ABSTRACT
BACKGROUND: Whole body vibration and electromyographic stimulation are often used as the main means of warming up or restoring activities before and after centrifugal exercise. However, it is unclear whether the two passive restoring methods can improve the explosive power of subjects, the range of motion of joints and the positive benefits of metabolic waste removal. OBJECTIVE: To reveal the benefits of whole body vibration and electromyographic stimulation in alleviating the muscle injury of basketball pitchers after pitching using whole body vibration and electromyographic stimulation to restore the shoulder joint, and provide important reference for basketball players and coaches to conduct scientific training and avoid sports injury caused by the change of pitching movements. METHODS: The study was approved by the Ethical Committee of Southwest Medical University, and the participants and their families signed the informed consents. Twelve college male basketball players volunteered to participate in this study. Repeated measurement and balanced sequence design were used to divide the experiment into whole body vibration recovery, electromyographic stimulation recovery and no treatment (control group); each time interval was 7 days. The participants were trained to shoot (5 innings, 25 balls/inning). After each inning, the pitchers were immediately restored for 6 minutes. The conscious muscle soreness index, range of motion, and serum contents of creatine kinase and myoglobin were detected at baseline, and 24,48 and 72 hours after pitching. RESULTS AND CONCLUSION: (1) Whole body vibration and electromyographic stimulation passive recovery modes had significant positive effects on alleviating conscious muscle soreness index, serum creatine enzyme and serum myoglobin of basketball pitchers, and there was no significant difference between two modes. (2) Whole body vibration passive recovery mode had significant positive effects on restoring shoulder range of motion, but electromyographic stimulation had no significant positive effect on shoulder rotation. (3) Whole body vibration and electromyographic stimulation electromyographic stimulation passive recovery modes showed no significant effect on the range of motion of recovery of elbow flexion and extension. (4) These results indicate that whole body vibration and electromyographic stimulation immediate passive recovery in basketball pitching training can significantly reduce the level of related indicators of muscle injury after pitching, but only whole body vibration treatment can significantly improve the joint range of motion.
ABSTRACT
O objetivo foi verificar a influência de diferentes formas de recuperações entre séries no desempenho das repetições e percepção subjetiva de esforço (PSE). Quatorze homens (20,61 ± 3,01 anos; 73,72 ± 6,03 kg; 175,08 ± 5,25 cm; 24,08 ± 2,1 kg/m²) realizaram teste e reteste de 10RM no supino horizontal em dias não consecutivos. Foram executadas quatro séries no supino horizontal para 10RM com intervalo de dois minutos e com diferentes procedimentos de recuperação: passivo e ativo (movimentos cadenciados similares à execução do supino horizontal). A ANOVA one-way demonstrou que para as duas recuperações, reduções progressivas ocorreram no número de repetições (1a < 2a < 3a < 4a série). Não foram observadas diferenças nas repetições entre recuperações tanto, em cada série, como para o número total de repetições na recuperação passiva (25,83 ± 5,51repetições) e na recuperação ativa (27,58 ± 3,75 repetições). Para a PSE verificada antes e após a execução das séries, ocorreram elevações a partir da terceira série para ambas as recuperações. Maiores valores da PSE para a recuperação ativa comparada com a recuperação passiva foram observados na quarta série. Concluímos que não ocorreram diferenças entre os protocolos de recuperação, porém com maior fadiga para a recuperação ativa.
Our aim was to verify the influence of different rest protocols between sets for the number of repetitions and perceived effort scale (PES). Fourteen trained men (20.61 ± 3.01 years; 73.72 ± 6.03 kg; 175.08 ± 5.25 cm; IMC = 24.08 ± 2.1 kg/m²) performed tests and retest of 10RM on the bench press in non-consecutive days. Subjects performed four sets of 10RM on bench press with two minute rest interval between sets, and two distinct rest procedures: passive and active recovery (cadenced movements similar to the bench press). The ANOVA one way demonstrated that for both recuperations, progressive reductions occurred on the number of repetitions (1a < 2a < 3a < 4a sets). No differences were shown between both rest protocols for each set, as well for the total number of repetitions on passive (25.83 ± 5.51repetitions) and active recovery (27.58 ± 3.75 repetitions). For the PES obtained before and after each set, significant elevations occurred from the third set for both recuperations. Higher values of PES for active recovery compared to passive recovery were shown on the fourth set. We concluded that no significant differences occurred between the recoveries protocols, although, higher values of effort were perceived at the active recovery.