Effects of short‐term resistance training and subsequent detraining on the electromechanical delay

Costa, Pablo B.; Herda, Trent J.; Walter, Anne; Valdez, Andrea M.; Cramer, Joel T.

doi:10.1002/mus.23756

Cited by 13 publications

(9 citation statements)

References 22 publications

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“…and Stock et al ., however, reported no training‐induced changes in EMD after 7 and 4 weeks of DCER or sprint training, respectively. Although there have been conflicting findings regarding the ability to identify training‐induced adaptations in EMD, our study suggests that EMD E‐F , EMD E‐M , and EMD M‐F may be useful for examining peripheral fatigue. Specifically, the time‐point at EMD E‐F becomes greater than the initial repetitions EMD value may reflect the onset of peripheral fatigue and the time‐course of changes in EMD E‐M , and EMD M‐F may indicate fatigue‐induced changes in excitation–contraction coupling and the series elastic component, respectively.…”

Section: Discussionmentioning

confidence: 75%

Changes in electromechanical delay during fatiguing dynamic muscle actions

et al. 2017

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Section: Discussionmentioning

confidence: 75%

Changes in electromechanical delay during fatiguing dynamic muscle actions

et al. 2017

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“…Kubo et al [30] found that 12 weeks of isometric knee extension training led to decreases in EMD associated with increases in tendon stiffness and rate of torque development. However, Costa et al [14] did not find EMD improvements after very short isokinetic vs. dynamic constant external resistance knee extension training. Similarly, Häkkinen and Komi [22] were unable to find changes in EMD after 16 weeks of dynamic knee extensor training.…”

Section: Emd (Ms)mentioning

confidence: 90%

“…Finally, RT individuals, when compared to endurance athletes, have been found to have shorter EMD [53], which represents the time between the onset of electrical activity at the muscle and the onset of torque, and is positively related to stiffness changes in the serieselastic component [10,30,31]. Nevertheless, RT involving concentric and eccentric muscle actions have not been found to be effective in decreasing EMD [14,22].…”

Section: Introductionmentioning

confidence: 99%

Different Muscle Action Training Protocols on Quadriceps-Hamstrings Neuromuscular Adaptations

et al. 2018

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The aim of this study was to compare three specific concentric and eccentric muscle action training protocols on quadriceps-hamstrings neuromuscular adaptations. Forty male volunteers performed 6 weeks of training (two sessions/week) of their dominant and non-dominant legs on an isokinetic dynamometer. They were randomly assigned to one of four groups; concentric quadriceps and concentric hamstrings (CON/CON, n=10), eccentric quadriceps and eccentric hamstrings (ECC/ECC, n=10), concentric quadriceps and eccentric hamstrings (CON/ECC, n=10), or no training (CTRL, n=10). Intensity of training was increased every week by decreasing the angular velocity for concentric and increasing it for eccentric groups in 30°/s increments. Volume of training was increased by adding one set every week. Dominant leg quadriceps and hamstrings muscle thickness, muscle quality, muscle activation, muscle coactivation, and electromechanical delay were tested before and after training. Results revealed that all training groups similarly increased MT of quadriceps and hamstrings compared to control (p<0.05). However, CON/ECC and ECC/ECC training elicited a greater magnitude of change. There were no significant differences between groups for all other neuromuscular variables (p>0.05). These findings suggest that different short-term muscle action isokinetic training protocols elicit similar muscle size increases in hamstrings and quadriceps, but not for other neuromuscular variables. Nevertheless, effect sizes indicate that CON/ECC and ECC/ECC may elicit the greatest magnitude of change in muscle hypertrophy.

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“…Beck et al, (2007) suggested that responses to training might be influenced by the number of training sessions, training volume, and muscle(s) being tested [3]. Nevertheless, Akima et al, (1999) and Costa et al, (2013) suggested future studies should investigate the precise mechanisms underlying strength gains obtained with short-term resistance training [7,43].…”

Section: Discussionmentioning

confidence: 99%

Strength and Conditioning

Cardinale¹,

Newton²,

Nosaka³

2017

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While a graduate assistant, he was responsible for isokinetic performance testing specifically designed to determine human responses to high velocity training. Dr. Brown joined the faculty at Cal State Fullerton in 2002 and is the current Director of the Center for Sport Performance and the Human Performance Laboratory. Prior to coming to California, he spent two years at Arkansas State University in Jonesboro, Arkansas as Director of the Human Performance Laboratory. Before Arkansas he was in Florida for 16 years serving as Research Director for an orthopedic surgeon's office and teaching and coaching at the public school level. He was President of the National Strength and Conditioning Association (NSCA), the NSCA Foundation and SWACSM. He currently sits on the Board of Trustees at National ACSM and is a Fellow of both the ACSM and the NSCA. His research interests include sport performance, anaerobic assessment and high velocity neuromuscular adaptations. vii Preface to "Strength and Conditioning" This Special Issue provides knowledge related to strength and conditioning for fitness and sport performance. It is designed for those interested in the many topics that concern strength and conditioning, in relation to advanced scientific inquiries of program design, periodization of training and anaerobic strength, and power testing. Topics focus on postactivation potentiation, neuromuscular adaptations to resistance training, motor unit recruitment, and muscle fiber types. Emphases are placed on investigations leading to increased human performance through manipulation of bioenergetics, biomechanics, and the endocrine system. Additionally, practical applications to training and performance are stressed, so as to influence daily exercise protocols.

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Effects of short‐term resistance training and subsequent detraining on the electromechanical delay

Abstract: It can be hypothesized that increases in strength observed after a short-term resistance training program may not be attributed to stiffness changes in the series-elastic component.

Cited by 13 publications

References 22 publications

Changes in electromechanical delay during fatiguing dynamic muscle actions

Changes in electromechanical delay during fatiguing dynamic muscle actions

Different Muscle Action Training Protocols on Quadriceps-Hamstrings Neuromuscular Adaptations

Strength and Conditioning

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