Muscle Strength
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F1000Research ◽  
2021 ◽  
Vol 10 ◽  
pp. 945
Renan Souza ◽  
Adriano Alberti ◽  
Gabriel Gastélum Cuadras ◽  
Rodrigo Gomes de Souza Vale ◽  
Eliton Marcio Zanoni ◽  

Background: Dermatoglyphics is considered, in the scientific milieu, to be an epigenetic marker. The objective of this study was to analyze the presence of dermatoglyphic marks characteristic of neuromotor capacity and abdominal resistance in children and adolescents. Methods: This is a cross-sectional study. The sample consisted of 1,002 individuals, female children and adolescents between the ages of 10 and 16, from public and private schools in the city of Joaçaba, Santa Catarina, Brazil. The protocol selected for analyzing the fingerprints was dermatoglyphics, proposed by Cummins and Midlo using a Dermatoglyphic Reader. The Brazilian Sports Project Manual - PROESP 2015 was used to collect data on muscle strength motor tests. Results: The results showed the presence of a dermatoglyphic mark characteristic of abdominal motor capacity and muscle strength in females. A higher frequency of arches was identified in MET4 and whorls in MET5 and MDT4 in the Risk Zone group. In the Healthy Zone group, ulnar loop was found to be more frequent in MET4, MET5, and MDT4 fingers. Conclusions: The results demonstrated a predictive marker for abdominal motor capacity and strength in females through dermatoglyphics.

2021 ◽  
Hiroyuki Yamamoto ◽  
Fuminao Takeshima ◽  
Masafumi Haraguchi ◽  
Kayoko Matsushima ◽  
Moto Kitayama ◽  

Abstract Sarcopenia is defined as low skeletal muscle index (SMI) in addition to low muscle strength (MS) or low physical function, and many biomarkers have been reported. In Crohn's disease (CD), low SMI is associated with predictors and complications of intestinal resection. Therefore, in many reports of CD, sarcopenia was defined only by SMI. However, there have been no reports of MS in Japan. Our study aimed to investigate the frequency of sarcopenia by assessing both SMI and MS in Japanese patients with CD and biomarkers predicting low SMI. We evaluated SMI using bioelectrical impedance analysis, handgrip strength, and blood tests, including CRP, ALB, IL-6, TNFα, GDF-8, and GDF-15 as biomarker candidates for 78 CD patients in our hospital. Sarcopenia and low SMI were 8% and 42.3%, respectively. Each candidate biomarker and SMI were negatively correlated with GDF-15 (Pearson's r=-0.414, P = 0.0031) in males and positively correlated with ALB (r = 0.377, P = 0.048), and negatively correlated with IL-6 (r=-0.484, P = 0.012) in females. Multivariate analysis adjusted for these items, age, and BMI showed a significant difference in male GDF-15 (P = 0.011, OR: 7.86, 95% CI: 1.09–56.58). Therefore, GDF-15 in male patients is considered a biomarker of low SMI.

2021 ◽  
Vol 11 (1) ◽  
Rory Curtis ◽  
Catherine Willems ◽  
Paolo Paoletti ◽  
Kristiaan D’Août

AbstractThe human foot is uniquely adapted to bipedal locomotion and has a deformable arch of variable stiffness. Intrinsic foot muscles regulate arch deformation, making them important for foot function. In this study we explore the hypothesis that normal daily activity in minimal footwear, which provides little or no support, increases foot muscle strength. Western adults wore minimal footwear for a six-month period (the “intervention” group). Foot strength, i.e., maximum isometric plantarflexion strength at the metatarsophalangeal joints, and foot biometrics were measured before and after the intervention. An additional group was investigated to add further insight on the long-term effects of footwear, consisting of Western adults with an average 2.5 years of experience in minimal footwear (the “experienced” group). This study shows that foot strength increases by, on average, 57.4% (p < 0.001) after six months of daily activity in minimal footwear. The experienced group had similar foot strength as the post intervention group, suggesting that six months of regular minimal footwear use is sufficient to gain full strength, which may aid healthy balance and gait.

2021 ◽  
Vol 10 (2) ◽  
pp. 324
Rino M ◽  
Jufri Al Fajri

Fracture is a break in bone continuity and is determined according to its type and extent (Anita, 2015). Fractures caused by injuries include falls, traffic accidents and trauma to sharp or blunt objects. The trend of injury prevalence shows an increase from 7.5% in 2017 to 8.2% in 2018 (Kemenkes RI, 2018). This research is a quantitative research with pre-experimental research methods with one group pretest and posttest research design. This study was conducted to determine the effect of restoring muscle and joint strength in post-op patients with limb fracture in the working area of Muara Kumpeh puskemas. The research time is planned to be carried out on July 15, 2020 in the working area of the Muara Kumpeh Health Center. The population in this study was Post op fracture with a number of 84 people. The sample in this study was 15 people using purposive sampling method. Data collection was carried out by observing the respondents MMT (Manual Muscle Testing). research using the T-Test. The results showed that the average value of muscle and joint strength recovery in post-op limb fracture patients before therapy was 30.20 Mean while the average value of muscle and joint strength recovery in post-op limb fracture patients after being given therapy was 35.80 and the results showed The effect of restoring muscle and joint strength in post-op limb fracture patients in the working area of Muara Kumpeh Health Center with p-value (0,000) <α = 0.05. The conclusion of this study is the importance of ROOM therapy in post-op expression fracture patients. It is hoped that it can be used for patients to improve muscle strength systems and better recovery of mobilization activities

Tiago Rodrigues de Lima ◽  
Xuemei Sui ◽  
Luiz Rodrigo Augustemak de Lima ◽  
Diego Augusto Santos Silva

2021 ◽  
Vol 8 ◽  
Catarina Macedo ◽  
Teresa F. Amaral ◽  
Juliana Rodrigues ◽  
Fernanda Santin ◽  
Carla Maria Avesani

Aim: Sarcopenia and malnutrition are highly prevalent in older adults undergoing hemodialysis (HD) and are associated with negative outcomes. This study aimed to evaluate the role of sarcopenia and malnutrition combined on the nutritional markers, quality of life, and survival in a cohort of older adults on chronic HD.Methods: This was an observational, longitudinal, and multicenter study including 170 patients on HD aged &gt;60 years. Nutritional status was assessed by 7-point-subjective global assessment (7p-SGA), body composition (anthropometry and bioelectrical impedance), and appendicular skeletal muscle mass (Baumgartner's prediction equation). Quality of life was assessed by KDQoL-SF. The cutoffs for low muscle mass and low muscle strength established by the 2019 European Working group on sarcopenia for Older People (EWGSOP) were used for the diagnosis of sarcopenia. Individuals with a 7p-SGA score ≤5 were considered malnourished, individuals with low strength or low muscle mass were pre-sarcopenic, and those with low muscle mass and low muscle strength combined as sarcopenic. The sample was divided into four groups: sarcopenia and malnutrition; sarcopenia and no-malnutrition; no-sarcopenia with malnutrition; and no-sarcopenia and no-malnutrition. Follow-up for survival lasted 23.5 (12.2; 34.4) months.Results: Pre-sarcopenia, sarcopenia, and malnutrition were present in 35.3, 14.1, and 58.8% of the patients, respectively. The frequency of malnutrition in the group of patients with sarcopenia was not significantly higher than in the patients without sarcopenia (66.7 vs. 51.2%; p = 0.12). When comparing groups according to the occurrence of sarcopenia and malnutrition, the sarcopenia and malnutrition group were older and presented significantly lower BMI, calf circumference, body fat, phase angle, body cell mass, and mid-arm muscle circumference. In the survival analysis, the group with sarcopenia and malnutrition showed a higher hazard ratio 2.99 (95% CI: 1.23: 7.25) for mortality when compared to a group with no-sarcopenia and no-malnutrition.Conclusion: Older adults on HD with sarcopenia and malnutrition combined showed worse nutritional parameters, quality of life, and higher mortality risk. In addition, malnutrition can be present even in patients without sarcopenia. These findings highlight the importance of complete nutritional assessment in patients on dialysis.

A. Antonio Paoli ◽  
Laura Mancin ◽  
Massimiliano Caprio ◽  
Elena Monti ◽  
Marco V. Narici ◽  

Abstract Background A ketogenic diet (KD) is a nutritional approach, usually adopted for weight loss, that restricts daily carbohydrates under 30 g/day. KD showed contradictory results on sport performance, whilst no data are available on team sports. We sought to investigate the influence of a KD on different parameters in semi-professional soccer players. Methods Subjects were randomly assigned to a iso-protein (1.8 g/Kg body weight/day) ketogenic diet (KD) or western diet (WD) for 30 days. Body weight and body composition, resting energy expenditure (REE), respiratory exchange ratio (RER), cross sectional area (CSA) and isometric muscle strength of quadriceps, counter movement jump (CMJ) and yoyo intermittent recovery test time were measured. Results There was a significantly higher decrease of body fat (p = 0.0359), visceral adipose tissue (VAT) (p = 0.0018), waist circumference (p = 0.0185) and extra-cellular water (p = 0.0060) in KD compared to WD group. Lean soft tissue, quadriceps muscle area, maximal strength and REE showed no changes in both groups. RER decreased significantly in KD (p = 0.0008). Yo-yo intermittent test improved significantly (p < 0.0001) in both groups without significant differences between groups. CMJ significantly improved (p = 0.0021) only in KD. Conclusions This is the first study investigating the effects of a KD on semi-professional soccer players. In our study KD athletes lost fat mass without any detrimental effects on strength, power and muscle mass. When the goal is a rapid weight reduction in such athletes, the use of a KD should be taken into account. Trial registration registered retrospectively on Clinical Trial registration number NCT04078971.

Víctor Moreno-Pérez ◽  
Marc Madruga-Parera ◽  
Daniel Romero-Rodríguez ◽  
Javier Sanchéz-Sanchéz ◽  
José Luis Felipe ◽  

The COVID-19 pandemic has produced a major disruption for professional football leagues that has affected the physical preparation of both football players and referees. In Spain, health authorities decreed home confinement for eight weeks, supressing the normal training routines of professional referees. After home confinement, referees had four weeks to retrain as the national football league was set to resume matches to complete the 11 games remaining. The aim of the present investigation was to assess changes in eccentric hamstring muscle strength during football competition suspension/resumption due to the COVID-19 pandemic in 21 professional football referees (mean ± SD, age: 33.4 ± 5.1 years; height: 182.4 ± 5.0 cm; body mass: 75.1 ± 4.4 kg). Eccentric hamstring muscle strength was measured with the Nordic hamstring exercise at four time points. During home confinement, referees presented the lowest value of bilateral eccentric muscle strength (300 ± 14 N). Eccentric muscle strength increased by 13.2 ± 3.7% one week after the end of home confinement (339 ± 16 N; p = 0.001, effect size (ES) = 2.8) and remained stable before the first match (343 ± 17 N; p = 0.001, ES = 3.1) and after the end of the national league (328 ± 13 N; p = 0.001, ES = 2.0). In summary, home confinement produced detraining effects in professional football referees associated with hamstring muscle weakness. In this regard, strength-based activities with body loads may be insufficient to avoid muscle weakness and other means (e.g., weights) may be necessary to maintain muscle strength. However, the 4-weeks retraining period was sufficient to resolve hamstring muscle weakness induced by the restrictions of home confinement. This information may be helpful in the case of future sport competition suspension or home quarantine due to new waves of COVID-19 pandemic.

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