Mikhail Santos Cerqueira

Whole body vibration improves maximum voluntary isometric contraction of knee extensors in patients with chronic kidney disease: A randomized controlled trial

ABSTRACT Background: Whole body vibration (WBV) training improves maximum voluntary isometric contraction (MVIC) of knee extensors, postural balance, functional capacity, and quality of life (QOL) in several diseases. The objective was to assess the efficacy of WBV training in patients with chronic kidney disease (CKD) on hemodialysis (HD) in the interdialytic period. Method: A randomized, controlled trial study with concealed allocation, intention-to-treat analysis, and triple blinding. Sixteen patients with CKD of both genders aged over 40 years were allocated in two groups, the WBV group or the sham group, training 2 times a week for 12 weeks. The primary outcome was knee extensor muscle strength, and the secondary outcomes were quadriceps thickness, distance walked, balance, and QOL. Results: The WBV group improved MVIC of knee extensors with a difference between groups in improvement of 117.29 N (95% CI, 32.25–202.24) at the end of training. The other outcomes were not different between groups. Practical applications: The WBV program has shown to be effective and may be able to help in prescribing the appropriate training program for CKD. Conclusion: WBV training improves MVIC of knee extensors in patients with CKD on HD in the interdialytic period. WBV training could be considered in the management of patients with CKD.

Upper limbs total occlusion pressure assessment: Doppler ultrasound reproducibility and determination of predictive variables.

Total occlusion pressure (TOP) is an important variable to ischaemic exercise training because the optimal pressure of flow restriction (OPR), applied during this exercise modality, is derived from it. Despite the common use of Doppler ultrasound (DU) to determine the TOP, the reproducibility of this assessment was not evaluated yet. Given this, the objective was to evaluate the reproducibility of DU for the measurement of TOP in upper limbs and determine the predictive variables. Thirteen male volunteers attended three times to the laboratory. On the 1st day, we assessed arm circumference (AC), systolic blood pressure (SBP) and diastolic (DBP), and brachial artery TOP. On 2nd and 3rd days, only TOP was assessed. We found a coefficient of variation of 5·6% and an intraclass correlation coefficient of 0·795 for the DU. In the analysis of TOP predictive variables, the Spearman coefficients (R) were 0·813 (SBP), 0·786 (DBP) and 0·388 (AC). Therefore, these results support that DU has good reproducibility for the TOP and that SBP and DBP should be considered to the determination of TOP in upper limbs.

Comparação da temperatura local após diferentes métodos de resfriamento tecidual

INTRODUCAO: O resfriamento tecidual com fins terapeuticos tem sido referenciado como crioterapia, e seu uso no campo esportivo amplamente difundido. E descrito na literatura que a forma e o local de aplicacao podem influenciar o nivel de resfriamento. OBJETIVOS: Comparar o resfriamento cutâneo obtido pela aplicacao de duas modalidades de crioterapia, bolsa de gelo e bolsa de gel. METODOS: Dez voluntarios foram submetidos a tres procedimentos com duracao de 20 minutos cada: bolsa de gel (GEL), bolsa de gelo (GELO) e exposicao a temperatura ambiente (CONTROLE). O resfriamento foi realizado na regiao anterolateral da perna e em tres dias distintos, sendo a ordem de execucao randomica. A temperatura superficial foi mensurada na regiao anterolateral da perna com um termometro infravermelho previamente (PRE) e imediatamente apos cada procedimento (POS). Para comparacao dos valores da temperatura superficial local das medidas PRE e POS de cada procedimento foi utilizado ANOVA com medidas repetidas (tres grupos x duas medidas). Foi adotado o nivel de significância de p<0,05. RESULTADOS: Houve diferenca significativa da temperatura local entre as medidas PRE e POS para os procedimentos GEL e GELO (p<0,05). A comparacao da variacao da temperatura mostrou maior queda da temperatura na condicao GELO, alcancando temperaturas dentro da fixa de resfriamento terapeutica (i.e., < 13 o C). A condicao GEL tambem causou queda significativa da temperatura superficial quando comparado a condicao CONTROLE, no entanto, nao alcancou temperaturas dentro da faixa terapeutica. CONCLUSOES: O resfriamento tecidual atraves de bolsa de gelo e mais eficaz quando comparado a bolsa de gel.