UN conditions may be a consequence of the low percentage of unstable load and the inclusion of a comprehensive task-specific warm-up. Further research is required to explore higher UN load percentages (>15%) and the chronic effects following the implementation of a resistance training programme.
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Affiliation(s)
- Renata Jirovska
- Department of Sport, Outdoor and Exercise Science, School of Human Sciences & Human Sciences Research Centre, University of Derby, Kedleston Road, Derby DE22 1GB, UK; (R.J.); (A.J.V.E.)
| | - Anthony D. Kay
- Sport, Exercise & Life Sciences, University of Northampton, Northampton NN1 5PH, UK;
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, Karyes, 42100 Trikala, Greece;
| | - Alex J. Van Enis
- Department of Sport, Outdoor and Exercise Science, School of Human Sciences & Human Sciences Research Centre, University of Derby, Kedleston Road, Derby DE22 1GB, UK; (R.J.); (A.J.V.E.)
| | - Christos Kokkotis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece;
| | - Giannis Giakas
- Department of Physical Education and Sport Science, University of Thessaly, Karyes, 42100 Trikala, Greece;
| | - Minas A. Mina
- Department of Sport, Outdoor and Exercise Science, School of Human Sciences & Human Sciences Research Centre, University of Derby, Kedleston Road, Derby DE22 1GB, UK; (R.J.); (A.J.V.E.)
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Rosvoglou A, Fatouros IG, Poulios A, Tsatalas T, Papanikolaou K, Karampina E, Liakou CA, Tsimeas P, Karanika P, Tsoukas D, Katrabasas I, Chatzinikolaou A, Deli CK, Giakas G, Jamurtas AZ, Draganidis D. Recovery kinetics following eccentric exercise is volume-dependent. J Sports Sci 2023; 41:1326-1335. [PMID: 37864292 DOI: 10.1080/02640414.2023.2272101] [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: 06/28/2023] [Accepted: 10/11/2023] [Indexed: 10/22/2023]
Abstract
The present study compared the effect of 75 vs 150 vs 300 intensity-matched eccentric contractions on muscle damage and performance recovery kinetics. Ten healthy males participated in a randomized, cross-over study consisted of 4 experimental trials (ECC75, ECC150, ECC300 and Control - no exercise) with a 4-week washout period in-between. Performance and muscle damage, inflammatory and oxidative stress markers were evaluated at baseline, post-exercise, 24, 48 and 192 hours following each exercise protocol. Concentric and eccentric peak torque decreased similarly in ECC150 and ECC300 during the first 48 h of recovery (p < 0.05) but remained unaffected in ECC75. Countermovement jump indices decreased post-exercise and at 24 h in ECC150 and ECC300, with ECC300 inducing a more pronounced reduction (p < 0.05). Creatine kinase increased until 48 h of recovery in all trials and remained elevated up to 192 h only in ECC300 (p < 0.05). Delayed onset of muscle soreness increased, and knee-joint range of motion decreased in a volume-dependent manner during the first 48 h (p < 0.05). Likewise, a volume-dependent decline of glutathione and a rise of protein carbonyls was observed during the first 48 h of recovery (p < 0.05). Collectively, our results indicate that muscle damage and performance recovery following eccentric exercise is volume dependent, at least in lower limbs.
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Affiliation(s)
- Anastasia Rosvoglou
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Ioannis G Fatouros
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Athanasios Poulios
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | | | - Evaggeli Karampina
- Department of Physical Education and Sport Science, Democritus University of Thrace, Komotini, Greece
| | - Christina A Liakou
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Panagiotis Tsimeas
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Panagiota Karanika
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Dimitrios Tsoukas
- 5th Orthopaedic Clinic for Advanced Arthroscopic Sports and Regenerative Surgery, Mitera Hospital, Athens, Greece
| | | | - Athanasios Chatzinikolaou
- Department of Physical Education and Sport Science, Democritus University of Thrace, Komotini, Greece
| | - Chariklia K Deli
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Giannis Giakas
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Athanasios Z Jamurtas
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
| | - Dimitrios Draganidis
- Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
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Karpodini CC, Tsatalas T, Giannakopoulos I, Romare M, Giakas G, Tsaklis PV, Dinas PC, Haas AN, Papageorgiou SG, Angelopoulou E, Wyon MA, Koutedakis Y. The Effects of a Single Session of a Rhythmic Movement Program on Selected Biopsychological Parameters in PD Patients: A Methodological Approach. Medicina (Kaunas) 2023; 59:1408. [PMID: 37629698 PMCID: PMC10456488 DOI: 10.3390/medicina59081408] [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] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/20/2023] [Accepted: 07/29/2023] [Indexed: 08/27/2023]
Abstract
The aim of the present study is to examine the acute effects of a specially designed musicokinetic (MSK) program for patients with Parkinson's disease (PD) on (a) anxiety levels, (b) select kinematic and kinetic parameters, and (c) frontal cortex hemodynamic responses, during gait initiation and steady-state walking. Methods: This is a blind cross-over randomized control trial (RCT) in which 13 volunteers with PD will attend a 45 min MSK program under the following conditions: (a) a synchronous learning format and (b) an asynchronous remote video-based format. Changes in gait biomechanics and frontal cortex hemodynamic responses will be examined using a 10-camera 3D motion analysis (Vicon T-series, Oxford, UK), and a functional near-infrared spectroscopy (f-NIRS-Portalite, Artinis NL) system, respectively, while anxiety levels will be evaluated using the Hamilton Anxiety Rating Scale. Expected results: Guided by the rules of music, where periodicity is distinct, our specially designed MSK program may eventually be beneficial in improving motor difficulties and, hence, reducing anxiety. The combined implementation of f-NIRS in parallel with 3D gait analysis has yet to be evaluated in Parkinsonian patients following a MSK intervention. It is expected that the aforementioned intervention, through better rhythmicity, may improve the automatization of motor control, gait kinematics, and kinetics-supported by decreased frontal cortex hemodynamic activity-which may be linked to reduced anxiety levels.
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Affiliation(s)
- Claire Chrysanthi Karpodini
- Sport and Physical Activity Research Centre, Faculty of Education, Health and Wellbeing, University of Wolverhampton, Wolverhampton WV1 1LY, UK;
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, 421 00 Trikala, Greece; (T.T.); (P.V.T.)
| | - Ioannis Giannakopoulos
- Department of Physical Education and Sport Science, University of Thessaly, 421 00 Trikala, Greece; (T.T.); (P.V.T.)
| | - Mattias Romare
- Department of Physical Education and Sport Science, University of Thessaly, 421 00 Trikala, Greece; (T.T.); (P.V.T.)
| | - Giannis Giakas
- Department of Physical Education and Sport Science, University of Thessaly, 421 00 Trikala, Greece; (T.T.); (P.V.T.)
| | - Panagiotis V. Tsaklis
- Department of Physical Education and Sport Science, University of Thessaly, 421 00 Trikala, Greece; (T.T.); (P.V.T.)
- Department of Molecular Medicine and Surgery, Karolinska Institute, 171 65 Solna, Sweden
| | - Petros C. Dinas
- Department of Physical Education and Sport Science, University of Thessaly, 421 00 Trikala, Greece; (T.T.); (P.V.T.)
| | - Aline Nogueira Haas
- School of Physical Education Physiotherapy and Dance, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 91410-000, Brazil
| | - Sokratis G. Papageorgiou
- First Department of Neurology, Medical School, National and Kapodistrian University of Athens, Eginition University Hospital, 115 28 Athens, Greece
| | - Efthalia Angelopoulou
- First Department of Neurology, Medical School, National and Kapodistrian University of Athens, Eginition University Hospital, 115 28 Athens, Greece
| | - Matthew A. Wyon
- Sport and Physical Activity Research Centre, Faculty of Education, Health and Wellbeing, University of Wolverhampton, Wolverhampton WV1 1LY, UK;
| | - Yiannis Koutedakis
- Department of Physical Education and Sport Science, University of Thessaly, 421 00 Trikala, Greece; (T.T.); (P.V.T.)
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6
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Plakias S, Moustakidis S, Kokkotis C, Papalexi M, Tsatalas T, Giakas G, Tsaopoulos D. Identifying Soccer Players' Playing Styles: A Systematic Review. J Funct Morphol Kinesiol 2023; 8:104. [PMID: 37606399 PMCID: PMC10443261 DOI: 10.3390/jfmk8030104] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/20/2023] [Accepted: 07/25/2023] [Indexed: 08/23/2023] Open
Abstract
Identifying playing styles in football is highly valuable for achieving effective performance analysis. While there is extensive research on team styles, studies on individual player styles are still in their early stages. Thus, the aim of this systematic review was to provide a comprehensive overview of the existing literature on player styles and identify research areas required for further development, offering new directions for future research. Following the PRISMA guidelines for systematic reviews, we conducted a search using a specific strategy across four databases (PubMed, Scopus, Web of Science, and SPORTDiscus). Inclusion and exclusion criteria were applied to the initial search results, ultimately identifying twelve studies suitable for inclusion in this review. Through thematic analysis and qualitative evaluation of these studies, several key findings emerged: (a) a lack of a structured theoretical framework for player styles based on their positions within the team formation, (b) absence of studies investigating the influence of contextual variables on player styles, (c) methodological deficiencies observed in the reviewed studies, and (d) disparity in the objectives of sports science and data science studies. By identifying these gaps in the literature and presenting a structured framework for player styles (based on the compilation of all reported styles from the reviewed studies), this review aims to assist team stakeholders and provide guidance for future research endeavors.
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Affiliation(s)
- Spyridon Plakias
- Department of Physical Education and Sport Science, University of Thessaly, 38221 Trikala, Greece; (S.P.); (T.T.); (G.G.)
| | | | - Christos Kokkotis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece;
| | - Marina Papalexi
- Department of Operations, Technology, Events and Hospitality Management, Manchester Metropolitan University, Oxford Road, Manchester M15 6BH, UK;
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, 38221 Trikala, Greece; (S.P.); (T.T.); (G.G.)
| | - Giannis Giakas
- Department of Physical Education and Sport Science, University of Thessaly, 38221 Trikala, Greece; (S.P.); (T.T.); (G.G.)
| | - Dimitrios Tsaopoulos
- Center for Research and Technology Hellas, Institute for Bio-Economy & Agri-Technology, 60361 Volos, Greece;
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Lazaridis A, Syrmpas I, Tsatalas T, Krommidas C, Digelidis N. Adolescents' Out-of-School Physical Activity Levels and Well-Being during the COVID-19 Restrictions in Greece: A Longitudinal Study. J Funct Morphol Kinesiol 2023; 8:jfmk8020055. [PMID: 37218851 DOI: 10.3390/jfmk8020055] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/14/2023] [Accepted: 04/23/2023] [Indexed: 05/24/2023] Open
Abstract
The present study aimed to identify the impact of social distancing measures on adolescents' physical activity (PA) levels and well-being during the implementation of COVID-19 restrictive measures. There were 438 participants (207 boys and 231 girls), aged 12 to 15 years old (M = 13.5, SD = 0.55). They completed online questionnaires on well-being and PA in three waves (December 2020, February 2021, and June 2021). Correlation analyses were conducted to examine the relationship between well-being and PA variables in the three measurements. Additionally, separate three-way repeated-measures ANOVAs were conducted to capture possible differences in students' moderate to vigorous physical activity (MVPA) levels, life satisfaction, and subjective vitality among the three measurements due to gender, age, and interaction between gender and age. A significant relation emerged between the MVPA variables and well-being. In all measurements, adolescents' PA levels did not meet the World Health Organization (WHO) recommendations of at least 60 min per day in MVPA. Students' MVPA levels, life satisfaction, and subjective vitality were significantly higher in the third measurement compared to the first and second ones. Moreover, significant differences emerged in life satisfaction and subjective vitality between boys and girls in the first and third measurements, respectively. The COVID-19 restrictions appeared to negatively influence adolescents' PA and well-being. Policymakers aimed at facilitating adolescents' well-being in a similar situation in the future should not adopt measures restricting the participation of adolescents in PA.
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Affiliation(s)
- Alexandros Lazaridis
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
| | - Ioannis Syrmpas
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
| | - Charalampos Krommidas
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
| | - Nikolaos Digelidis
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
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Theodorou AA, Chatzinikolaou PN, Margaritelis NV, Christodoulou F, Tsatalas T, Paschalis V. Short-Term L-Citrulline Supplementation Does Not Affect Inspiratory Muscle Oxygenation and Respiratory Performance in Older Adults. Nutrients 2023; 15:nu15081951. [PMID: 37111169 PMCID: PMC10145540 DOI: 10.3390/nu15081951] [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: 03/23/2023] [Revised: 04/06/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
In sports nutrition, nitric oxide (NO•) precursors such as L-citrulline are widely used to enhance NO• bioavailability, which is considered an ergogenic aid. Our study aimed to examine the effect of short-term L-citrulline supplementation on respiratory muscles' performance, fatigue, and oxygenation in older adults. Fourteen healthy older males took 6 g of L-citrulline or a placebo for seven days in a double-blind crossover design. Pulmonary function via spirometry (i.e., forced expired volume in 1 s (FEV1), forced vital capacity (FVC), and their ratio)), fractional exhaled nitric oxide (NO•), maximal inspiratory pressure (MIP), rate of perceived exertion, and sternocleidomastoid muscle oxygenation (i.e., oxyhemoglobin (Δ[O2Hb]) and de-oxyhemoglobin (Δ[HHb]), total hemoglobin concentration (Δ[tHb]), and tissue saturation index (TSI%)) were evaluated at baseline, after seven days of L-citrulline supplementation, and after incremental resistive breathing to task failure of the respiratory muscles. The exhaled NO• value was only significantly increased after the supplementation (26% p < 0.001) in the L-citrulline condition. Pulmonary function, MIP, rate of perceived exertion, and sternocleidomastoid muscle oxygenation were not affected by the L-citrulline supplementation. In the present study, although short-term L-citrulline supplementation increased exhaled NO•, no ergogenic aids were found on the examined parameters at rest and after resistive breathing to task failure in older adults.
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Affiliation(s)
- Anastasios A Theodorou
- Department of Life Sciences, School of Sciences, European University Cyprus, 1516 Nicosia, Cyprus
| | - Panagiotis N Chatzinikolaou
- Department of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, 61122 Thessaloniki, Greece
| | - Nikos V Margaritelis
- Department of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, 61122 Thessaloniki, Greece
| | - Filippos Christodoulou
- Department of Life Sciences, School of Sciences, European University Cyprus, 1516 Nicosia, Cyprus
| | - Themistoklis Tsatalas
- Department of Life Sciences, School of Sciences, European University Cyprus, 1516 Nicosia, Cyprus
- Department of Physical Education & Sport Science, University of Thessaly, 42100 Trikala, Greece
| | - Vassilis Paschalis
- School of Physical Education and Sport Science, National and Kapodistrian University of Athens, 17237 Athens, Greece
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9
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Plakias S, Moustakidis S, Kokkotis C, Tsatalas T, Papalexi M, Plakias D, Giakas G, Tsaopoulos D. Identifying Soccer Teams' Styles of Play: A Scoping and Critical Review. J Funct Morphol Kinesiol 2023; 8:jfmk8020039. [PMID: 37092371 PMCID: PMC10123610 DOI: 10.3390/jfmk8020039] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/25/2023] Open
Abstract
Identifying and measuring soccer playing styles is a very important step toward a more effective performance analysis. Exploring the different game styles that a team can adopt to enable a great performance remains under-researched. To address this challenge and identify new directions in future research in the area, this paper conducted a critical review of 40 research articles that met specific criteria. Following the 22-item Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) guidelines, this scoping review searched for literature on Google Scholar and Pub Med database. The descriptive and thematic analysis found that the objectives of the identified papers can be classified into three main categories (recognition and effectiveness of playing styles and contextual variables that affect them). Critically reviewing the studies, the paper concluded that: (i) factor analysis seems to be the best technique among inductive statistics; (ii) artificial intelligence (AI) opens new horizons in performance analysis, and (iii) there is a need for further research on the effectiveness of different playing styles, as well as on the impact of contextual variables on them.
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Affiliation(s)
- Spyridon Plakias
- Department of Physical Education and Sport Science, University of Thessaly, Karyes, 42100 Trikala, Greece
| | | | - Christos Kokkotis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, Karyes, 42100 Trikala, Greece
| | - Marina Papalexi
- Department of Operations, Technology, Events and Hospitality Management, Manchester Metropolitan University, Oxford Road, Manchester M15 6BH, UK
| | | | - Giannis Giakas
- Department of Physical Education and Sport Science, University of Thessaly, Karyes, 42100 Trikala, Greece
| | - Dimitrios Tsaopoulos
- Institute for Bio-Economy & Agri-Technology, Center for Research and Technology Hellas, 60361 Volos, Greece
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10
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Papavasileiou A, Xenofondos A, Baudry S, Lapole T, Amiridis IG, Metaxiotis D, Tsatalas T, Patikas DA. Protocols Targeting Afferent Pathways via Neuromuscular Electrical Stimulation for the Plantar Flexors: A Systematic Review. Sensors (Basel) 2023; 23:2347. [PMID: 36850945 PMCID: PMC9967278 DOI: 10.3390/s23042347] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/02/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
This systematic review documents the protocol characteristics of studies that used neuromuscular electrical stimulation protocols (NMES) on the plantar flexors [through triceps surae (TS) or tibial nerve (TN) stimulation] to stimulate afferent pathways. The review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement, was registered to PROSPERO (ID: CRD42022345194) and was funded by the Greek General Secretariat for Research and Technology (ERA-NET NEURON JTC 2020). Included were original research articles on healthy adults, with NMES interventions applied on TN or TS or both. Four databases (Cochrane Library, PubMed, Scopus, and Web of Science) were systematically searched, in addition to a manual search using the citations of included studies. Quality assessment was conducted on 32 eligible studies by estimating the risk of bias with the checklist of the Effective Public Health Practice Project Quality Assessment Tool. Eighty-seven protocols were analyzed, with descriptive statistics. Compared to TS, TN stimulation has been reported in a wider range of frequencies (5-100, vs. 20-200 Hz) and normalization methods for the contraction intensity. The pulse duration ranged from 0.2 to 1 ms for both TS and TN protocols. It is concluded that with increasing popularity of NMES protocols in intervention and rehabilitation, future studies may use a wider range of stimulation attributes, to stimulate motor neurons via afferent pathways, but, on the other hand, additional studies may explore new protocols, targeting for more optimal effectiveness. Furthermore, future studies should consider methodological issues, such as stimulation efficacy (e.g., positioning over the motor point) and reporting of level of discomfort during the application of NMES protocols to reduce the inherent variability of the results.
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Affiliation(s)
- Anastasia Papavasileiou
- Laboratory of Neuromechanics, School of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, 62110 Serres, Greece
| | - Anthi Xenofondos
- Physical Education and Sports Sciences, Frederick University, 1036 Nicosia, Cyprus
| | - Stéphane Baudry
- Laboratory of Applied Biology, Research Unit in Applied Neurophysiology (LABNeuro), Université Libre de Bruxelles, 1070 Brussels, Belgium
| | - Thomas Lapole
- Université Jean Monnet Saint-Etienne, Lyon 1, Université Savoie Mont-Blanc, Laboratoire Interuniversitaire de Biologie de la Motricité, F-42023 Saint-Etienne, France
| | - Ioannis G. Amiridis
- Laboratory of Neuromechanics, School of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, 62110 Serres, Greece
| | | | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
| | - Dimitrios A. Patikas
- Laboratory of Neuromechanics, School of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, 62110 Serres, Greece
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11
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Kokkotis C, Chalatsis G, Moustakidis S, Siouras A, Mitrousias V, Tsaopoulos D, Patikas D, Aggelousis N, Hantes M, Giakas G, Katsavelis D, Tsatalas T. Identifying Gait-Related Functional Outcomes in Post-Knee Surgery Patients Using Machine Learning: A Systematic Review. Int J Environ Res Public Health 2022; 20:448. [PMID: 36612771 PMCID: PMC9819733 DOI: 10.3390/ijerph20010448] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/24/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Modern lifestyles require new tools for determining a person's ability to return to daily activities after knee surgery. These quantitative instruments must feature high discrimination, be non-invasive, and be inexpensive. Machine learning is a revolutionary approach that has the potential to satisfy the aforementioned requirements and bridge the knowledge gap. The scope of this study is to summarize the results of a systematic literature review on the identification of gait-related changes and the determination of the functional recovery status of patients after knee surgery using advanced machine learning algorithms. The current systematic review was conducted using multiple databases in accordance with the PRISMA guidelines, including Scopus, PubMed, and Semantic Scholar. Six out of the 405 articles met our inclusion criteria and were directly related to the quantification of the recovery status using machine learning and gait data. The results were interpreted using appropriate metrics. The results demonstrated a recent increase in the use of sophisticated machine learning techniques that can provide robust decision-making support during personalized post-treatment interventions for knee-surgery patients.
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Affiliation(s)
- Christos Kokkotis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece
| | - Georgios Chalatsis
- Department of Orthopedic Surgery, Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece
| | | | - Athanasios Siouras
- AIDEAS OÜ, 10117 Tallinn, Estonia
- Department of Computer Science and Biomedical Informatics, School of Science, University of Thessaly, 35131 Lamia, Greece
| | - Vasileios Mitrousias
- Department of Orthopedic Surgery, Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece
| | - Dimitrios Tsaopoulos
- Institute for Bio-Economy and Agri-Technology, Center for Research and Technology Hellas, 38333 Volos, Greece
| | - Dimitrios Patikas
- School of Physical Education and Sports Science at Serres, Aristotle University of Thessaloniki, 62110 Serres, Greece
| | - Nikolaos Aggelousis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece
| | - Michael Hantes
- Department of Orthopedic Surgery, Faculty of Medicine, University of Thessaly, 41500 Larissa, Greece
| | - Giannis Giakas
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
| | - Dimitrios Katsavelis
- Department of Exercise Science and Pre-Health Profession, Creighton University, Omaha, NE 68178, USA
| | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, 42100 Trikala, Greece
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12
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Kokkotis C, Giarmatzis G, Giannakou E, Moustakidis S, Tsatalas T, Tsiptsios D, Vadikolias K, Aggelousis N. An Explainable Machine Learning Pipeline for Stroke Prediction on Imbalanced Data. Diagnostics (Basel) 2022; 12:diagnostics12102392. [PMID: 36292081 PMCID: PMC9600473 DOI: 10.3390/diagnostics12102392] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 11/16/2022] Open
Abstract
Stroke is an acute neurological dysfunction attributed to a focal injury of the central nervous system due to reduced blood flow to the brain. Nowadays, stroke is a global threat associated with premature death and huge economic consequences. Hence, there is an urgency to model the effect of several risk factors on stroke occurrence, and artificial intelligence (AI) seems to be the appropriate tool. In the present study, we aimed to (i) develop reliable machine learning (ML) prediction models for stroke disease; (ii) cope with a typical severe class imbalance problem, which is posed due to the stroke patients’ class being significantly smaller than the healthy class; and (iii) interpret the model output for understanding the decision-making mechanism. The effectiveness of the proposed ML approach was investigated in a comparative analysis with six well-known classifiers with respect to metrics that are related to both generalization capability and prediction accuracy. The best overall false-negative rate was achieved by the Multi-Layer Perceptron (MLP) classifier (18.60%). Shapley Additive Explanations (SHAP) were employed to investigate the impact of the risk factors on the prediction output. The proposed AI method could lead to the creation of advanced and effective risk stratification strategies for each stroke patient, which would allow for timely diagnosis and the right treatments.
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Affiliation(s)
- Christos Kokkotis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece
| | - Georgios Giarmatzis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece
| | - Erasmia Giannakou
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece
| | | | - Themistoklis Tsatalas
- Department of Physical Education and Sport Science, University of Thessaly, 38221 Trikala, Greece
| | - Dimitrios Tsiptsios
- Department of Neurology, School of Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Konstantinos Vadikolias
- Department of Neurology, School of Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, 68100 Alexandroupolis, Greece
| | - Nikolaos Aggelousis
- Department of Physical Education and Sport Science, Democritus University of Thrace, 69100 Komotini, Greece
- Correspondence:
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13
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Kokkotis C, Moustakidis S, Tsatalas T, Ntakolia C, Chalatsis G, Konstadakos S, Hantes ME, Giakas G, Tsaopoulos D. Leveraging explainable machine learning to identify gait biomechanical parameters associated with anterior cruciate ligament injury. Sci Rep 2022; 12:6647. [PMID: 35459787 PMCID: PMC9026057 DOI: 10.1038/s41598-022-10666-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 04/11/2022] [Indexed: 11/09/2022] Open
Abstract
Anterior cruciate ligament (ACL) deficient and reconstructed knees display altered biomechanics during gait. Identifying significant gait changes is important for understanding normal and ACL function and is typically performed by statistical approaches. This paper focuses on the development of an explainable machine learning (ML) empowered methodology to: (i) identify important gait kinematic, kinetic parameters and quantify their contribution in the diagnosis of ACL injury and (ii) investigate the differences in sagittal plane kinematics and kinetics of the gait cycle between ACL deficient, ACL reconstructed and healthy individuals. For this aim, an extensive experimental setup was designed in which three-dimensional ground reaction forces and sagittal plane kinematic as well as kinetic parameters were collected from 151 subjects. The effectiveness of the proposed methodology was evaluated using a comparative analysis with eight well-known classifiers. Support Vector Machines were proved to be the best performing model (accuracy of 94.95%) on a group of 21 selected biomechanical parameters. Neural Networks accomplished the second best performance (92.89%). A state-of-the-art explainability analysis based on SHapley Additive exPlanations (SHAP) and conventional statistical analysis were then employed to quantify the contribution of the input biomechanical parameters in the diagnosis of ACL injury. Features, that would have been neglected by the traditional statistical analysis, were identified as contributing parameters having significant impact on the ML model’s output for ACL injury during gait.
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Affiliation(s)
- Christos Kokkotis
- Institute for Bio-Economy & Agri-Technology, Center for Research and Technology Hellas, 38333, Vólos, Greece. .,TEFAA, Department of Physical Education & Sport Science, University of Thessaly, 42100, Trikala, Greece.
| | | | - Themistoklis Tsatalas
- TEFAA, Department of Physical Education & Sport Science, University of Thessaly, 42100, Trikala, Greece
| | - Charis Ntakolia
- Hellenic National Center of COVID-19 Impact on Youth, University Mental Health Research Institute, 11527, Athens, Greece.,School of Naval Architecture and Marine Engineering, National Technical University of Athens, 15772, Athens, Greece
| | - Georgios Chalatsis
- Department of Orthopaedic Surgery and Musculoskeletal Trauma, Faculty of Medicine, School of Health Sciences, University General Hospital of Larissa, 41110, Larissa, Greece
| | | | - Michael E Hantes
- Department of Orthopaedic Surgery and Musculoskeletal Trauma, Faculty of Medicine, School of Health Sciences, University General Hospital of Larissa, 41110, Larissa, Greece
| | - Giannis Giakas
- TEFAA, Department of Physical Education & Sport Science, University of Thessaly, 42100, Trikala, Greece
| | - Dimitrios Tsaopoulos
- Institute for Bio-Economy & Agri-Technology, Center for Research and Technology Hellas, 38333, Vólos, Greece
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14
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Theofilidis G, Bogdanis GC, Stavropoulos‐Kalinoglou A, Krase AA, Tsatalas T, Shum G, Sakkas GK, Koutedakis Y, Karatzaferi C. The effects of training with high-speed interval running on muscle performance are modulated by slope. Physiol Rep 2021; 9:e14656. [PMID: 33400851 PMCID: PMC7785049 DOI: 10.14814/phy2.14656] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 11/01/2020] [Indexed: 12/02/2022] Open
Abstract
We examined changes in selected muscle performance parameters after 8 weeks of interval training using two opposite running inclinations. We hypothesized that the uphill training will affect endurance muscle performance outcomes, whereas the downhill training will affect power muscle performance outcomes. Fourteen physically active volunteers were randomly assigned into either the Uphill group (UG; n = 7; uphill interval running at +10% incline) or the Downhill group (DG; n = 7; downhill interval running at -10% incline) and completed 16 training sessions. Each session consisted of ten 30 s treadmill runs at 90% of maximum aerobic speed (MAS) with a work to rest ratio of 1:2. Vertical jump performance, isometric (MVC) and isokinetic torque of knee extensors and flexors, and fatigue of knee extensors were evaluated pre and post-training. Moreover, body composition (via bioimpedance) and vastus lateralis muscle architecture (via ultrasonography) were assessed pre and post-training. Relative lean tissue mass, relative fat mass, and squat jump (cm) significantly (p < .05) changed from baseline values by +4.5 ± 4.0%, -11.5 ± 9.6%, and +9.5 ± 11.7%, respectively, only in the DG. Similarly, DG improved absolute values of knee extension rate of torque development and impulse (p < .05), whereas knee flexion peak torque angle significantly decreased in both groups (p < .05). On the other hand, the UG increased the number of repetitions achieved during the fatigue protocol and total work by 21.2 ± 32.6% and 13.8 ± 21.2%, respectively (p < .05). No differences were found between groups in muscle architecture. Introducing variations in slope during HIIT could be used to induce specific improvements toward muscle endurance or power performance characteristics.
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Affiliation(s)
- George Theofilidis
- Experimental Physiology & Therapeutic Exercise LaboratoryMuscle Physiology and Mechanics GroupCREHPSchool of Physical Education Sports Science and NutritionUniversity of ThessalyTrikalaGreece
| | - Gregory C. Bogdanis
- School of Physical Education and Sports ScienceNational and Kapodistrian University of AthensDafniGreece
| | - Antonios Stavropoulos‐Kalinoglou
- Experimental Physiology & Therapeutic Exercise LaboratoryMuscle Physiology and Mechanics GroupCREHPSchool of Physical Education Sports Science and NutritionUniversity of ThessalyTrikalaGreece
- Carnegie School of SportLeeds Beckett UniversityLeedsUK
| | - Argyro A. Krase
- Experimental Physiology & Therapeutic Exercise LaboratoryLIVE groupCREHPSchool of Physical Education Sports Science and NutritionUniversity of ThessalyTrikalaGreece
| | | | - Gary Shum
- Plymouth Marjon UniversityPlymouthUK
| | - Giorgos K. Sakkas
- Experimental Physiology & Therapeutic Exercise LaboratoryLIVE groupCREHPSchool of Physical Education Sports Science and NutritionUniversity of ThessalyTrikalaGreece
- Cardiff Metropolitan UniversityCardiffUK
| | - Yiannis Koutedakis
- Experimental Physiology & Therapeutic Exercise LaboratoryMuscle Physiology and Mechanics GroupCREHPSchool of Physical Education Sports Science and NutritionUniversity of ThessalyTrikalaGreece
- Faculty of ArtsUniversity of WolverhamptonWolverhamptonUK
| | - Christina Karatzaferi
- Experimental Physiology & Therapeutic Exercise LaboratoryMuscle Physiology and Mechanics GroupCREHPSchool of Physical Education Sports Science and NutritionUniversity of ThessalyTrikalaGreece
- Plymouth Marjon UniversityPlymouthUK
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15
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Pappa E, Koutedakis Y, Sideris V, Tsatalas T, Giakas G. Upper-Body Posture in Adolescent Pianists: A Cross-Sectional Study. Med Probl Perform Art 2020; 35:202-207. [PMID: 33257922 DOI: 10.21091/mppa.2020.4030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 08/16/2020] [Indexed: 06/12/2023]
Abstract
AIMS Although the significance of upper-body posture in relation to piano performance has often been highlighted, the role of experience remains unclear. The aim of this study was to examine selected upper body posture parameters in adolescent piano students of different performance level (beginners vs advanced). METHODS Thirteen (13) adolescent piano students (14.7±0.5 yrs; 7 beginners and 6 advanced) volunteered. They all performed two specific major scales (G-major and E-major) in five octaves in two predetermined different tempi (slow and fast). An upper body biomechanical model consisting of 27 reflective markers was applied on specific bony landmarks. A 10-T camera Vicon system running Nexus 2 was employed to capture upper body motion--a) sway of the trunk in relation to the instrument, b) finger/hand sway over the keyboard, c) overall hand movement, and d) spinal angles--at selected moments of four different performances. RESULTS Beginners demonstrated more trunk sway than their advanced counterparts (p<0.05), more finger/hand sway (p<0.05), more overall hand movement (p<0.05), and more flexed spinal angles at the start of their performance (p<0.05). Most of these differences appeared in the G-fast performances, whereas the G-slow equivalents revealed no differences. CONCLUSION Less-experienced piano players are characterized by more movement in their trunk posture and more upper limb activity than their more advanced colleagues. Future research should examine whether interventional programs designed to alter upper-body posture would have beneficial effects in piano performance.
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Affiliation(s)
| | - Yannis Koutedakis
- Dep. of Physical Education and Sport Sciences, University of Thessaly, Karies, 42100 Trikala Greece. Tel +302431047056.
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16
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Mina MA, Blazevich AJ, Tsatalas T, Giakas G, Seitz LB, Kay AD. Variable, but not free-weight, resistance back squat exercise potentiates jump performance following a comprehensive task-specific warm-up. Scand J Med Sci Sports 2018; 29:380-392. [PMID: 30468526 DOI: 10.1111/sms.13341] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 08/17/2018] [Revised: 11/07/2018] [Accepted: 11/14/2018] [Indexed: 11/29/2022]
Abstract
Studies examining acute, high-speed movement performance enhancement following intense muscular contractions (frequently called "post-activation potentiation"; PAP) often impose a limited warm-up, compromizing external validity. In the present study, the effects on countermovement vertical jump (CMJ) performance of back squat exercises performed with or without elastic bands during warm-up were compared. After familiarization, fifteen active men visited the laboratory on two occasions under randomized, counterbalanced experimental squat warm-up conditions: (a) free-weight resistance (FWR) and (b) variable resistance (VR). After completing a comprehensive task-specific warm-up, three maximal CMJs were performed followed by three back squat repetitions completed at 85% of 1-RM using either FWR or VR Three CMJs were then performed 30 seconds, 4 minutes, 8 minutes, and 12 minutes later. During CMJ trials, hip, knee, and ankle joint kinematics, ground reaction force data and vastus medialis, vastus lateralis, and gluteus maximus electromyograms (EMG) were recorded simultaneously using 3D motion analysis, force platform, and EMG techniques, respectively. No change in any variable occurred after FWR (P > 0.05). Significant increases (P < 0.05) were detected at all time points following VR in CMJ height (5.3%-6.5%), peak power (4.4%-5.9%), rate of force development (12.9%-19.1%), peak concentric knee angular velocity (3.1%-4.1%), and mean concentric vastus lateralis EMG activity (27.5%-33.4%). The lack of effect of the free-weight conditioning contractions suggests that the comprehensive task-specific warm-up routine mitigated any further performance augmentation. However, the improved CMJ performance following the use of elastic bands is indicative that specific alterations in force-time properties of warm-up exercises may further improve performance.
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Affiliation(s)
- Minas A Mina
- Human Sciences Research Centre, University of Derby, Derby, UK
| | - Anthony J Blazevich
- Centre for Exercise and Sports Science Research, School of Medical & Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Themistoklis Tsatalas
- Department of Physical Education & Sport Science, University of Thessaly, Volos, Greece
| | - Giannis Giakas
- Department of Physical Education & Sport Science, University of Thessaly, Volos, Greece
| | - Laurent B Seitz
- Centre for Exercise and Sports Science Research, School of Medical & Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Anthony D Kay
- Sport, Exercise & Life Sciences, University of Northampton, Northampton, UK
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17
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Lazaridis S, Patikas DA, Bassa E, Tsatalas T, Hatzikotoulas K, Ftikas C, Kotzamanidis C. The acute effects of an intense stretch-shortening cycle fatigue protocol on the neuromechanical parameters of lower limbs in men and prepubescent boys. J Sports Sci 2017; 36:131-139. [PMID: 28282755 DOI: 10.1080/02640414.2017.1287932] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The study examined the differences between boys and adults after an intense stretch-shortening cycle fatigue protocol on neuromechanical parameters of the lower limb. Thirteen boys (9-11 years old) and 13 adult men (22-28 years old) were tested for maximal isometric voluntary knee extension torque and drop jump (DJ) performance from 30 cm before and immediately after a fatigue protocol, consisted of 10 × 10 maximum effort vertical jumps. Three-dimensional kinematics, kinetics and electromyographic (EMG) parameters of the lower extremities muscles were recorded during DJs before and after the fatigue test. The results indicated that reduction in maximal isometric torque and jumping performance was significantly higher in adults compared to boys. Vertical ground reaction forces, contact time and maximum knee flexion increased in a greater extend in adults than in boys. In addition, preactivation, EMG agonist activity, knee joint stiffness and stretch reflex decreased more in adults than in boys at all the examined phases of jumping tasks. It is concluded that employed fatigue protocol induced acute reduction in performance and altered motor control during jumping in both age groups. However, the differences in the level of fatigue between the 2 groups could be attributed to neuromuscular, mechanical and kinematic parameters observed between groups.
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Affiliation(s)
- Savvas Lazaridis
- a School of Physical Education and Sport Science , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Dimitrios A Patikas
- a School of Physical Education and Sport Science , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Eleni Bassa
- a School of Physical Education and Sport Science , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Themistoklis Tsatalas
- b Center for Research and Technology , Institute for Research and Technology Thessaly , Trikala , Greece.,c School of Physical Education and Sport Science , University of Thessaly , Trikala , Greece
| | - Konstantinos Hatzikotoulas
- a School of Physical Education and Sport Science , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Christos Ftikas
- a School of Physical Education and Sport Science , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Christos Kotzamanidis
- a School of Physical Education and Sport Science , Aristotle University of Thessaloniki , Thessaloniki , Greece
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Tsatalas T, Giakas G, Spyropoulos G, Sideris V, Kotzamanidis C, Koutedakis Y. Walking kinematics and kinetics following eccentric exercise-induced muscle damage. J Electromyogr Kinesiol 2013; 23:1229-36. [PMID: 23688777 DOI: 10.1016/j.jelekin.2013.04.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 08/06/2012] [Revised: 04/09/2013] [Accepted: 04/16/2013] [Indexed: 11/18/2022] Open
Abstract
The goal of this investigation was to investigate how walking patterns are affected following muscle-damaging exercise by quantifying both lower limb kinematics and kinetics. Fifteen young women conducted a maximal isokinetic eccentric exercise (EE) muscle damage protocol (5×15) of the knee extensors and flexors of both legs at 60°/s. Three-dimensional motion data and ground reaction forces (GRFs) were collected 24h pre-EE while the participants walked at their preferred self-selected walking speed (SWS). Participants were asked to perform two gait conditions 48h post-EE. The first condition (COND1) was to walk at their own speed and the second condition (COND2) to maintain the SWS (±5%) they had 24h pre-EE. Walking speed during COND1 was significantly lower compared to pre-exercise values. When walking speed was controlled during COND2, significant effects of muscle damage were noticed, among other variables, for stride frequency, loading rate, lateral and vertical GRFs, as well as for specific knee kinematics and kinetics. These findings provide new insights into how walking patterns are adapted to compensate for the impaired function of the knee musculature following muscle damage. The importance to distinguish the findings caused by muscle damage from those exhibited in response to changes in stride frequency is highlighted.
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Spyropoulos G, Tsatalas T, Tsaopoulos DE, Sideris V, Giakas G. Biomechanics of sit-to-stand transition after muscle damage. Gait Posture 2013; 38:62-7. [PMID: 23164757 DOI: 10.1016/j.gaitpost.2012.10.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 10/16/2012] [Accepted: 10/23/2012] [Indexed: 02/02/2023]
Abstract
The purpose of the study was to examine the effects of exercise-induced muscle damage on the biomechanics of the sit-to-stand transition (STST). Seventeen volunteers participated in an intense, eccentric based, muscle damage protocol of knee flexors and extensors via an isokinetic dynamometer. Kinematic and kinetic data were collected using a 10-camera optoelectronic system and a force plate 24h before and 48h after exercise. Statistical analysis showed significant differences in kinematic and kinetic parameters after exercise. Forty-eight hours after exercise, the strategy did change and the knee joint relative effort level increased significantly. Pelvic and hip kinematics, in conjunction with the knee extension joint moment, provided an efficient mechanism to support the participants' locomotor system during the STST. These results may be of great significance in designing supportive devices, as well as composing rehabilitation programs for young or elderly individuals, with various musculoskeletal pathologies.
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Affiliation(s)
- Giannis Spyropoulos
- Lab of Human Performance and Rehabilitation, Center for Research and Technology, Thessaly, Trikala, Greece; Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece
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Tsatalas T, Giakas G, Spyropoulos G, Sideris V, Lazaridis S, Kotzamanidis C, Koutedakis Y. The effects of eccentric exercise-induced muscle damage on running kinematics at different speeds. J Sports Sci 2012; 31:288-98. [PMID: 23046390 DOI: 10.1080/02640414.2012.729135] [Citation(s) in RCA: 13] [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: 01/08/2023]
Abstract
This study investigated the effects of knee localised muscle damage on running kinematics at varying speeds. Nineteen young women (23.2 ± 2.8 years; 164 ± 8 cm; 53.6 ± 5.4 kg), performed a maximal eccentric muscle damage protocol (5 × 15) of the knee extensors and flexors of both legs at 60 rad · s(-1). Lower body kinematics was assessed during level running on a treadmill at three speeds pre- and 48 h after. Evaluated muscle damage indices included isometric torque, muscle soreness and serum creatine kinase activity. The results revealed that all indices changed significantly after exercise, indicating muscle injury. Step length decreased and stride frequency significantly increased 48 h post-exercise only at the fastest running speed (3 m · s(-1)). Support time and knee flexion at toe-off increased only at the preferred transition speed and 2.5 m · s(-1). Knee flexion at foot contact, pelvic tilt and obliquity significantly increased, whereas hip extension during stance-phase, knee flexion during swing-phase, as well as knee and ankle joints range of motion significantly decreased 48 h post-exercise at all speeds. In conclusion, the effects of eccentric exercise of both knee extensors and flexors on particular tempo-spatial parameters and knee kinematics of running are speed-dependent. However, several pelvic and lower joint kinematics present similar behaviour at the three running speeds examined. These findings provide new insights into how running kinematics at different speeds are adapted to compensate for the impaired function of the knee musculature following muscle damage.
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Affiliation(s)
- Themistoklis Tsatalas
- Institute of Human Performance and Rehabilitation, Centre for Research and Technology, Trikala, Greece
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Tsarouhas A, Iosifidis M, Spyropoulos G, Kotzamitelos D, Tsatalas T, Giakas G. Tibial rotation under combined in vivo loading after single- and double-bundle anterior cruciate ligament reconstruction. Arthroscopy 2011; 27:1654-62. [PMID: 21937193 DOI: 10.1016/j.arthro.2011.06.028] [Citation(s) in RCA: 14] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 06/18/2011] [Accepted: 06/20/2011] [Indexed: 02/02/2023]
Abstract
PURPOSE To evaluate in vivo the differences in tibial rotation between single- and double-bundle anterior cruciate ligament (ACL)-reconstructed knees under combined loading conditions. METHODS An 8-camera optoelectronic system and a force plate were used to collect kinematic and kinetic data from 14 patients with double-bundle ACL reconstruction, 14 patients with single-bundle reconstruction, 12 ACL-deficient subjects, and 12 healthy control individuals while performing 2 tasks. The first included walking, 60° pivoting, and stair ascending, and the second included stair descending, 60° pivoting, and walking. The 2 variables evaluated were the maximum range of internal-external tibial rotation and the maximum knee rotational moment. RESULTS Tibial rotation angles were not significantly different across the 4 groups (P = .331 and P = .851, respectively) or when side-to-side differences were compared within groups (P = .216 and P = .371, respectively) for the ascending and descending maneuvers, nor were rotational moments among the 4 groups (P = .418 and P = .290, respectively). Similarly, for the descending maneuver, the rotational moments were not significantly different between sides (P = .192). However, for the ascending maneuver, rotational moments of the affected sides were significantly lower by 20.5% and 18.7% compared with their intact counterparts in the single-bundle (P = .015) and double-bundle (P = .05) groups, respectively. CONCLUSIONS High-intensity activities combining stair ascending or descending with pivoting produce similar tibial rotation in single- and double-bundle ACL-reconstructed patients. During such maneuvers, the reconstructed knee may be subjected to significantly lower rotational loads compared with the intact knee. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
- Alexander Tsarouhas
- Department of Physical Education and Sports Science, University of Thessaly, Trikala, Greece.
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Tsatalas T, Giakas G, Spyropoulos G, Paschalis V, Nikolaidis MG, Tsaopoulos DE, Theodorou AA, Jamurtas AZ, Koutedakis Y. The effects of muscle damage on walking biomechanics are speed-dependent. Eur J Appl Physiol 2010; 110:977-88. [DOI: 10.1007/s00421-010-1589-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2010] [Indexed: 10/19/2022]
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Tsarouhas A, Iosifidis M, Kotzamitelos D, Spyropoulos G, Tsatalas T, Giakas G. Three-dimensional kinematic and kinetic analysis of knee rotational stability after single- and double-bundle anterior cruciate ligament reconstruction. Arthroscopy 2010; 26:885-93. [PMID: 20620787 DOI: 10.1016/j.arthro.2009.11.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2009] [Revised: 11/15/2009] [Accepted: 11/16/2009] [Indexed: 02/02/2023]
Abstract
PURPOSE To investigate whether anatomic restoration of the anterior cruciate ligament (ACL) functional bundles results in significant reduction in transverse-plane instability compared with the conventional single-bundle technique during a dynamic 60 degrees pivoting maneuver with the supporting knee in extension. METHODS Using an 8-camera optoelectronic system and a force plate, we examined 10 patients with double-bundle ACL reconstruction, 12 patients with single-bundle reconstruction, 10 ACL-deficient subjects, and 10 healthy control individuals. The 4 groups did not differ in terms of age, body mass index, duration of follow-up, and number of meniscectomies performed. Kinematic and kinetic data were collected from these subjects while performing a pivoting maneuver on each side with the supporting knee in extension. Maximum range of motion for internal-external knee rotation and maximum knee rotational moment were examined. RESULTS There was no significant difference in tibial rotation either between the 4 groups or between sides. The mean knee rotation for the single- and double-bundle groups was lower than the control group. Rotational moment values were substantially reduced on the affected side of the reconstructed and the ACL-deficient groups. However, rotational moment was not found to affect the degree of angular displacement significantly. CONCLUSIONS Double-bundle ACL reconstruction does not reduce knee rotation further compared with the single-bundle reconstruction technique. The affected side of ACL-deficient or -reconstructed individuals is subjected to reduced knee rotational moments compared with the intact side during stressful functional maneuvers. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
- Alexander Tsarouhas
- Department of Physical Education and Sports Science, University of Thessaly, Karyes, Trikala, Greece.
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