Less fatiguability in eccentric than concentric repetitive maximal muscle contractions

Yoshida, Riku; Kasahara, Kazuki; Murakami, Yuta; Sato, Shigeru; Nosaka, Kazunori; Nakamura, Masatoshi

doi:10.1007/s00421-023-05178-4

Cited by 2 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…26 Amplitudes of electromyographic (EMG) signals were similar between ECC max and CON max muscle actions, 9,20,26,27,48,49 though two studies reported greater EMG amplitudes during CON max than ECC max muscle actions. 25,50 EMG amplitudes decreased with repeated ECC max and CON max muscle actions in some studies 9,11,27,29,[49][50][51][52] but not in others. 10,20,25,26,48,53 When reductions in EMG amplitude were present, usually there was no difference in the magnitude of decrease between ECC max and CON max exercise, 9,11,27,29,49,51,52 although one study reported a greater decrease in EMG after CON max exercise.…”

Section: Physiological Outcomesmentioning

confidence: 86%

“…25,50 EMG amplitudes decreased with repeated ECC max and CON max muscle actions in some studies 9,11,27,29,[49][50][51][52] but not in others. 10,20,25,26,48,53 When reductions in EMG amplitude were present, usually there was no difference in the magnitude of decrease between ECC max and CON max exercise, 9,11,27,29,49,51,52 although one study reported a greater decrease in EMG after CON max exercise. 50 Moreover, irrespective of whether EMG amplitude was reduced after ECC max or CON max exercise, this reduction (or lack thereof) was sometimes, 11,48,51 though not always, [49][50][51] less than the large reductions in strength that occurred with these fatiguing protocols.…”

Section: Physiological Outcomesmentioning

confidence: 86%

“…For example, both ECC max and CON max exercise often caused acute strength loss in ECC, CON, and isometric strength assessments. 22,[26][27][28][29] In some studies, the acute strength loss was most pronounced in the muscle action type used during exercise (i.e., specificity of fatigue), 14,26 whereas in other studies, the acute strength loss was similar between strength assessments. 27,28 The fourth finding was that the muscle group undergoing the exercise impacted whether there was a difference in acute strength loss between ECC max versus CON max exercise.…”

Section: Acute Strength Lossmentioning

confidence: 99%

“…We identified seven studies 5,6,23,29,54-56 that examined changes in ECC and CON phase muscle strength during coupled ECC max -CON max resistance exercise (Table 5). Four of these studies were of the elbow flexors, 5,6,29,55 one was of the knee extensors, 54 and two were of the ankle plantarflexors. 23,56 Some of these studies included comparative groups of ECC max and/or CON max exercise, though results from these comparative groups are not presented in Table 5.…”

Section: Coupled Ecc Max -Con Max Resistance Exercisementioning

confidence: 99%

“…Exceptions to this were the studies by Nuzzo and colleagues, 5,6 who found greater acute strength loss in the CON than ECC phase. The studies by Nuzzo and colleagues 5,6 involved exercise and strength testing on a connected adaptive resistance exercise machine, whereas all other studies 23,29,[54][55][56] involved exercise and strength testing on isokinetic dynamometers. The reason why the connected adaptive resistance exercise machine induced greater acute strength loss in the CON than the ECC phase during coupled ECC max -CON max exercise is unclear.…”

Section: Coupled Ecc Max -Con Max Resistance Exercisementioning

confidence: 99%

See 4 more Smart Citations

Overview of muscle fatigue differences between maximal eccentric and concentric resistance exercise

Nuzzo

Pinto

Nosaka

2023

Scandinavian Med Sci Sports

View full text Add to dashboard Cite

Since the 1970s, researchers have studied a potential difference in muscle fatigue (acute strength loss) between maximal eccentric (ECCmax) and concentric (CONmax) resistance exercise. However, a clear answer to whether such a difference exists has not been established. Therefore, the aim of our paper was to overview methods and results of studies that compared acute changes in muscle strength after bouts of ECCmax and CONmax resistance exercise. We identified 30 relevant studies. Participants were typically healthy men aged 20–40 years. Exercise usually consisted of 40–100 isokinetic ECCmax and CONmax repetitions of the knee extensors or elbow flexors. Both ECCmax and CONmax exercise caused significant strength loss, which plateaued and rarely exceeded 60% of baseline, suggesting strength preservation. In upper‐body muscles, strength loss at the end of ECCmax (31.4 ± 20.4%) and CONmax (33.6 ± 17.5%) exercise was similar, whereas in lower‐body muscles, strength loss was less after ECCmax (13.3 ± 12.2%) than CONmax (39.7 ± 13.3%) exercise. Muscle architecture and daily use of lower‐body muscles likely protects lower‐body muscles from strength loss during ECCmax exercise. We also reviewed seven studies on muscle fatigue during coupled ECCmax‐CONmax exercise and found similar strength loss in the ECC and CON phases. We also found evidence from three studies that more ECC than CON repetitions can be completed at equal relative loads. These results indicate that muscle fatigue may manifest differently between ECCmax and CONmax resistance exercise. An implication of the results is that prescriptions of ECC resistance exercise for lower‐body muscles should account for greater fatigue resilience of these muscles compared to upper‐body muscles.

show abstract

Section: Physiological Outcomesmentioning

confidence: 86%

Section: Physiological Outcomesmentioning

confidence: 86%

Section: Acute Strength Lossmentioning

confidence: 99%

Section: Coupled Ecc Max -Con Max Resistance Exercisementioning

confidence: 99%

Section: Coupled Ecc Max -Con Max Resistance Exercisementioning

confidence: 99%

See 3 more Smart Citations

Overview of muscle fatigue differences between maximal eccentric and concentric resistance exercise

Nuzzo

Pinto

Nosaka

2023

Scandinavian Med Sci Sports

View full text Add to dashboard Cite

show abstract

Systematic review and meta-analysis of eccentric-only versus concentric-only strength training effects on maximal voluntary eccentric, concentric and isometric contraction strength

Spudić,

Nosaka

2024

Preprint

View full text Add to dashboard Cite

Background Conflicting results have been reported regarding the effects of resistance exercise training with eccentric (lengthening muscle) versus concentric (shortening muscle) contractions on changes in muscle mechanical function assessed by different contraction modes. Objective The main objective of this systematic review with meta-analyses was to compare effectiveness of maximal isokinetic eccentric-only and concentric-only strength training for changes in maximal voluntary eccentric (MVCECC), concentric (MVCCON), and isometric contraction (MVCISO) strength in healthy adults. Methods We conducted a systematic search in PubMed, SPORTDiscus, and Google Scholar from February to March 2024 for studies that met the following criteria: (1) randomized controlled trials; (2) inclusion of eccentric-only and concentric-only strength training groups; (3) use of an isokinetic dynamometer for training and testing; (4) reporting changes over time in MVCCON and MVCECC; and (5) using healthy adult participants. The certainty of evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation approach. A multilevel random-effects model meta‑analyses with robust variance estimation were performed in Rstudio software using metaphor and clubSandwich packages. Moreover, sensitivity analysis was performed, excluding the highly influential studies. The potential moderating role of sex, training status and age of the participants, muscles, velocity in training and testing, initial MVCECC, MVCCON, and MVCECC/MVCCON ratio, and training-related variables such as number of repetitions per set, number of sets, number of sessions per week, and duration of the training protocol were also assessed. Results Twenty-seven studies matched with the criteria, and overall 162 study results were identified and included in the meta-analyses. Greater effects on MVCECC was found after eccentric-only versus concentric-only training (Hedge’s g: 1.51; 27% vs. 10%; p < .05). However, no differences were evident between the training modalities for changes in MVCCON (Hedge’s g: − 0.10; 13% vs. 14%, p = .726) and MVCISO (Hedge’s g: − 0.04; 18% vs. 17%; p = .923). The subgroup analyses showed smaller effect of eccentric-only than concentric-only training on MVCCON when eccentric-only training was performed at higher velocities than the velocities of MVCCON testing (Hedge’s g: − 0.99; p < .05). Meta-regressions showed that the longer the training period, the greater the superior effect of eccentric over concentric training on MVCECC. Conclusions Eccentric-only strength training is more effective for improving MVCECC, but both concentric-only and eccentric-only training provide similar effects on improving MVCCON and MVCISO. Further studies are necessary to investigate the mechanisms underpinning the superior effect of eccentric-only training.

show abstract

Less fatiguability in eccentric than concentric repetitive maximal muscle contractions

Cited by 2 publications

References 35 publications

Overview of muscle fatigue differences between maximal eccentric and concentric resistance exercise

Overview of muscle fatigue differences between maximal eccentric and concentric resistance exercise

Systematic review and meta-analysis of eccentric-only versus concentric-only strength training effects on maximal voluntary eccentric, concentric and isometric contraction strength

Contact Info

Product

Resources

About