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Effects of Local Vibration on Dynamic Strength Training
Marcos D M Drummond1, Bruno P Couto2, Mariana P Oliveira1
1Department of Sports, School of Physical Education, Physiotherapy and Occupational Therapy, Laboratory of Load Evaluation and Laboratory of nutrition and sport training, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; and.
Journal of Strength and Conditioning Research
|March 8, 2022
Summary
Local vibration (LV) added to maximal dynamic strength training did not significantly enhance strength or muscle hypertrophy in trained individuals. Both conventional and vibration training groups showed similar improvements in maximal force and muscle thickness.
Area of Science:
- Sports Science
- Exercise Physiology
- Biomechanics
Background:
- Maximal dynamic strength training is a cornerstone for enhancing muscular strength and size.
- The integration of local vibration (LV) has been proposed as a method to augment training adaptations.
- However, its efficacy in conjunction with established maximal strength protocols in trained individuals requires further investigation.
Purpose of the Study:
- To compare the chronic effects of maximal dynamic strength training with and without local vibration (LV).
- To assess the impact on maximal force generation and muscle hypertrophy of the elbow flexor muscles.
- To determine if LV provides an additional stimulus beyond conventional training in trained subjects.
Main Methods:
- Twenty trained men were divided into two groups: conventional training (CT) and vibration training (VT).
- The VT group performed maximal dynamic strength training with mechanical vibrations (26 Hz, 6 mm amplitude).
- Both groups trained 3 times per week for 12 weeks, performing 5 sets of 3-4 repetitions with 2-minute rest intervals.
Main Results:
- Both CT and VT groups demonstrated significant increases in 1 repetition maximum (1RM) for elbow flexion exercises (EFO and EFSB).
- Significant improvements in maximal voluntary isometric contraction (MVIC) and elbow flexor muscle thickness were observed in both groups.
- Statistical analysis revealed no significant differences in the magnitude of increase in 1RM, MVIC, or muscle thickness between the CT and VT groups.
Conclusions:
- The addition of local vibration (LV) at 26 Hz and 6 mm amplitude does not provide an additional stimulus for strength and hypertrophy adaptations in trained individuals undergoing maximal dynamic strength training.
- Conventional maximal dynamic strength training remains highly effective for improving maximal force and muscle thickness.
- Further research may explore different vibration parameters or training populations to ascertain potential benefits of LV.
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