Ankle angle effects on endurance time, median frequency and mean power of gastrocnemius EMG power spectrum: a comparison between individual and group analysis

Matthijsse, Petra C.; Hendrich, K M; Rijnsburger, W. H.; Woittiez, R. D.; Huijing, P.A.J.B.M.

doi:10.1080/00140138708966004

Cited by 24 publications

(8 citation statements)

References 16 publications

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“…Although all these parameters are somewhat correlated, their influence on the characteristics of SEMG signal is difficult to quantify, especially as far as individual characterisation is concerned. Conse-quently, individual SEMG results in this study show a definite disparity, as already observed in other studies [7,18,24].…”

Section: Experimental Limitationssupporting

confidence: 82%

Fatigue of Elbow Flexors During Repeated Flexion-Extension Cycles: Effect of Movement Strategy

Guével¹,

Hogrel²,

Marini³

2000

Int J Sports Med

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The objective of this work was to study the influence of movement strategy on fatigue of elbow flexors during repeated flexion-extension cycles in order to enlighten the fatigue process occurring during "pumping" in boardsailing. This dynamic exercise was performed by six high-level Olympic boardsailors according to two movement strategies with different amplitude and frequency. The parameters of the exercise were chosen to result in similar mechanical work at every instant for both modalities. Isometric evaluation was performed before and after dynamic exercise to quantify muscle fatigue. Analysis of physical parameters (maximum voluntary contraction, endurance time) and electromyographic parameters (in both temporal and frequency domains) emphasized the peripheral origin of muscle fatigue at the level of the biceps brachii and the brachioradialis. After considering the limitations of this type of study, the results are discussed in terms of synergy and differentiation between muscles, peripheral fatigue and movement strategy. Although the mechanical work and total physiological demands were similar for the two movement modalities, analysis of electromyographic parameters suggests that muscle fatigue mainly involves the biceps brachii when movements were slow and wide, and the brachioradialis when they were rapid and short. This study makes it possible to take these specificities into account in order to adjust the physical training program.

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Section: Experimental Limitationssupporting

confidence: 82%

Fatigue of Elbow Flexors During Repeated Flexion-Extension Cycles: Effect of Movement Strategy

Guével¹,

Hogrel²,

Marini³

2000

Int J Sports Med

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“…The active and/or passive stretching of the gastrocnemius muscle is the main factor to control the ankle dorsi flexion [ 62 ], which, in turn, is suggested to be the determining factor for the optimization of the vertical squat jump performance [ 56 ]. The present findings can be interpreted under the perspective that the alteration of the angular position of the examined joints result in changes in the length of the gastrocnemius muscle and eventually to the function of its musculotendinous unit [ 47 , 50 , 63 , 64 ] and the neuromechanical function of the ankle joint flexors and extensors [ 65 , 66 , 67 , 68 , 69 , 70 ]. It is suggested that these modifications due to the different ankle angle cause alterations in the force application capabilities of the shank muscles, as well as in the transfer of the power [ 62 , 71 , 72 , 73 , 74 , 75 , 76 , 77 ].…”

Section: Discussionmentioning

confidence: 96%

The Ankle Joint Range of Motion and Its Effect on Squat Jump Performance with and without Arm Swing in Adolescent Female Volleyball Players

Panoutsakopoulos

Kotzamanidou

Papaiakovou

et al. 2021

JFMK

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A flexible ankle joint is suggested to be a contributing factor for vertical squat jump (SQJ) performance. The purpose of the study was to investigate the effect of the active (ACT) and passive (PAS) ankle joint range of motion (ROM) on SQJ performed by adolescent female volleyball players. ACT and PAS ankle ROM at knee extension angles of 90, 140, and 180 degrees (180 degrees: full extension) were measured with a video analysis method for 35 female post-pubertal volleyball players (16.3 ± 1.1 yrs, 1.80 ± 0.04 m, 68.8 ± 6.8 kg). Additionally, the players fulfilling previously recommended criteria were assigned to the flexible (n = 10) and inflexible (n = 8) groups and executed SQJ with and without an arm swing on a force-plate. Results of the 2 × 2 × 3 MANOVA revealed a significant (p < 0.05) flexibility type and knee angle effect, as ankle ROM was larger in PAS compared to ACT and as the knee joint progressed from 90 to 180 degrees extension. The 2 × 2 ANOVA revealed a significant (p < 0.05) group effect, as flexible players jumped higher in the arm swing SQJ, along with a significant arm swing effect on key SQJ kinetic parameters. In conclusion, a more flexible ankle joint result in improved SQJ performance. Therefore, ankle flexibility training should be implemented in youth volleyball players.

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“…1984, Rohmert et al . 1986, Sjogaard 1986) than the exponential model (Manenica 1986, Matthijsse et al . 1987, Rose et al .…”

Section: Discussionmentioning

confidence: 99%

Endurance time is joint-specific: A modelling and meta-analysis investigation

2010

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Static task intensity–endurance time (ET) relationships (e.g. Rohmert's curve) were first reported decades ago. However, a comprehensive meta-analysis to compare experimentally-observed ETs across bodily regions has not been reported. We performed a systematic literature review of ETs for static contractions, developed joint-specific power and exponential models of the intensity–ET relationships, and compared these models between each joint (ankle, trunk, hand/grip, elbow, knee, and shoulder) and the pooled data (generalised curve). 194 publications were found, representing a total of 369 data points. The power model provided the best fit to the experimental data. Significant intensity-dependent ET differences were predicted between each pair of joints. Overall, the ankle was most fatigue-resistant, followed by the trunk, hand/grip, elbow, knee and finally the shoulder was most fatigable. We conclude ET varies systematically between joints, in some cases with large effect sizes. Thus, a single generalised ET model does not adequately represent fatigue across joints. Statement of Relevance Rohmert curves have been used in ergonomic analyses of fatigue, as there are limited tools available to accurately predict force decrements. This study provides updated endurance time–intensity curves using a large meta-analysis of fatigue data. Specific models derived for five distinct joint regions should further increase prediction accuracy.

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Ankle angle effects on endurance time, median frequency and mean power of gastrocnemius EMG power spectrum: a comparison between individual and group analysis

Cited by 24 publications

References 16 publications

Fatigue of Elbow Flexors During Repeated Flexion-Extension Cycles: Effect of Movement Strategy

Fatigue of Elbow Flexors During Repeated Flexion-Extension Cycles: Effect of Movement Strategy

The Ankle Joint Range of Motion and Its Effect on Squat Jump Performance with and without Arm Swing in Adolescent Female Volleyball Players

Endurance time is joint-specific: A modelling and meta-analysis investigation

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