Article
Sport Sciences
Sarah E. Costello, Jack R. W. Rossiter, Glyn Howatson, Phillip G. Bell, Barry O'Neill, Ken van Someren, Crystal F. Haskell-Ramsay
Summary: This study investigated the effects of intensified training on cognitive function, psychological state, and performance in trained cyclists. The findings showed that two weeks of intensified training resulted in overreaching, as demonstrated by decreased peak and mean power output, increased total mood disturbance, and disruption to recovery-stress balance. However, cognitive function remained unaffected during the training period, suggesting caution in using it as an early indicator of overreaching.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2023)
Article
Multidisciplinary Sciences
Pedro Fonseca, Marco Ross, Andreas Cerny, Peter Anderer, Fokke van Meulen, Hennie Janssen, Angelique Pijpers, Sylvie Dujardin, Pauline van Hirtum, Merel van Gilst, Sebastiaan Overeem
Summary: This study developed an efficient algorithm for sleep staging based on cardiac activity and body movements. A neural network was trained to classify different sleep stages using accelerometer and reflective PPG sensor data. The algorithm achieved comparable performance to a previously developed HRV-based approach, but with a significantly faster execution time. This algorithm has the potential to improve sleep diagnostics by providing a practical and effective tool.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Analytical
Gaelle Prigent, Kamiar Aminian, Tiago Rodrigues, Jean-Marc Vesin, Gregoire P. Millet, Mathieu Falbriard, Frederic Meyer, Anisoara Paraschiv-Ionescu
Summary: Recent advances in wearable technologies have enabled the monitoring of physiological metrics during physical activities, with the aim of improving performance and minimizing risk. By combining specific pre-processing methods and instantaneous frequency tracking algorithms, accurate estimation of breathing rate from heart rate can be achieved, providing valuable insights during exercise.
Article
Biochemical Research Methods
Jiajia Cui, Zhipei Huang, Jiankang Wu, Hong Jiang, Fei Qin, Zhiqiang Zhang
Summary: Autonomic dysfunction has various impacts on physical and psychological health. The assessment of autonomic regulation plays a crucial role in preventing, diagnosing, and treating diseases. This study proposes a mathematical model, called the Respiratory-Autonomic Sinus (RSA) regulation Model, to simulate the process of cardiopulmonary autonomic regulation. By using an optimization algorithm, the cardiopulmonary autonomic regulation parameters (CARP), including the sensitivity of respiratory-sympathetic nerves and respiratory-parasympathetic nerves, are obtained based on this model. Experimental studies conducted on healthy subjects, hypertension patients, and coronary heart disease patients have demonstrated the clinical significance of the obtained CARP.
Article
Psychology, Biological
Ali Gholamrezaei, Ilse Van Diest, Qasim Aziz, Johan W. S. Vlaeyen, Lukas Van Oudenhove
Summary: The study did not support the hypothesis that adding an inspiratory load to slow, deep breathing enhances its hypoalgesic effects. While pain intensity was slightly lower during SDB with load compared to normal-frequency controlled breathing, the difference was minimal. Heart rate variability was higher during SDB, but emotional responses were less favorable when using load.
Review
Engineering, Biomedical
Tomasz Golczewski
Summary: Arterial blood flow waveform shape analysis is commonly used in vessel diagnosis, with the Waveform Age index showing strong correlations with calendar age. Relationships between WA and heart rate, fatigue, and cognitive functions are particularly interesting, indicating potential links between ABFWS and physiological and psychological aspects.
BIOCYBERNETICS AND BIOMEDICAL ENGINEERING
(2021)
Article
Physiology
Zoran Matic, Aleksandar Kalauzi, Maximilian Moser, Mirjana M. Platisa, Mihailo Lazarevic, Tijana Bojic
Summary: This research investigates the influence of different body posture and breathing regimes on cardiorespiratory coupling, specifically focusing on the pulse respiration quotient (PRQ) as a tool to analyze the dynamic modifications. The results show that the linear features of CRC in PRQ signals are highly sensitive to posture and breathing rhythm perturbations. Furthermore, the study suggests that Stand01 state has the potential for PRQ tuning in conditions where PRQ is disturbed.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Clinical Neurology
Shanyan Lin, Danni Liu, Hui Zhang, Claudio Longobardi
Summary: This study examined the relationship between resilience and sense of alienation among college students, and how baseline respiratory sinus arrhythmia (RSA) moderates this relationship. The results indicated that resilience and sense of alienation were negatively related, and this relationship was significant among students with low levels of baseline RSA.
JOURNAL OF AFFECTIVE DISORDERS
(2023)
Article
Psychology, Biological
Rafaella Sinisgalli, Claudio A. B. de Lira, Rodrigo L. Vancini, Paulo J. G. Puccinelli, Lee Hill, Beat Knechtle, Pantelis T. Nikolaidis, Marilia S. Andrade
Summary: The study found that high-volume training may not have a positive impact on performance compared to lower volumes, while athletes with previous experience in Ironman races performed better in swimming splits and overall race time. Symptoms of overtraining, such as unintentional weight loss and decreased performance, negatively impacted triathlon performance.
PHYSIOLOGY & BEHAVIOR
(2021)
Article
Medicine, General & Internal
Johanna M. Mooren, Rene Garbsch, Hendrik Schaefer, Mona Kotewitsch, Melina Waranski, Marc Teschler, Boris Schmitz, Frank C. Mooren
Summary: This study compared the effects of different modes of aerobic endurance training on patients with Post-COVID-19 syndrome (PCS). The results showed that both continuous training and interval training improved physical exercise capacity and disease perception in PCS patients, with similar outcomes to coronary artery disease (CAD) patients undergoing rehabilitation.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Psychology, Developmental
Raha Hassan, Louis A. Schmidt
Summary: Shyness is a temperamental trait with a biological basis, and changes in respiratory sinus arrhythmia (RSA) in different contexts can affect shyness. The study found that cardiac vagal withdrawal during the stranger approach task positively predicted shyness at age 4.
DEVELOPMENTAL PSYCHOLOGY
(2023)
Article
Clinical Neurology
Andreas Buchmann, Christopher Ritter, Sabrina Theresia Muller, Melanie Haynes, Carmen Ghisleni, Ruth Tuura, Gregor Hasler
Summary: Subjects with a history of major depressive episode (MDE) showed significantly reduced respiratory sinus arrhythmia (RSA) compared to those who never experienced depression. Higher RSA was associated with lower anxiety and fear levels, particularly in relation to cardiac symptoms and the fear of dying. Lower RSA was also linked to elevated levels of cytokines and thyroid-stimulating hormone in the serum, suggesting a potential connection between the immune system, vegetative nervous system, and emotional dysregulation.
JOURNAL OF AFFECTIVE DISORDERS
(2022)
Article
Cardiac & Cardiovascular Systems
J. Shanks, Y. Abukar, N. A. Lever, M. Pachen, I. J. LeGrice, D. J. Crossman, A. Nogaret, J. F. R. Paton, R. Ramchandra
Summary: Heart rate variability (HRV) is an important indicator of cardiovascular health, and low HRV is correlated with disease severity and mortality in heart failure. Restoring respiratory sinus arrhythmia (RSA) in heart failure can improve cardiac function and produce greater improvement than current conventional therapies.
BASIC RESEARCH IN CARDIOLOGY
(2022)
Article
Psychology, Biological
Hui Zhang, Yun Luo, Toshanna Davis, Linlin Zhang
Summary: The study found that childhood maltreatment interacts with tonic RSA to predict depressive symptoms in young adults, particularly among those with lower RSA levels. These results suggest that the relationship between childhood maltreatment and depressive symptoms depends on young adults' physiological functioning and flexibility.
Article
Psychiatry
Haneen Abdulhamid, Nils Jager, Holger Schnadelbach, Alastair D. Smith
Summary: This study examines the relationship between alexithymia and interoceptive functioning, finding that participants with higher levels of alexithymia perform worse in psychophysiological measurements and respiratory matching tasks, suggesting that alexithymia affects not only conscious interoceptive activities but also has an impact in immersive environments.
JOURNAL OF PSYCHOSOMATIC RESEARCH
(2022)
Article
Physiology
Briar L. Rudsits, Will G. Hopkins, Christophe A. Hautier, David M. Rouffet
JOURNAL OF APPLIED PHYSIOLOGY
(2018)
Article
Biophysics
R. Trama, Y. Blache, C. Hautier
JOURNAL OF BIOMECHANICS
(2019)
Article
Health Care Sciences & Services
Damien Saboul, Christophe Hautier
JOURNAL OF MEDICAL SYSTEMS
(2019)
Article
Sport Sciences
Pascal Balducci, Damien Saboul, Robin Trama
JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
(2019)
Article
Psychology, Biological
Thiago Ferreira Dias Kanthack, Aymeric Guillot, Damien Saboul, Ursula Debarnot, Franck Di Rienzo
PHYSIOLOGY & BEHAVIOR
(2019)
Article
Physiology
Baptiste Morel, Thomas Lapole, Cyril Liotard, Christophe Hautier
FRONTIERS IN PHYSIOLOGY
(2019)
Article
Engineering, Biomedical
Tom Francois, Lilian Calvet, Sabrina Madad Zadeh, Damien Saboul, Simone Gasparini, Prasad Samarakoon, Nicolas Bourdel, Adrien Bartoli
INTERNATIONAL JOURNAL OF COMPUTER ASSISTED RADIOLOGY AND SURGERY
(2020)
Article
Engineering, Biomedical
Robin Trama, Christophe A. Hautier, Robin Souron, Thomas Lapole, Alexandre Foure, Yoann Blache
Summary: This study assessed whether accelerometry effectively reflects muscle vibrations measured with ultrafast ultrasonography, revealing differences in assessing muscle vibration characteristics between accelerometry and ultrasonography caused by subcutaneous fat thickness. Recommendations include high-pass filtering the acceleration signal at 20 Hz and including participants with less fat thickness for more accurate assessments.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2021)
Article
Hospitality, Leisure, Sport & Tourism
Antoine Relave, Mickael Campo, Christophe Hautier, Michel Nicolas
Summary: The study found a positive relationship between effort intensity and intragroup social interactions during rest periods, especially at the end of training. Ending a conditioning session at 100% MAS after linear progression may influence social identity mobility, leading to more cooperation between group members. The study suggests that conditioning can be a powerful approach to build social bonds and optimize group dynamics in rugby.
JOURNAL OF APPLIED SPORT PSYCHOLOGY
(2022)
Article
Medicine, General & Internal
Etienne Gouraud, Philippe Connes, Alexandra Gauthier-Vasserot, Camille Faes, Salima Merazga, Solene Poutrel, Celine Renoux, Camille Boisson, Philippe Joly, Yves Bertrand, Arnaud Hot, Giovanna Cannas, Christophe Hautier
Summary: This study investigated the relationship between muscle dysfunction and exercise capacity in sickle cell disease patients. The results suggest that the performance in the 6-MWT is primarily explained by anemia and self-paced step frequency in these patients, with no muscle fatigue observed.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Physiology
Qingshan Zhang, Aurelie Leam, Alexandre Foure, Del P. Wong, Christophe A. Hautier
Summary: The study revealed a significant relationship between explosive strength of knee muscles and linear deceleration performance, emphasizing the importance of quickly producing high eccentric torque for braking force. Furthermore, RTD H/Q plays a crucial role in evaluating knee joint dynamic stability and can be a relevant index for determining deceleration performance.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Sport Sciences
Lucie Lerebourg, Damien Saboul, Michel Clemencon, Jeremy Bernard Coquart
Summary: This study used artificial neural network (ANN) and k-nearest neighbor (KNN) to predict marathon performances and compared them with actual performances. The results showed no significant difference between the predicted and actual performances, with high correlation coefficients. KNN outperformed ANN with a mean absolute error of 2.4%.
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
(2023)
Article
Sport Sciences
Qingshan Zhang, Robin Trama, Alexandre Foure, Christophe A. Hautier
JOURNAL OF HUMAN KINETICS
(2020)
Article
Sport Sciences
Marine Alhammoud, Clint Hansen, Frederic Meyer, Christophe Hautier, Baptiste Morel
FRONTIERS IN SPORTS AND ACTIVE LIVING
(2020)