Motricidade

Coach-athlete relationship and collective efficacy in volleyball: is the association explained by athletes’ goal orientations

The mediating role of goal orientations in the association between coach-athlete relationship (CAR) and collective efficacy (CE) was investigated. Participants were 185 Brazilian young volleyball players participants of a State championship. Data were obtained using the Coach-Athlete Relationship Questionnaire, Task and Ego Orientation in Sport Questionnaire and Collective Efficacy Questionnaire for Sports. Structural Equation Modeling revealed CAR had a moderate effect on task orientation. Task orientation was associated with CE. CAR had a positive effect on ego orientation. Ego orientation was not associated with CE. When the association between CAR and CE was mediated by task orientation, the relationship explained 27% of the CE variance. The results suggest that a good quality CAR allows athletes to be more focused on their goals and individual skill development, and, consequently, this type of focus allows the team to perform more effectively.

Pain perception and thermographic analysis in patients with chronic lower back pain submitted to osteopathic treatment

Introduction: Lower back pain (LBP), one of the main causes of pain, employee absenteeism and disabilities, exhibits a multifactorial and degenerative etiology, with different characteristics. Objective: a) analyze the acute effect of osteopathic treatment on the temperature of three dermatomes of patients with chronic lumbago; and b) assess the subjective pain perception of patients before and after an osteopathic session. Materials and methods: Quasi-experimental cross-sectional study of 14 individuals treated at a physical therapy clinic in Brasilia, Brazil. Data collection included physical therapy, pain scale (VAS), thermographic, and anthropometric assessment. Treatment consisted of a single osteopathic session. Results and conclusions: leg and foot temperature declined (∆% = 2.91 and 4.76%, respectively, p = 0005) in the innervations of 2 regions of interest (ROIs) of the L4 lower limb dermatome and pain levels decreased (∆% = 65.98 and 59.92%, p = 0.005) in the men and women, respectively. In addition, a strong correlation was observed between the maximum (r=0.742 and p-value = 0.002) and mean temperature variations of the lumbar region (r=0.733 and p-value = 0.003), according to the VAS. It was concluded that acute osteopathic treatment was efficient in varying the temperature at reference points of the dermatome analyzed and lowering pain perception, suggesting the effectiveness of the proposed treatment.

Effect of a teaching intervention on motivation, enjoyment, and importance given to Physical Education

This study sought to analyze how creating a task-oriented motivational climate through intervention affects various motivational variables, enjoyment, and the importance people attribute to physical education. A sample of sixth-grade elementary school students was used. Ages ranged from 11 to 12 years-old (M = 11.53, SD = .50). Groups were divided into an experimental group (n = 20), where a task-oriented climate was transmitted, and a control group (n = 20) that received no manipulation. A multivariate analysis of variance (MANOVA) was conducted on the data collected at the pretest. To detect intra-group differences between pre and posttest measures, a t-test for related samples was conducted in each group. Results revealed that the experimental group improved significantly more than the control group in social responsibility and social relationship goals, and scored higher on approach-mastery goals, basic psychological needs, intrinsic motivation, enjoyment, and importance attributed to physical education. They also exhibited lower external regulation and amotivation. The control group, conversely, had significantly lower intrinsic motivation posttest than the experimental group. We discuss the importance of transmitting a task-oriented motivational climate in physical education to accomplish positive motivational effects that favor enjoyment and interest in physical education.

Does the exercise order affect body composition in ten weeks of concurrent training?

This study aimed to observe if the order of the predominantly aerobic exercise, concerning the predominantly anaerobic exercises, in the concurrent training affects the body composition. Nine young males and nine young females were equitably dived into three groups that performed for ten weeks a concurrent training, differing between them in the order of the predominantly aerobic exercise in relation to the predominantly anaerobic exercises, with the objective to change the body composition: i) before; ii) after; and iii) interleaved. The measurements of the body composition were performed before (T0) and after ten weeks (T1) of concurrent training, a protocol using the dual-energy x-ray absorptiometry (DXA). It was observed a significant (p<0.05) reduction in the percentage of total body fat in all groups (25.75±9.34 to 25.08±9.38, 26.08±8.17 to 25.51±7.54, 28.20±4.29 to 26.45±5.56, T0 and T1, before, after and, interleaved, respectively). The total fat-free mass it was significantly increased in the after order group (50.74±11.82 kg to 51.01±11.85 kg, T0, and T1, respectively) and the upper limbs fat-free mass also significantly increased only in the before order group (6.66±2.64kg to 7.15±2.95kg, T0, and T1, respectively). No statistical differences were observed in any study variables between groups. Based on the data of the present study, the order of the predominantly aerobic exercise concerning the predominantly anaerobic exercises in the concurrent training did not influence the alterations in the body composition.

Correlation of arm cross-section areas with strength performance in practitioners of resistance training

It was our objective to analyse the correlation of the total, adipose, and muscular cross-section areas of the arm with the maximum voluntary strength performance of upper segments in practitioners of resistance training. A cross-sectional study was carried out with 32 healthy male subjects, right-handed and aged between 18 and 30 years at a fitness centre in the city of Fortaleza, Brazil. The maximum voluntary strength was measured by the maximal repetition test (1-MR) in unilateral exercises. A linear correlation was analysed using the Spearman test. Student's t-test was used for the quantitative analysis. A high correlation was obtained of the total cross-section area of the arm with the maximum voluntary biceps force (r= 0.72, p= 0.00) and the sum of loads (r= 0.73, p= 0.00). The muscle cross-section area of the arm showed moderate correlation with the maximum voluntary biceps force (r = 0.57, p= 0.00), triceps (r= 0.53, p= 0.00) and sum of loads (r= 0.59, p= 0.00). A low correlation was observed between the adipose cross-section area of the arm and the variables under analysis. In practitioners of resistance training, the increase in the total and muscle cross-section areas of the arm determines the increase in maximum voluntary strength in the upper segments.

Effect of Reduced Ankle Mobility on Jumping Performance in Young Athletes

The objective of this study was to analyse the effects of the reduction of ankle mobility on the jumping performance of young soccer athletes, through a validated jump platform valued and test. Twenty-one soccer players (16.19±0.60 years old, 67.26±5.94 kg weight, 173.81±8.15cm height, 11.29±5.37% estimated body fat, and 8.76±2.70 years of soccer practice) were evaluated and tested for vertical jump performance. Goniometry and Knee-to-Wall tests were adopted in order to evaluate movement, and a jump platform was used to evaluate performance. The performance in Counter Movement Jump test correlated positively and significantly not only with right dorsiflexion test but also right Knee-to-Wall test (r = 0.576; p = 0.006, r = 0.513, p = 0.17, respectively). Right Knee-to-Wall is correlated with left Knee-to-Wall (r = 0,816 p = 0,001). Based on the presented data, the vertical jump is impaired by the ankles' mobility deficit.

Depressive symptoms can change the lifestyle of the elderly: a cross-sectional case-control study

O objetivo do presente trabalho foi o de avaliar a frequência de sintomas depressivos, relação entre as variáveis sociodemográficas e o estilo de vida na população frequentadora dos Centros de Convivência da Terceira Idade. A amostra foi composta por 75 idosas (> 60 anos), matriculadas e frequentadoras ativas (mínimo três dias semanais) do Centro de Convivência da Terceira Idade, do bairro Maria Ortiz, do Município de Vitória/ES. Após a aplicação do questionário de identificação da sintomatologia depressiva as idosas foram distribuídas em dois grupos: com (28 idosas) e sem (47 idosas) sintomas depressivos. Foram analisados o perfil sócio demográfico, parâmetros antropométricos e estilo de vida. Após a análise da Escala Geriátrica de Depressão, 28 (37%) idosas apresentaram (p<0,01) sintomas depressivos (8 ± 3 pontos) e 47 (63%) não apresentaram sintomas (2 ± 2 pontos). Não foram encontradas diferenças estatísticas (p>0,05) entre os grupos entre os parâmetros antropométricos. Diferenças significativas (p<0,05) foram encontrados na classificação do estilo de vida, tendo maior prevalência do estilo regular (50%) no grupo sintomático em relação ao grupo assintomático, destacando 53% de muito bom. Foi encontrado correlação negativa (p<0,0001; r²:0,5779) entre os scores de sintomatologia depressiva e estilo de vida, indicando menor apresentação de sintomas com proporcional melhora no estilo de vida. Os resultados encontrados nesse estudo sugerem que idosas com estilo de vida desfavorável apresentam maior sintomatologia depressiva.

It was our objective to evaluate the frequency of depressive symptoms, the relationship between sociodemographic variables and lifestyle in the population attending the Third Age Cohabitation Centers. The sample consisted of 75 elderly women (> 60 years old), enrolled and active members (minimum three days a week) of the Third Age Living Center in the Maria Ortiz neighborhood of the city of Vitória / ES. After applying the questionnaire to identify the depressive symptomatology, the elderly were divided into two groups: with (n: 28) and without (n: 47) depressive symptoms. The socio demographic profile, anthropometric and lifestyle parameters were analyzed. After the analysis of the geriatric depression scale, 28 (37%) elderly had depressive symptoms (8 ± 3 points) and 47 (63%) had no symptoms (2 ± 2 points). No statistical differences (p>0.05) were found between the groups among the anthropometric parameters. Significant differences (p <0.05) were found in the classification of lifestyle, with a higher prevalence of regular style (50%) in the symptomatic group in relation to the asymptomatic group, with 53% being very good. A negative correlation (p<0.0001; r²:0.5779) was found between the scores of depressive symptomatology and lifestyle, indicating a lower presentation of symptoms with proportional improvement in lifestyle. The results found in this study suggest that elderly women with an unfavorable lifestyle present greater depressive symptomatology.

Acute aerobic exercise does not cause DNA damage in trained individuals after a running session

Performing long-duration exercise may increase oxygen consumption, which may result in redox imbalance inducing a frame of oxidative stress. The aim of the present study was to analyze the effects of EROS after a training session on the DNA of human lymphocytes and biochemical parameters (TBARS, triglycerides, proteins, glucose, albumin, and urea). A cross-sectional, descriptive and analytical study of 18 Caucasian individuals, males, between 18 and 35 years of age, underwent a continuous aerobic training session (60-minute run with intensity comprised between 70% and 75% of the maximum heart rate. The participants had a mean age of 21.78 ± 3.82 years; body mass 72.04 ± 6.35 kg; Height 1.79 ± 0.05 m, BMI of 22.37 kg/cm2 ± 1.70, fat mass 8.43 ± 3.97 %. Results showed a statistically significant increase in total protein, glucose and triglyceride levels post-exercise, while albumin decreased significantly post-exercise, whereas other biochemical parameters did not present significant change. DNA damage analysis showed no significant effects. We conclude that aerobic training in the conditions herein did not induce damage due to oxidative stress in the studied structures, probably because the individuals were well-trained and previously adapted to the conditions of exercise.

Impact of physical activity on the Body Mass Index and self-esteem of adolescents

The object of this study was to analyse the impact of the practice of physical activity on the body mass index (BMI) and self-esteem of adolescents. The samples included 1,011 adolescents, aged between 14 and 18 years. First the BMI was calculated, then the adolescents filled in the Rosenberg Self-esteem Scale (RSS) questionnaire and the International Physical Activity Questionnaire (IPAQ). Student's t-test and the chi-squared test were used for statistical analysis. The Odds Ratio and the Confidence Interval (95%) were also calculated. Female adolescents who are physically active have a 22.4% lower probability of developing overweight/obesity (OR=0.776, CI 95% 0.741-0.813) and 34.4% lower probability of presenting low self-esteem (OR=0.656, CI 95% 0.616-0.698). Participation in physical education classes reduces the probability that male adolescents will present low self-esteem by 88% (OR=0.120 CI 95% 0.043-0.339). In female adolescents, the practice of physical activity at school acts to prevent low self-esteem, as well as helping to control bodyweight increase. In male adolescents participation in physical education classes acts as a protection against low self-esteem.

Association between Physical Fitness and Cardiovascular Risk in Young University Students: Systematic Review

The aim of this systematic review was to analyse the association of physical fitness with risk factors for cardiovascular diseases in university students. Studies were collected from the following database: Medline, using the keywords: Physical fitness and cardiovascular risk, associated with keywords: Students and university. It was included epidemiological observational articles published between 2007 and 2017 written in English language. It was selected 4 quantitative cross-sectional studies, according to specific eligibility criteria, preferential Reporting Items for Systematic Reviews and Meta-Analyses protocol (PRISMA). The data extraction was done independently by different authors, including assessment of bias risk and classification of evidence rating. The results shown that university students have a sedentary behavior and low aerobic fitness, with high index of dyslipidaemia, central obesity, high blood pressure, therefore confirming many risk factors for cardiovascular diseases.