Article
Biology
Jose Priego-Quesada, Marcio F. Goethel, Klaus Magno Becker, Ricardo J. Fernandes, Joao Paulo Vilas-Boas
Summary: This tutorial paper describes the methodology and examples of surface electromyography decomposition to teach the concept of motor unit recruitment. This technique can facilitate the introduction of theoretical content in practical classes for physiology and biomechanics academics.
Article
Sport Sciences
Gennaro Boccia, Samuel D'Emanuele, Paolo Riccardo Brustio, Alberto Rainoldi, Federico Schena, Cantor Tarperi
Summary: The study aimed to isolate the fatigue effect of contraction rapidity. The findings indicate that the decrease in net neural drive is the main cause of the reduction in RFD, especially within the first 50 ms of muscle contraction.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2023)
Article
Sport Sciences
Antoine Chatrenet, Giorgina Piccoli, Agathe Anthierens, Massimo Torreggiani, Jean Michel Audebrand, Baptiste Morel, Bruno Beaune, Sylvain Durand
Summary: This study found that CKD patients experience a high degree of fatigue related to neuromuscular symptoms, but there is limited evidence regarding the underlying cause of neuromuscular fatigability in elderly CKD patients.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2023)
Article
Chemistry, Analytical
Lorenz Kahl, Ulrich G. Hofmann
Summary: This study investigates methods for elimination of cardiogenic artifacts in respiratory sEMG signals and compares their performance in fatigue detection with different algorithms. The TSWD method showed superior results in fatigue detection across different levels of artifact contamination, with SMR5 being determined as the best fatigue detection algorithm.
Article
Medicine, General & Internal
Joaquin Calatayud, Jonathan Martin-Cuesta, Juan J. Carrasco, Sofia Perez-Alenda, Carlos Cruz-Montecinos, Lars L. Andersen, Felipe Querol-Giner, Jose Casana
Summary: Severe hemophilia patients undergoing knee extensions to failure with adequate prophylactic treatment can achieve good neuromuscular responses without increasing fear of movement or adverse effects.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Sport Sciences
Justine R. Magnuson, Hogun J. Kang, Mathew I. B. Debenham, Chris J. McNeil, Brian H. Dalton
Summary: Sleep deprivation increases perception of fatigue, effort, and task difficulty, but does not affect the development and recovery of performance fatigability. Following a sustained, submaximal isometric task, sleep deprivation exacerbates the disconnect between perceived and actual neuromuscular capacity.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2023)
Article
Biophysics
Maryam Mashayekhi, Majid M. Moghaddam
Summary: This study presents a self-adapting control method based on online fatigue detection for upper-limb rehabilitation therapy. Experimental tests validate the feasibility of the method and compare the performance differences between two control methods. Simulations further confirm the effectiveness of the proposed method in stroke patients' rehabilitation.
JOURNAL OF BIOMECHANICS
(2022)
Article
Nutrition & Dietetics
Wael Daab, Firas Zghal, George P. Nassis, Haithem Rebai, Wassim Moalla, Mohamed Amine Bouzid
Summary: The aim of this study was to assess the impact of beetroot juice supplementation on neuromuscular fatigue during simulated soccer matches. The results showed that chronic beetroot juice supplementation can attenuate neuromuscular fatigue and improve physical performance.
APPLIED PHYSIOLOGY NUTRITION AND METABOLISM
(2023)
Article
Cell Biology
Petra Hyrossova, Marc Arago, Cristina Munoz-Pinedo, Francesc Vinals, Pablo M. Garcia-Roves, Carmen Escolano, Andres Mendez-Lucas, Jose C. Perales
Summary: Under glucose restriction, cells undergo entosis, a cannibalistic process, to withstand metabolic stress. Reduced protein glycosylation and the involvement of PEPCK-M in this survival program play crucial roles. These findings have implications for tumor metabolism and treatment strategies.
CELL DEATH & DISEASE
(2022)
Article
Sport Sciences
Camilla Martignon, Fabio Giuseppe Laginestra, Gaia Giuriato, Anna Pedrinolla, Chiara Barbi, Ilaria Antonella Di Vico, Michele Tinazzi, Federico Schena, Massimo Venturelli
Summary: This study investigated the interaction between central and peripheral components of neuromuscular fatigue in patients with Parkinson's disease (PD) compared with healthy controls. The results showed that central neuromuscular fatigue was exacerbated in PD patients, while peripheral fatigue did not differ significantly. This suggests that physical activity may limit fatigue and counterbalance the degenerative effects of PD through peripheral adaptations.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2022)
Article
Multidisciplinary Sciences
Hiroshi Shinohara, Ryota Hosomi, Ryuji Sakamoto, Toshiya Urushihata, Shione Yamamoto, Chikashi Higa, Shinpei Oyama
Summary: This study aimed to determine whether a low-tremor side-bridge exercise for 4 weeks improves bow tremor during archery movements. The intervention group performed low-tremor side bridges for 4 weeks. The intervention reduced bow tremor and the median power frequency of the middle deltoid.
Article
Medicine, General & Internal
Joaquin Calatayud, Rodrigo Torres-Castro, Roberto Vera-Uribe, Alvaro Olivares-Valenzuela, Benjamin Guzman-Gonzalez, Maria E. Torres, Nicolas Sepulveda-Caceres, Lars L. L. Andersen, Carlos Cruz-Montecinos
Summary: The study found that heavy elastic resistance exercise is feasible in COPD patients without excessive dyspnea and with a stable cardiorespiratory response. At least two elastic resistance increments are needed to enhance muscle activity for the vastus lateralis and rectus femoris, while there is no increase for the vastus medialis. These results may help in individualizing exercise dosing during elastic resistance training in patients with COPD.
FRONTIERS IN MEDICINE
(2022)
Article
Geriatrics & Gerontology
Paulo Cezar Rocha dos Santos, Claudine J. C. Lamoth, Lilian Teresa Bucken Gobbi, Inge Zijdewind, Fabio Augusto Barbieri, Tibor Hortobagyi
Summary: The study compared muscle activation patterns of older and younger adults during repetitive sit-to-stand tasks, finding that older adults activated certain muscles more, earlier, and for longer duration. Despite completing fewer STS trials, older adults reported similar perceived exertion levels as younger adults. Maximum voluntary isometric knee extension force decreased at the end of the task, with similar declines in muscle activation levels across different age groups.
FRONTIERS IN AGING NEUROSCIENCE
(2021)
Article
Engineering, Biomedical
Robert M. Hinson, Joseph Berman, I-Chieh Lee, William G. Filer, He Huang
Summary: There is controversy over the value of offline evaluation of EMG-based neural-machine interfaces (NMIs) for their real-time application. This study aimed to investigate the relationship between the offline decoding accuracy of EMG-based NMIs and user adaptation, cognitive load, and physical effort in real-time NMI use. Results showed that high-level offline performance decoders yield the fastest adaptation rate and highest posture matching completion rate with the least muscle effort in users during online testing.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2023)
Article
Neurosciences
Joshua C. Carr, Michael G. Bemben, Matt S. Stock, Jason M. DeFreitas
Summary: The study showed that illusionary mirror visual feedback can influence contraction-dependent fatigue during maximal handgrip contractions, and attenuates the difference in relative fatigability between bimanual and unimanual contractions. Additionally, the mirror illusion reduces unintended EMG activity in the contralateral forearm during unimanual contraction.
JOURNAL OF NEUROPHYSIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Irena Zagranyarska, Kalina Kostova, Yulian Zagranyarski, Rositsa Nikolova, Boris Shivachev, Vladimir Dimitrov
MOLECULAR DIVERSITY
(2020)
Article
Chemistry, Organic
Maya Marinova, Simon Pascal, Laure Guenee, Celine Besnard, Boris Shivachev, Kalina Kostova, Claudio Villani, Roberta Franzini, Vladimir Dimitrov, Jerome Lacour
JOURNAL OF ORGANIC CHEMISTRY
(2020)
Article
Biotechnology & Applied Microbiology
Amina Maalej, Wiem Elloumi, Ivan Angelov, Proletina Kardaleva, Vladimir Dimitrov, Mohamed Chamkha, Maya Guncheva, Sami Sayadi
Summary: In this study, pure compounds including Quercitrin and Loliolid were successfully isolated from the distilled leaves of Pistacia lentiscus. Quercitrin showed stronger inhibitory effects on enzyme activity and fibril formation compared to Loliolid, indicating its potential for commercial application in cosmeceuticals and nutraceuticals. The binding mode of Quercitrin and Loliolid to Bovine Serum Albumin was also characterized as a static process with conformational changes in BSA.
FOOD AND BIOPRODUCTS PROCESSING
(2021)
Article
Chemistry, Inorganic & Nuclear
Martin Ravutsov, Georgi M. Dobrikov, Miroslav Dangalov, Rositsa Nikolova, Vladimir Dimitrov, Giuseppe Mazzeo, Giovanna Longhi, Sergio Abbate, Lorenzo Paoloni, Marco Fuse, Vincenzo Barone
Summary: A series of 1,2-disubstituted planar chiral ferrocenes were successfully synthesized through ortho-directed lithiation of chiral ferrocenesulfonamides and reaction with electrophilic reactants. The relative configurations of chemical groups were determined by NMR experiments and X-ray crystallography, while experimental ECD and VCD spectra were recorded and interpreted using quantum chemical computations.
Article
Computer Science, Information Systems
Nikolay Hinov, Vladimir Dimitrov, Gergana Vacheva
Summary: Smart integration of electric forms of transport is crucial for a greener future, with technologies like Vehicle to Home playing a key role. This paper presents a modified Vehicle to Home system incorporating a stationary battery pack, and optimized models for household consumption and energy control processes.
Article
Chemistry, Analytical
Amandine Dispas, Adrian Clarke, Alexandre Grand-Guillaume Perrenoud, Luca Gioacchino Losacco, Jean-Luc Veuthey, Quentin Gros, Jeremy Molineau, Angeline Noireau, Caroline West, Fabio Salafia, Mariosimone Zoccali, Luigi Mondello, Amber Guillen, Jenny Wang, Kelly Zhang, Philipp Jochems, Gesa Schad, Kosuke Nakajima, Shinnosuke Horie, Jan Joseph, Maria Kristina Parr, Pierre Billemont, Antoni Severino, Sonja Schneider, Edgar Naegele, Daniel Kutscher, Rick Wikfors, Regina Black, Lee Ingvaldson, Jimmy Oliveira Da Silva, Raffeal Bennett, Erik L. Regalado, Thi Phuong Thuy Hoang, David Touboul, Yana Nikolova, Mariana Kamenova-Nacheva, Vladimir Dimitrov, Blair K. Berger, Kevin A. Schug, Solene Kerviel-Guillon, Fabien Mauge, Masatomo Takahashi, Yoshihiro Izumi, Takeshi Bamba, Florent Rouviere, Sabine Heinisch, Davy Guillarme, Philippe Hubert
Summary: The study evaluated the transferability and reproducibility of pharmaceutical impurity analysis using supercritical fluid chromatography (SFC) across different instrument brands. Results showed significant reproducibility differences between instruments, but overall reproducibility was comparable to LC methods.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Irena Zagranyarska, Kalina Kostova, Krasimira Dikova, Boris Shivachev, Vladimir Dimitrov
Summary: Chiral aminomethylnaphthols have been synthesized using steroidal 2-naphthol analogue prepared from estrone via three-component `Betti condensation. By choosing appropriate aldehyde and chiral amine components, structurally diverse aminomethylnaphthols could be obtained. The absolute configurations of the synthesized aminomethylnaphthols were determined using advanced NMR experiments and confirmed by X-ray crystallography. These chiral steroidal aminomethylnaphthols showed good catalytic activity in the enantioselective addition of diethylzinc to aldehydes.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Elena Nikolova, Vladimir Dimitrov, Tsveti Hranov, Elitsa Gieva
Summary: This article describes and analyzes a system for remote monitoring of ECG signal using textile electrodes. The system allows for long-term online monitoring and can be used during the daily activities of patients, as well as for tracking patients during transportation or remote access.
2022 45TH INTERNATIONAL SPRING SEMINAR ON ELECTRONICS TECHNOLOGY (ISSE)
(2022)
Proceedings Paper
Computer Science, Theory & Methods
Vladimir G. Dimitrov, Alexander G. Dimitrov
Summary: Intensive muscle contractions can cause metabolic changes that affect intracellular resistivity and subsequently influence the propagation and length of intracellular action potentials (IAPs), as well as the amplitude of extracellular potentials (EPs). These findings are important for analyzing changes in M-waves during and after muscle activity.
CONTEMPORARY METHODS IN BIOINFORMATICS AND BIOMEDICINE AND THEIR APPLICATIONS
(2022)
Article
Multidisciplinary Sciences
Antoaneta Trendafilova, Firas Feki, Sabina Taneva, Angel Konakchiev, Zhanina Petkova, Vladimir Dimitrov, Sami Sayadi, Svetlana Momchilova
Summary: The study found that the cake of Pistacia lentiscus fruit contains a high amount of fatty oil, with oleic and linoleic acids as the main fatty acid components. The oil extracted from the cake exhibits relatively high oxidative stability, while the chemical profile of the essential oil obtained from the defatted cake is similar to that of the fruit essential oil.
COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES
(2021)
Article
Agricultural Economics & Policy
Daniela Dimitrova, Vladimir Dimitrov
Summary: Price volatility is a major risk in the production of fresh fruit, and a detailed study of price fluctuations is essential for the sustainable development of the supply chain. The declining relative share of producer prices in recent years indicates the weakening market positions of producers and their limited market power to negotiate satisfactory purchase prices.
SCIENTIFIC PAPERS-SERIES MANAGEMENT ECONOMIC ENGINEERING IN AGRICULTURE AND RURAL DEVELOPMENT
(2021)
Article
Chemistry, Physical
Irena Philipova, Georgi Stavrakov, Vladimir Dimitrov, Nikolay Vassilev
JOURNAL OF MOLECULAR STRUCTURE
(2020)
Proceedings Paper
Energy & Fuels
Dimitar Arnaudov, Vladimir Dimitrov, Plamen Punov
2019 IEEE 60TH INTERNATIONAL SCIENTIFIC CONFERENCE ON POWER AND ELECTRICAL ENGINEERING OF RIGA TECHNICAL UNIVERSITY (RTUCON)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Gergana Vacheva, Vladimir Dimitrov, Nikolay Hinov
2019 16TH CONFERENCE ON ELECTRICAL MACHINES, DRIVES AND POWER SYSTEMS (ELMA)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Vladimir Dimitrov, Plamen Punov, Dimitar Arnaudov
2019 16TH CONFERENCE ON ELECTRICAL MACHINES, DRIVES AND POWER SYSTEMS (ELMA)
(2019)