Muscle activation during resistance training with no external load - effects of training status, movement velocity, dominance, and visual feedback

2017 ◽  
Vol 179 ◽  
pp. 148-152 ◽  
Author(s):  
Paulo Gentil ◽  
Martim Bottaro ◽  
Matias Noll ◽  
Scott Werner ◽  
Jessica Cabral Vasconcelos ◽  
...  
Keyword(s):  
Resistance Training ◽  
Visual Feedback ◽  
External Load ◽  
Muscle Activation ◽  
Training Status ◽  
Movement Velocity ◽  
Load Effects

scholarly journals “NO LOAD” Resistance Training Promotes High Levels of Knee Extensor Muscles Activation—A Pilot Study

Diagnostics ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 526
Author(s):  
Rafael Ribeiro Alves ◽  
Carlos Alexandre Vieira ◽  
Martim Bottaro ◽  
Murilo Augusto Soares de Araújo ◽  
Daniel Costa Souza ◽  
...  
Keyword(s):  
Resistance Training ◽  
Visual Feedback ◽  
External Load ◽  
Muscle Activation ◽  
Vastus Lateralis ◽  
Load Resistance ◽  
Knee Extensors ◽  
Emg Activity ◽  
Functional Changes ◽  
Significant Difference

The present article aims to compare electromyographic (EMG) activity of the knee extensors during traditional resistance training (TRT) and no load resistance training with or without visual feedback (NL-VF and NL-NF). Sixteen healthy men (age: 25.2 ± 3.6) volunteered to participate in the study. Participants visited the laboratory on three occasions involving: (1) a 10 repetition maximum test (10 RM test), (2) familiarization and (3) performance of knee extensions using TRT, NL-VF and NL-NF in a random order, with 10 min of rest between them. TRT involved the performance of a set to momentary muscle failure using the 10 RM load. NL-NF involved the performance of 10 repetitions with no external load, but with the intention to maximally contract the muscles during the whole set. NL-VF involved the same procedure as NL-NF, but a monitor was positioned in front of the participants to provide visual feedback on the EMG activity. Peak and mean EMG activity were evaluated on the vastus medialis (VM), vastus lateralis (VL) and rectus femoris (RF). Results: there were no significant differences in VM and VL peak EMG activity among different situations. There was a significant difference for peak EMG activity for RF, where TRT resulted in higher values than NL-VF and NL-NF (p < 0.05). Higher values of mean EMG activity were found for VM, VL and RF during TRT in comparison with both NL-VF and NL-NF. Conclusions: resistance training with no external load produced high levels of peak muscle activation, independent of visual feedback, but mean activation was higher during TRT. These results suggest that training with no external load might be used as a strategy for stimulating the knee extensors when there is limited access to specialized equipment. Although the clinical applications of no load resistance training are promising, it is important to perform long-term studies to test if these acute results will reflect in muscle morphological and functional changes.

scholarly journals The Influence of Functional Flywheel Resistance Training on Movement Variability and Movement Velocity in Elite Rugby Players

2020 ◽  
Vol 11 ◽  
Author(s):  
Bruno Fernández-Valdés ◽  
Jaime Sampaio ◽  
Juliana Exel ◽  
Jacob González ◽  
Julio Tous-Fajardo ◽  
...  
Keyword(s):  
Resistance Training ◽  
Movement Variability ◽  
Movement Velocity ◽  
Rugby Players

Hypertrophy, Resistance Training, and the Nature of Skeletal Muscle Activation

1995 ◽  
Vol 9 (3) ◽  
pp. 155-159 ◽  
Author(s):  
Christine L. Ruther ◽  
Catherine L. Golden ◽  
Robert T. Harris ◽  
Gary A. Dudley
Keyword(s):  
Skeletal Muscle ◽  
Resistance Training ◽  
Muscle Activation

Classification and Determination Model of Resistance Training Status

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Evaldo Rui T. Santos Junior ◽  
Belmiro F. de Salles ◽  
Ingrid Dias ◽  
Alex S. Ribeiro ◽  
Roberto Simão ◽  
...  
Keyword(s):  
Resistance Training ◽  
Training Status

scholarly journals The effects of interset rest duration on performance and muscle activation during resistance training

2020 ◽  
Vol 1529 ◽  
pp. 022025
Author(s):  
Mohamad Shahrul Azzfar Mohamad Azzeme ◽  
Kevin Tan ◽  
Muhammad Hannan Sazali ◽  
Siti Jameelah Md Japilus ◽  
Ebby Waqqash ◽  
...  
Keyword(s):  
Resistance Training ◽  
Muscle Activation

The Addition of Real-time Ultrasound Visual Feedback to Manual Facilitation Increases Serratus Anterior Activation in Adults With Painful Shoulders: A Randomized Crossover Trial

2020 ◽  
Author(s):  
Leanda J McKenna ◽  
Luke Bonnett ◽  
Kelly Panzich ◽  
Jacinta Lim ◽  
Snorre K Hansen ◽  
...  
Keyword(s):  
Real Time ◽  
Visual Feedback ◽  
Muscle Activation ◽  
Crossover Trial ◽  
Physical Therapist ◽  
Pain Syndrome ◽  
Serratus Anterior ◽  
Subacromial Pain Syndrome ◽  
Randomized Crossover Trial ◽  
To Receive

Abstract Background Serratus anterior (SA) muscle activation may be decreased with subacromial pain syndrome. Determining whether real-time ultrasound (RTUS) can improve SA muscle activation may improve physical therapist interventions for subacromial pain syndrome. Objective The objective of this study was to determine whether the addition of RTUS visual feedback increased the activation of SA in adults with painful shoulders in comparison to manual facilitation alone. Design This was an assessor-masked, 2-period, randomized crossover trial. Setting The setting was a university medical imaging laboratory. Participants Adults with mild to moderate unilateral subacromial pain received both interventions in random order with at least a 1-week washout between interventions. Fourteen participants were randomized to receive manual facilitation with RTUS first, and 13 were randomized to receive manual facilitation only first. Intervention The intervention was 15 repetitions of a supine “serratus punch” facilitated by manual facilitation with RTUS visual feedback or manual facilitation alone. Measurements Levels of SA activation were measured with surface electromyography normalized to a maximal voluntary isometric contraction. Results A total of 25 participants completed the full trial of both interventions. Data from 25 participant periods for RTUS with manual facilitation and data from 26 participant periods for manual facilitation only were analyzed. The predicted marginal mean difference between interventions was 55.5% (95% CI = 13.9% to 97.1%) (P = .009), favoring the addition of RTUS feedback. No adverse effects occurred. Limitations The results are applicable only to mild to moderate levels of shoulder pain, and it is unknown whether the addition of RTUS visual feedback reduces pain or disability. Conclusion Manual facilitation with RTUS visual feedback increased SA activation in adults with painful shoulders compared with manual facilitation alone. Impact Determining if real-time ultrasound (RTUS) can improve SA muscle activation may help clinicians improve physical therapist interventions for subacromial pain syndrome.

Association between regional differences in muscle activation in one session of resistance exercise and in muscle hypertrophy after resistance training

2011 ◽  
Vol 112 (4) ◽  
pp. 1569-1576 ◽  
Author(s):  
Taku Wakahara ◽  
Naokazu Miyamoto ◽  
Norihide Sugisaki ◽  
Koichiro Murata ◽  
Hiroaki Kanehisa ◽  
...  
Keyword(s):  
Resistance Training ◽  
Resistance Exercise ◽  
Regional Differences ◽  
Muscle Activation ◽  
Muscle Hypertrophy

scholarly journals Effects of Different Combinations of Concentric and Eccentric Resistance Training Programs on Traditional and Alternative Hamstrings-to-Quadriceps Ratios

Sports ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 221 ◽  
Author(s):  
Cassio V. Ruas ◽  
Ronei S. Pinto ◽  
Guy G. Haff ◽  
Camila D. Lima ◽  
Lee E. Brown
Keyword(s):  
Resistance Training ◽  
Injury Risk ◽  
Muscle Activation ◽  
Training Programs ◽  
Knee Extension ◽  
Muscle Size ◽  
Ligament Injury ◽  
Knee Ligament ◽  
Knee Ligament Injury ◽  
Muscle Balance

Resistance training is often recommended for combined increases in traditional and alternative hamstrings-to-quadriceps (H:Q) ratios in order to reduce knee strength imbalance and associated hamstrings and knee ligament injury risk. The aim of this study was to investigate the effect of different concentric and eccentric resistance training programs on traditional and alternative H:Q ratios. Forty male volunteers were assigned to one of 4 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 (control (CNTRL), n = 10). Traditional conventional (CR) and functional (FR), alternative rate of torque development (RTD), muscle size (MS), and muscle activation (MA) H:Q ratios were measured before and after six weeks of unilateral nondominant knee extension–flexion resistance training performed on an isokinetic dynamometer. The ECC/ECC training significantly increased FR (pre = 0.75 ± 0.11; post = 0.85 ± 0.15), whereas the lack of training (CNTRL) decreased the RTD H:Q ratio (pre = 1.10 ± 0.67; post = 0.73 ± 0.33). There were no differences between groups for the other traditional and alternative ratios following resistance training protocols. These findings suggest eccentric exercise for quadriceps and hamstrings as the most beneficial training program for inducing increases in the traditional FR. However, different resistance training strategies may be needed to also elicit increases in the alternative RTD, MS, and MA H:Q ratios for fully restoring muscle balance and reducing potential hamstrings and knee ligament injury risk.

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