Abstract #70: Effect of tDCS over Motor Cortex on Isometric Rate of Force Development in Healthy Adults

Cates, Alexander; Lin, Randall; Wingeier, Brett

doi:10.1016/j.brs.2018.12.077

Cited by 3 publications

(3 citation statements)

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“…Halo Neuroscience (2016) found that 15 min of 2 mA bihemispheric tDCS administered via the Halo Sport device aggrandized vastly the RFD of non-dominant hand in healthy right-handed subjects during an isometric pinch force task. Likewise, Cates et al (2019) found the healthy right-handed subjects receiving 2 mA of anodal tDCS for 15 min exhibited enhancement in peak rate of force development (pRFD) of non-dominant ballistic thumb during and after stimulation compared to the sham condition. These results indicate that tDCS may contribute to the increases in RFD of the non-dominant limb.…”

Section: Discussionmentioning

confidence: 94%

Transcranial Direct Current Stimulation Enhances Muscle Strength of Non-dominant Knee in Healthy Young Males

Hanson

Wen

et al. 2021

Front. Physiol.

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Transcranial direct current stimulation (tDCS) has been applied in training and competition, but its effects on physical performance remain largely unknown. This study aimed to observe the effect of tDCS on muscular strength and knee activation. Nineteen healthy young men were subjected to 20 min of real stimulation (2 mA) and sham stimulation (0 mA) over the primary motor cortex (M1) bilaterally on different days. The maximal voluntary contraction (MVC) of the knee extensors and flexors, and surface electromyography (sEMG) of the rectus femoris (RF) and biceps femoris (BF) were recorded before, immediately after, and 30 min after stimulation. MVC, rate of force development (RFD), and sEMG activity were analyzed before and after each condition. MVC of the non-dominant leg extensor and flexor was significantly higher immediately after real stimulation and 30 min after stimulation than before, and MVC of the non-dominant leg flexor was significantly higher 30 min after real stimulation than that after sham stimulation (P < 0.05). The RFD of the non-dominant leg extensor and flexor immediately after real stimulation was significantly higher than before stimulation, and the RFD of the non-dominant leg extensor immediately after real stimulation and 30 min after stimulation was significantly higher than that of sham stimulation (P < 0.05). EMG analysis showed the root mean square amplitude and mean power frequency (MPF) of the non-dominant BF and RF were significantly higher immediately after real stimulation and 30 min after stimulation than before stimulation, and the MPF of the non-dominant BF EMG was significantly higher 30 min after real stimulation than that after sham stimulation (P < 0.05). Bilateral tDCS of the M1 can significantly improve the muscle strength and explosive force of the non-dominant knee extensor and flexor, which might result from increased recruitment of motor units. This effect can last until 30 min after stimulation, but there is no significant effect on the dominant knee.

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Section: Discussionmentioning

confidence: 94%

Transcranial Direct Current Stimulation Enhances Muscle Strength of Non-dominant Knee in Healthy Young Males

Hanson

Wen

et al. 2021

Front. Physiol.

View full text Add to dashboard Cite

show abstract

“…Halo Neuroscience found that 15 min of 2 mA bihemispheric tDCS administered via the Halo Sport device aggrandized vastly the RFD of non-dominant hand in healthy right-handed subjects during an isometric pinch force task [18]. Likewise, Cates et al found the healthy right-handed subjects receiving 2 mA of anodal tDCS for 15 min exhibited prominently enhancement in peak rate of force development (pRFD) of non-dominant ballistic thumb during and after stimulation compared to the sham condition [19]. These results indicate that tDCS may contribute to the increases in RFD of the non-dominant limb.…”

Section: Discussionmentioning

confidence: 99%

Transcranial Direct Current Stimulation Enhances Muscle Strength of Non-dominant Knee in Healthy Young Males

Hanson

Wen

et al. 2021

Preprint

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Background: Transcranial direct current stimulation (tDCS) has been applied in training and competition, but its effects on physical performance remain largely unknown. The present study aimed to observe the effect of tDCS on muscular strength and activation of the knee in healthy subjects. Methods: Nineteen healthy young males were subjected to 20 min real stimulation (2 mA) and sham stimulation (0 mA) on different days. The maximal voluntary contraction (MVC) of knee extensors and flexors and surface electromyography (sEMG) of the rectus femoris (RF) and biceps femoris (BF) were recorded before, immediately after, and 30 min after stimulation. MVC, rate of force development (RFD), and sEMG activity were analyzed before and after each condition. Results: MVC of left leg extensor and flexor was significantly higher immediately after real stimulation and 30 min after stimulation than before, and MVC of left leg flexor was significantly higher 30 min after real stimulation than that after sham stimulation (P < 0.05). The RFD of left leg extensor and flexor immediately after real stimulation was significantly higher than before stimulation, and the RFD of left leg extensor immediately after real stimulation and 30 min after stimulation was significantly higher than that of sham stimulation (P < 0.05). EMG analysis showed the root mean square amplitude(RMS) and mean power frequency (MPF) of left BF and RF were significantly higher immediately after real stimulation and 30 min after stimulation than before stimulation, and the MPF of left BF EMG was significantly higher 30 min after real stimulation than that after sham stimulation (P < 0.05). Conclusions: Bilateral tDCS of the primary motor cortex can significantly improve the muscle strength and explosive force of the non-dominant knee extensor and flexor, which is manifested by the increase of the amount of motor units recruited during exercise. This effect can last until 30 min after stimulation, but there is no significant effect on the dominant knee.

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“…To our knowledge, only few studies have examined potential tDCS effects on RFD. Cates et al [ 18 ] investigated tDCS effects on RFD in ballistic thumb movements and found an increase in RFD during anodal tDCS over primary motor cortex (M1), while another study reported increased RFD during isolated knee flexion and knee extension, following bilateral M1 stimulation [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

The impact of cerebellar transcranial direct current stimulation on isometric bench press performance in trained athletes

Kenville,

Clauß,

Berkow

et al. 2024

Heliyon

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Abstract #70: Effect of tDCS over Motor Cortex on Isometric Rate of Force Development in Healthy Adults

Cited by 3 publications

References 0 publications

Transcranial Direct Current Stimulation Enhances Muscle Strength of Non-dominant Knee in Healthy Young Males

Transcranial Direct Current Stimulation Enhances Muscle Strength of Non-dominant Knee in Healthy Young Males

Transcranial Direct Current Stimulation Enhances Muscle Strength of Non-dominant Knee in Healthy Young Males

The impact of cerebellar transcranial direct current stimulation on isometric bench press performance in trained athletes

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