Article
Physiology
Julius Lidar, Mats Ainegren, David Sundstrom
Summary: The aim of this study was to develop and validate a bioenergetic model describing the dynamic behavior of different energy supply systems and energy demands. The model was formulated as a system of differential equations and validated using data from experimental trials. The validation showed good agreement between measured and modeled metabolic rates during intermittent cycling, although there was some variability.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2023)
Article
Physiology
Jason C. Bartram, Dominic Thewlis, David T. Martin, Kevin Norton
Summary: Analyzing the modeling of intermittent work capacity in elite cyclists, the Bartram adjustment was found to be an improvement over the Skiba 2 model, with a focus on W' in this population. However, in the specific context of team pursuit races, all models were too variable for effective use, indicating the need for exploration of individual recovery rates beyond population-specific rates.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2022)
Article
Physiology
Ove Sollie, Thomas Losnegard
Summary: This study compared sex differences in skiing performance among elite adolescent, junior, and senior cross-country skiers. The results showed that men outperformed women in distance covered and skiing power, while the differences in gross efficiency, accumulated oxygen deficit, and strength were not significant.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2022)
Article
Computer Science, Information Systems
Yuntian Liu, Jeph Herrin, Chenxi Huang, Rohan Khera, Lovedeep Singh Dhingra, Weilai Dong, Bobak J. Mortazavi, Harlan M. Krumholz, Yuan Lu
Summary: This study aims to improve nonexercise algorithms using machine learning methods and US national population surveys. The results show that the nonexercise algorithms using LightGBM have significantly improved accuracy in estimating cardiorespiratory fitness.
JOURNAL OF THE AMERICAN MEDICAL INFORMATICS ASSOCIATION
(2023)
Article
Physiology
Christopher B. Cooper, Alan Garfinkel
Summary: The kinetic response of oxygen uptake to transitions of exercise intensity is an important parameter of aerobic function. A novel geometric method is developed to determine the time constant of oxygen uptake using slopes and intercepts of a plot of cumulative oxygen uptake versus time, without requiring multiple repetitions of the exercise protocol.
JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Review
Sport Sciences
Max Niemeyer, Raphael Knaier, Ralph Beneke
Summary: Studies show that research methods and physiological factors play a crucial role in the occurrence of VO(2)pl (maximum oxygen uptake plateau). Many studies use inappropriate definitions or methodical approaches, leading to inaccurate detection of VO(2)pl. Additionally, there is still uncertainty regarding whether there are differences in VO(2)pl occurrence based on exercise mode, type, and testing method.
Article
Sport Sciences
Jan Helgerud, Hakon Hov, Hakon Mehus, Bard Balto, Anders Boye, Lars Finsas, Jan Hoff, Eivind Wang
Summary: This study compared the effects of high-intensity interval training (HIIT) and sprint interval training (SIT) on maximal oxygen uptake (VO2max), anaerobic capacity, and endurance performance in women. The results showed that HIIT significantly increased VO2max in women, while SIT led to more training injuries. Both training protocols improved running performance in women.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2023)
Review
Cell Biology
Martin J. Gibala, Martin J. MacInnis
Summary: Brief, intense interval training improves V_O2max through various physiological changes, including increased maximal cardiac output and blood volume, as well as changes in capillary and mitochondrial density. However, the specific mechanisms underlying these improvements are still unclear and require further investigation using contemporary technologies.
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Marcin Maciejczyk, Tomasz Palka, Magdalena Wiecek, Jadwiga Szymura, Justyna Kusmierczyk, Marek Bawelski, Sebastian Masel, Zbigniew Szygula
Summary: The aim of this study was to evaluate the effects of interval training performed in hypoxia on aerobic capacity and second ventilatory threshold in young, untrained men. The results showed that compared to training in normoxia, interval training in hypoxia significantly improved maximum oxygen uptake and power output at the second ventilatory threshold.
APPLIED SCIENCES-BASEL
(2023)
Article
Sport Sciences
Anders Aandstad
Summary: The study established equations to convert 3,000 m run performance into predicted V?O-2max, with validity statistics provided. The correlation between V?O-2max and average 3,000 m run speed was shown to be high, making the 3,000 m test a time-effective alternative aerobic fitness test.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Multidisciplinary Sciences
Lavinia Falcioni, Laura Guidetti, Carlo Baldari, Maria Chiara Gallotta, Marco Meucci
Summary: This study investigated the association between peak oxygen uptake and peak and submaximal OUES, as well as the agreement between submaximal OUES and peak OUES. The results showed a strong correlation between peak oxygen uptake and peak OUES, and a fair-to-very strong correlation between peak oxygen uptake and the two submaximal OUES. The level of agreement was higher between peak OUES and OUES up to the anaerobic threshold than between peak oxygen uptake and OUES up to the aerobic threshold.
Article
Anesthesiology
Bernhard Riedel, Michael H-G Li, C. H. Angus Lee, Hilmy Ismail, Brian H. Cuthbertson, Duminda N. Wijeysundera, Kwok M. Ho
Summary: This study identified five questions in the DASI assessment that were more important in reflecting exercise capacity, leading to the development of the M-DASI-5Q and M-DASI-4Q models for predicting anaerobic threshold and peak oxygen consumption. These simplified models showed comparable performance to the original 12-question DASI model in predicting postoperative complications. Adding a dynamic component to the M-DASI-4Q improved its ability to discriminate between different levels of peak oxygen consumption.
BRITISH JOURNAL OF ANAESTHESIA
(2021)
Article
Physiology
Gen-Min Lin, Kun-Zhe Tsai, Xuemei Sui, Carl J. Lavie
Summary: This study examined the correlations between time and estimated power output (EPO) for a run field test and VO2 max obtained from cardiopulmonary exercise testing (CPET). The results showed that EPO had a stronger correlation with VO2 max compared to time.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Medicine, General & Internal
Francesca Battista, Daniel Neunhaeuserer, Anna Centanini, Andrea Gasperetti, Giulia Quinto, Marco Vecchiato, Elia Bianchi, Anna Chiara Frigo, Silvia Bettini, Roberto Vettor, Luca Busetto, Andrea Ermolao
Summary: Cardiorespiratory fitness (CRF) is significantly related to morbidity and mortality in patients with obesity. This study shows that age and BMI are independent determinants of CRF in obese patients.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Sport Sciences
Oyvind Skattebo, Espen Spro Johansen, Carlo Capelli, Jostein Hallen
Summary: This study found that the deterioration of VO2max and maximal exercise capacity accelerates with the magnitude of acute blood loss, likely because rapid plasma volume restoration is sufficient to establish blood volume normality after a small but not after a moderate blood loss.
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
(2021)