Giustiniani Andreina, Battaglia Giuseppe, Messina Giuseppe, Morello Hely, Guastella Salvatore, Iovane Angelo, Oliveri Massimiliano, Palma Antonio, Proia Patrizia
IRCCS San Camillo Hospital, Venice, Italy.
NEUROFARBA Department, University of Florence, Florence, Italy.
Front Hum Neurosci. 2021 Apr 29;15:640609. doi: 10.3389/fnhum.2021.640609. eCollection 2021.
: This study is aimed to preliminary investigate whether transcranial alternating current stimulation (tACS) could affect explosive power considering genetic background in sport subjects. : Seventeen healthy sports volunteers with at least 3 years of sports activities participated in the experiment. After 2 weeks of familiarization performed without any stimulation, each participant received either 50 Hz-tACS or sham-tACS. Before and after stimulation, subjects performed the following tests: (1) the squat jump with the hands on the hips (SJ); (2) countermovement jump with the hands on the hips (CMJ); (3) countermovement jump with arm swing (CMJ-AS); (4) 15-s Bosco's test; (5) seated backward overhead medicine ball throw (SBOMBT); (6) seated chest pass throw (SCPT) with a 3-kg rubber medicine ball; and (7) hand-grip test. Additionally, saliva samples were collected from each participant. Genotyping analysis was carried out by polymerase chain reaction (PCR). : No significant differences were found in sport performance of subjects after 50 Hz-tACS. Additionally, we did not find any influence of genetic background on tACS-related effect on physical performance. These results suggest that tACS at gamma frequency is not able to induce an after-effect modulating sport performance. Further investigations with larger sample size are needed in order to understand the potential role of non-invasive brain stimulation techniques (NIBS) in motor performances. : Gamma-tACS applied before the physical performance fails to improve explosive power in sport subjects.
本研究旨在初步调查经颅交流电刺激（tACS）是否会考虑运动受试者的遗传背景而影响爆发力。17名有至少3年体育活动经历的健康运动志愿者参与了该实验。在进行2周无任何刺激的适应性训练后，每位参与者接受50赫兹tACS或伪tACS。在刺激前后，受试者进行了以下测试：（1）双手叉腰深蹲跳（SJ）；（2）双手叉腰反向跳（CMJ）；（3）摆臂反向跳（CMJ - AS）；（4）15秒博斯科测试；（5）坐姿向后过顶掷药球（SBOMBT）；（6）用3千克橡胶药球进行坐姿胸前传球（SCPT）；以及（7）握力测试。此外，从每位参与者处采集了唾液样本。通过聚合酶链反应（PCR）进行基因分型分析。50赫兹tACS后受试者的运动表现未发现显著差异。此外，我们未发现遗传背景对tACS相关的身体表现影响有任何作用。这些结果表明，伽马频率的tACS无法诱导调节运动表现的后效应。需要进行更大样本量进一步研究，以了解非侵入性脑刺激技术（NIBS）在运动表现中的潜在作用。在身体表现前施加伽马 - tACS未能提高运动受试者的爆发力。
