Background:Force variability is related to many kinesiological and neuromuscular properties of the body. This study was conducted to evaluate the effect of type 2 diabetes mellitus (T2DM) and sex on the several fractal and entropy indices of force changing during the repetitive isokinetic exercise of knee flexion-extension.Methods:Fifty individuals were allowed to participate in the study, and they consist of 18 patients with short-term T2DM, 12 patients with long-term T2DM, and 20 gender/body mass index/ankle imposed to brachial pressure index and physical activity index-matched healthy control (HC) individuals. Torque of knee flexion-extension was recorded for each cycle of 40 isokinetic repetitions at a velocity of 150°/s. The slope across the peak of torques and nonlinear fractal and entropy features in the time series was calculated. Two-way univariate analysis of variance was used to analyze the effect of the groups and gender on the variables.Results:The slope of flexor peak torques was significantly less in the long-term T2DM than the other groups. However, the fractal features such as SD1 and 2 of Poincare plot and fractal dimension katz were significantly decreased in the T2DM groups than the HC and in the women than men. Alpha detrended fluctuation analysis and empirical hurts exponent increased in women of short-term T2DM than men.Conclusion:The force variability decreased in the T2DM as compared to HC and in women as compared to men. However, the randomness of force was significantly increased in women of short-term T2DM.

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BackgroundType 2 diabetes (T2DM) patients are subject to muscle weakness.ObjectivesThe aim of the study was an assessment of electromyographic (EMG) activity of knee muscles during isometric maximal voluntary contraction in the different disease durations of T2DM.MethodsEighteen patients with less than 10 years and twelve patients with more than 10 years of T2DM were compared with nineteen matched healthy control subjects. EMG of flexor and extensor muscles of knee concurrently with isometric maximal peak torque of knee flexion and extension at 75 degrees of knee flexion were recorded in three groups.ResultsIsometric maximal peak torque of extension and root mean squared (RMS) of vastus lateralis and medial hamstring in the healthy control was significantly higher than both patient groups. Whenever the maximal isometric peak flexion torque was not significantly different between groups, the mean power frequency (MPF) of flexor muscles especially medial hamstrings were higher in the short-term T2DM than healthy control groups. The two factors, gender and age, had significant effect on maximal peak torque and RMS of knee muscles.ConclusionsEMG could show the effect of T2DM, gender and age on knee muscles activity. It seems that the medial hamstring was the most sensitive muscle of knee compartment to show the effect of T2DM and difference of short and long-term T2DM in EMG study.

IntroductionDifferent types of headaches and TMJ click influence the masseter muscle activity. The aim of this study was to assess the trend of energy level of the electromyography (EMG) activity of the masseter muscle during open-close clench cycles in migraine without aura (MOA) and tension-type headache (TTH) with or without TMJ click.MethodsTwenty-five women with MOA and twenty four women with TTH participated in the study. They matched with 25 healthy subjects, in terms of class of occlusion and prevalence of temporomandibular joint (TMJ) with click. The EMG of both masseter muscles were recorded during open-close clench cycles at a rate of 80 cycles per minute for 15 seconds. The mouth opening was restricted to two centimeters by mandibular motion frame. Signal processing steps have been done on the EMG as: noise removing, smoothing, feature extraction, and statistical analyzing. The six statistical parameters of energy computed were mean, Variance, Skewness, Kurtosis, and first and second half energy over all signal energy.ResultsA three-way ANOVA indicated that during all the cycles, the mean of energy was more and there was a delay in showing the peak of energy in the masseter of the left side with clicked TMJ in MOA group compared to the two other groups, while this pattern occurred inversely in the side with no-clicked TMJ (P < 0.009). The variation of energy was significantly less in MOA group compared to the two other groups in the no-clicked TMJ (P < 0.003). However, the proportion of the first or second part of signal energy to all energy showed that TTH group had less energy in the first part and more energy in the second part in comparison to the two other groups (P < 0.05).ConclusionThe study showed different changes in the energy distribution of masseter muscle activity during cycles in MOA and TTH. MOA, in contrast to TTH, had lateralization effect on EMG and interacted with TMJ click.

Background: Sexual health as an essential component of life, has been affected by COVID-19 pandemic. Changing in sexual life has consequences for couples and society. A critical review of current literature on sexual function in general populations will shed light on possible determinants as well as at-risk groups. Thus, the aim of this systematic review is to assess the consequences of COVID-19 on sexual and reproductive health. Methods/Design: A systematic review of literature on data reporting changings of individuals’ sexual life during the COVID-19 pandemic will be performed. The scientific databases of PubMed, Embase, Scopus, Web of Science, ScienceDirect, the World Health Organization, as well as protocols and guideline related to sexual health, behaviors, function and practices will be systematically searched from the onset of the disease in the world until August 15, 2021. We will consider, appraise, and synthesize studies including the change of sexual function and behaviour (physical, emotional, mental and relational health), SRH-care and services (contraception, birth control, STIs management), and sexual rights (gender-based and sexual minorities violence). Screening of search results and extraction of data from included studies will be conducted cooperatively by two authors. The quality of the studies will be appraised and documented. Results will be compiled and presented in evidence tables. Risk of bias (the quality assessment) will be evaluated by two review authors using the Critical Appraisal Skills Programme (CASP) tool. This protocol has been conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses protocols (PRISMA-P) guidelines. Also, this protocol is registered in PROSPERO with number CRD42021275387.Discussion: Given the potential impacts of the COVID-19 pandemic on the people’s sexual life and reproductive health, this review aims to provide accurate information on different aspects of sexual function and behavior in populations from various age groups, cultures, and sexual orientations sexual health and reproductive care delivery (contraception, and birth control, SDTs management) and sexual rights (gender-based and sexual minority, sexual violence) to provide a better understanding of COVID-19 pandemic’s effect on people’s sexual lives The findings could be used by health planners and health care providers to address the adverse effects of this period on reproductive health and sexual lives. Systematic review registration: PROSPERO CRD42021275387