Article
Sport Sciences
James L. Nuzzo, Matheus D. Pinto, Kazunori Nosaka
Summary: Connected adaptive resistance exercise (CARE) machines are new technology that can adjust resistance exercise loads in response to muscle fatigue. This study found that different protocols of maximal effort bicep curl exercise on a CARE machine can effectively induce muscle fatigue, with women being more sensitive to fatigue in the eccentric phase and men being more sensitive to fatigue in the concentric phase.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2023)
Article
Sport Sciences
Trevor C. Chen, Shang-Hen Wu, Hsin-Lian Chen, Wei-Chin Tseng, Kuo-Wei Tseng, Hsing-Yu Kang, Kazunori Nosaka
Summary: This study found that eccentric training was effective in reducing the negative effects of immobilization and attenuating muscle damage caused by eccentric exercise after immobilization, when compared with concentric training.
MEDICINE & SCIENCE IN SPORTS & EXERCISE
(2023)
Article
Sport Sciences
Alejandro Rodriguez-Fernandez, Daniel Castillo, Javier Raya-Gonzalez, Raul Dominguez, Stephen J. Bailey
Summary: The study demonstrates that acute beetroot juice supplementation significantly improves mean and peak power output of muscles during half-squat movements, whether in concentric or eccentric phases. These findings contribute to understanding the impact of beetroot juice supplementation on skeletal muscle contractile function and its potential implications for enhancing muscle power output in sports performance.
JOURNAL OF SCIENCE AND MEDICINE IN SPORT
(2021)
Article
Sport Sciences
S. Methenitis, A. A. Theodorou, P. N. Chatzinikolaou, N. V. Margaritelis, M. G. Nikolaidis, V. Paschalis
Summary: The aim of this study was to compare the effect of chronic concentric or eccentric training on position sense and joint reaction angle in young men. The results showed that both types of training significantly changed position sense, reaction angle, and exercise-induced muscle damage indices after the initial training session. There were no significant changes after the final training session. The changes in position sense and reaction angle were related to the magnitude of muscle damage, rather than the type of muscle contraction.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2023)
Review
Sport Sciences
James L. Nuzzo, Matheus D. Pinto, Kazunori Nosaka
Summary: Since the 1970s, researchers have been studying the potential difference in muscle fatigue between maximal eccentric and concentric resistance exercise. Our paper aimed to review studies comparing acute changes in muscle strength after bouts of these exercises. We identified 30 relevant studies, which showed that both exercises caused significant strength loss, but the loss was less in lower-body muscles during eccentric exercise. We also found evidence of similar strength loss in the eccentric and concentric phases during coupled exercises.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2023)
Article
Physiology
Tobias Duennwald, Giuseppe Paglia, Guenter Weiss, Vanna Denti, Martin Faulhaber, Wolfgang Schobersberger, Henning Wackerhage
Summary: This study aimed to investigate alterations in the blood plasma metabolome in response to high intensity concentric-eccentric leg exercise performed at a simulated altitude. Through metabolomics analysis, significant differences were observed in the metabolome immediately after exercise, and some relative metabolite concentrations remained changed on day 8 after exercise.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Health Care Sciences & Services
Ukadike C. Ugbolue, Emma L. Yates, Kerensa Ferguson, Scott C. Wearing, Yaodong Gu, Wing-Kai Lam, Julien S. Baker, Frederic Dutheil, Nicholas F. Sculthorpe, Tilak Dias
Summary: This study aimed to investigate gender differences in lower limb muscle activation during a heel raise task. Results from 10 females and 10 males showed no significant differences in muscle activation between different phases and muscles, indicating that gender does not significantly influence eccentric muscle activation during the standing heel raise task.
Article
Physiology
Sergio Maroto-Izquierdo, Fernando Martin-Rivera, Kazunori Nosaka, Marco Beato, Javier Gonzalez-Gallego, Jose A. de Paz
Summary: This study compared the effects of submaximal and supramaximal eccentric training on muscle structure and function. The results showed similar improvements in muscle power, hypertrophy, and hormonal responses between the two training approaches. However, only supramaximal training significantly increased single-leg jump height and one-repetition maximum strength. Therefore, the use of supramaximal loading may not be necessary for healthy, active individuals.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Sport Sciences
Evgenia D. Cherouveim, Nikos Margaritelis, Panagiotis Koulouvaris, Charis Tsolakis, Vasiliki J. Malliou, Panagiotis N. Chatzinikolaou, Martino Franchi, Simone Porcelli, Antonios Kyparos, Ioannis S. Vrabas, Nikos D. Geladas, Michalis G. Nikolaidis, Vassilis Paschalis
Summary: The study aimed to investigate potential differences between isokinetic eccentric and concentric exercises at a moderate intensity until exhaustion. It was found that eccentric exercise leads to greater resistance to fatigue and more work output compared to concentric exercise, despite similar levels of muscle and cerebral oxygenation.
JOURNAL OF SPORTS SCIENCES
(2022)
Article
Physiology
Riku Yoshida, Kazuki Kasahara, Yuta Murakami, Shigeru Sato, Kazunori Nosaka, Masatoshi Nakamura
Summary: This study compared the fatigue profiles of the biceps brachii muscle during repetitive maximal concentric and eccentric contractions, and found that the muscle had greater fatigue resistance during eccentric contractions compared to concentric contractions.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2023)
Article
Physiology
Shigeru Sato, Riku Yoshida, Fu Murakoshi, Yuto Sasaki, Kaoru Yahata, Kazuki Kasahara, Joao Pedro Nunes, Kazunori Nosaka, Masatoshi Nakamura
Summary: This study compared the effects of different training methods on muscle strength and hypertrophy of the elbow flexors. The results showed that eccentric training and concentric-eccentric coupled training had similar effects on muscle strength and thickness, while concentric training contributed less to the training effects.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Article
Physiology
Xin Ye, William M. Miller, Sunggun Jeon, Jun Seob Song, Tyler J. West
Summary: The study aimed to investigate whether initial muscle-damaging exercise could confer a protective effect between different muscle groups. Results showed that, relative to the control group, the experimental group exhibited an exacerbating damaging effect on knee flexor isometric strength following the second exercise bout.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Nutrition & Dietetics
Tzu-Shao Yeh, Tze-Huan Lei, Matthew J. Barnes, Lei Zhang
Summary: Astragalosides supplementation reduces muscle damage, suppresses inflammation, enhances muscle regeneration, and accelerates muscle strength recovery after exercise-induced injury.
Article
Multidisciplinary Sciences
Mitsuyoshi Murayama, Takayuki Inami, Norihiro Shima, Tsugutake Yoneda, Kazunori Nosaka
Summary: This study compared the changes in biceps brachii muscle hardness between eccentric and concentric contractions. The results showed that muscle hardness increased more after eccentric contractions. Additionally, both PM and SE were effective in detecting changes in muscle hardness.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Daniel Boullosa, Boris Dragutinovic, Jan-Philip Deutsch, Steffen Held, Lars Donath, Wilhelm Bloch, Moritz Schumann
Summary: This study compared acute responses to all out efforts in concentric vs. eccentric cycling, revealing that concentric cycling induced larger mechanical and cardiometabolic responses. Perceptual responses to both protocols were similar, with an immediate potentiation of vertical jump after concentric cycling and slight increases in muscle soreness and thigh circumference only 24 hours after eccentric cycling.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
