Maira Cristina Wolf Schoenell

Prevalência de dor nas costas e fatores associados em escolares do Ensino Fundamental do município de Teutônia, Rio Grande do Sul

OBJECTIVES: to determine the prevalence of back pain in elementary school students in the Teutonia school district and examine the association of demographic, behavioral and hereditary factors. METHODS: a cross-section of 743 students was examined in the course of research. The data was collected from a questionnaire composed of questions about back pain over the preceding 3 months as well as demographic, behavioral and hereditary questions, which were then analyzed using multivariate analysis and prevalence ratio (PR) calculations. RESULTS: the prevalence of back pain was 54.1% (n = 402), 17.4% of which reported that the pain made it impossible to carry out common everyday activities. Female students (PR=1.08; p=0.002), students active in physical exercise (PR=1.11; p=0.006) and students whose parents reported back pain (PR=1.19; p=0.001) all had a higher prevalence of back pain. CONCLUSIONS: the findings indicate that the high prevalence of back pain in students can be linked to gender, the practice of physical exercise and heredity. This information can be used in planning posture education programs in the Teutonia public school system.

Prevalência de hábitos posturais inadequados de escolares do Ensino Fundamental da cidade de Teutônia: um estudo de base populacional

Este estudo teve como objetivo verificar a prevalencia de habitos posturais inadequados de escolares do Ensino Fundamental da cidade de Teutonia, estado do Rio Grande do Sul, Brasil, a partir de um estudo de base populacional. Os 1597 escolares participantes responderam o questionario autoaplicavel denominado Back Pain and Body Posture Evaluation Instrument (BackPEI). Os resultados demonstraram alta prevalencia de habitos posturais inadequados nas seguintes posturas: sentar para escrever e para utilizar o computador, sentar em um banco, alem de pegar objeto do solo. Verificou-se tambem que os escolares permanecem por muito tempo na posicao sentada em frente ao computador e a televisao, e nao dormem a quantidade de horas necessaria por dia. Estudos desta natureza podem subsidiar o trabalho preventivo dos professores de Educacao Fisica, no ambiente escolar.

Effects of Different Concurrent Resistance and Aerobic Training Frequencies on Muscle Power and Muscle Quality in Trained Elderly Men: A Randomized Clinical Trial

Muscle power is a strong predictor of functional status in the elderly population and is required to perform different daily activities. To compare the effects of different weekly training frequencies on muscle power and muscle quality induced by concurrent training (resistance + aerobic) in previously trained elderly men. Twenty-four trained elderly men (65 ± 4 years), previously engaged in a regular concurrent training program, three times per week, for the previous five months, were randomly allocated to concurrent training programs in which training was performed either twice a week (2·week-1, n = 12) or three times per week (3·week-1, n = 12). The groups trained with an identical exercise intensity and volume per session for 10 weeks. Before and after the exercise training, we examined muscle power, as estimated by countermovement jump height; knee extensor isokinetic peak torque at 60 and 180o.s-1; and muscle quality, a quotient between the one-repetition maximum of the knee extensors and the sum of quadriceps femoris muscle thickness determined by ultrasonography. Additionally, as secondary outcomes, blood pressure and reactive hyperemia were evaluated. Two-way ANOVA with repeated measures were used and statistical significance was set at α = 0.05. Muscular power (2·week-1: 7%, and 3·week-1: 10%) and muscle quality (2·week-1: 15%, and 3·week-1: 8%) improved with the concurrent exercise training (p < 0.001) but with no differences between groups. The isokinetic peak torque at 60 (2·week-1: 4%, and 3·week-1: 2%) and 180o.s-1 (2·week-1: 7%, and 3·week-1: 1%) increased in both groups (p = 0.036 and p=0.014, respectively). There were no changes in blood pressure or reactive hyperemia with the concurrent training. Concurrent training performed twice a week promotes similar adaptations in muscular power and muscle quality when compared with the same program performed three times per week in previously trained elderly men.

Water-Based Concurrent Training Improves Peak Oxygen Uptake, Rate of Force Development, Jump Height, and Neuromuscular Economy in Young Women

Abstract Pinto, SS, Alberton, CL, Cadore, EL, Zaffari, P, Baroni, BM, Lanferdini, FJ, Radaelli, R, Pantoja, PD, Peyré-Tartaruga, LA, Wolf Schoenell, MC, Vaz, MA, and Kruel, LFM. Water-based concurrent training improves peak oxygen uptake, rate of force development, jump height, and neuromuscular economy in young women. J Strength Cond Res 29(7): 1846–1854, 2015—The study investigated the effects of different intrasession exercise sequences on the cardiorespiratory and neuromuscular adaptations induced by water-based concurrent training in young subjects. Twenty-six healthy young women (25.1 ± 2.9 years) were placed into 2 water-based concurrent training groups: resistance before (RA, n = 13) or after (AR, n = 13) aerobic training. Subjects trained resistance and aerobic training during 12 weeks, 2 times per week performing both exercise types in the same training session. Peak oxygen uptake (V[Combining Dot Above]O2peak), rate of force development (RFD) obtained during an isometric peak torque knee extension protocol, jump height, and neuromuscular economy (normalized electromyography at 80% of pretraining knee extension isometric peak torque) in young women were determined. After training, there was a significant increase (p < 0.001) in both RA and AR in the V[Combining Dot Above]O2peak, with no differences between groups (7 vs. 5%). The maximal isometric knee extension RFD showed significant increases (p = 0.003) after training (RA: 19 vs. AR: 30%), and both groups presented similar gains. In addition, the countermovement jump height also increased (p = 0.034) after training (RA: 5% vs. AR: 6%), with no difference between groups. After training, there were significant improvements on vastus lateralis (p < 0.001) (RA: −13% vs. AR: −20%) and rectus femoris (p = 0.025) (RA: −17% vs. AR: −7%) neuromuscular economy, with no difference between groups. In conclusion, 12 weeks of water-based concurrent training improved the peak oxygen uptake, RFD, jump height, and neuromuscular economy in young women independent from the intrasession exercise sequence.

Effects of Single Vs. Multiple Sets Water-Based Resistance Training on Maximal Dynamic Strength in Young Men

Abstract The aim of this study was to compare the effects of single vs. multiple sets water-based resistance training on maximal dynamic strength in young men. Twenty-one physically active young men were randomly allocated into 2 groups: a single set group (SS, n=10) and a multiple sets group (MS, n=11). The single set program consisted of only 1 set of 30 s, whereas the multiple sets comprised 3 sets of 30 s (rest interval between sets equaled 1 min 30 s). All the water-based resistance exercises were performed at maximal effort and both groups trained twice a week for 10 weeks. Upper (bilateral elbow flexors and bilateral elbow extensors, peck deck and inverse peck deck) as well as lower-body (bilateral knee flexors and unilateral knee extensors) one-repetition maximal tests (1RM) were used to assess changes in muscle strength. The training-related effects were assessed using repeated measures two-way ANOVA (α=5%). Both SS and MS groups increased the upper and lower-body 1RM, with no differences between groups. Therefore, these data show that the maximal dynamic strength significantly increases in young men after 10 weeks of training in an aquatic environment, although the improvement in the strength levels is independent of the number of sets performed.

Effects of Single Vs. Multiple Sets during 10 Weeks of Water-based Resistance Training on Neuromuscular Adaptations in Young Women

This study aims to analyze the neuromuscular adaptations of sedentary young women between water-based resistance training performed with single and multiple sets. 66 women (24.72±4.33 years old) were randomly divided into 2 training groups: SS (single set of 30 s) and MS (3 sets of 30 s). Both groups performed 2 sessions per week for 10 weeks. One repetition maximal test (1RM), muscle endurance test (maximal repetitions at 60% 1RM) and muscle power test (squat and countermovement jump performance) were evaluated at pre- and post-training. To compare neuromuscular variables, a repeated measures ANOVA with a group factor (α=0.05) was used. Both groups showed significant increases in 1RM (SS: 14.59%; MS 14.86%), in 60% 1RM (SS: 31.23%; MS: 37.37%), in SJ (SS: 10.9%; MS: 8.3%) and CMJ (SS: 9.1%; MS: 6.8%), without difference between groups. There can be concluded that young and sedentary women presented improvements in different expressions of strength after 10 weeks of training, regardless the volume of training.

Correlation and reproducibility testing abdominals in young women

The purpose of this study was to investigate possible correlations between the values of 1 minute abdominal tests, 2 minutes with bench, a repetition maximum, a repe- tition maximum with 70% of 1RM and maximum voluntary isometric contraction test and then, to verify the reproducibility of them in young women. The study was composed by 15 trained women (26.22 ± 4.67 ages). The tests were randomly performed in different days with minimum of 48 hours of interval between collections. After of 7-10 days interval, the tests were performed again. The present results suggested it is possible to conclude that abdominal tests present a good capacity of reproducibility. Besides this, the 1min and 2min tests have presented a good relation with the maximum strength test (1RM), however the maximum voluntary isometric contraction and repetition maximum with 70% of 1RM tests did not presented any correlation with the other tests.The purpose of this study was to investigate possible correlations between the values of 1 minute abdominal tests, 2 minutes with bench, a repetition maximum, a repetition maximum with 70% of 1RM and maximum voluntary isometric contraction test and then, to verify the reproducibility of them in young women. The study was composed by 15 trained women (26.22 ± 4.67 ages). The tests were randomly performed in different days with minimum of 48 hours of interval between collections. After of 7-10 days interval, the tests were performed again. The present results suggested it is possible to conclude that abdominal tests present a good capacity of reproducibility. Besides this, the 1min and 2min tests have presented a good relation with the maximum strength test (1RM), however the maximum voluntary isometric contraction and repetition maximum with 70% of 1RM tests did not presented any correlation with the other tests.

Correlación y reproducibilidad de diferentes tests abdominales en mujeres jóvenes

The purpose of this study was to investigate possible correlations between the values of 1 minute abdominal tests, 2 minutes with bench, a repetition maximum, a repe- tition maximum with 70% of 1RM and maximum voluntary isometric contraction test and then, to verify the reproducibility of them in young women. The study was composed by 15 trained women (26.22 ± 4.67 ages). The tests were randomly performed in different days with minimum of 48 hours of interval between collections. After of 7-10 days interval, the tests were performed again. The present results suggested it is possible to conclude that abdominal tests present a good capacity of reproducibility. Besides this, the 1min and 2min tests have presented a good relation with the maximum strength test (1RM), however the maximum voluntary isometric contraction and repetition maximum with 70% of 1RM tests did not presented any correlation with the other tests.The purpose of this study was to investigate possible correlations between the values of 1 minute abdominal tests, 2 minutes with bench, a repetition maximum, a repetition maximum with 70% of 1RM and maximum voluntary isometric contraction test and then, to verify the reproducibility of them in young women. The study was composed by 15 trained women (26.22 ± 4.67 ages). The tests were randomly performed in different days with minimum of 48 hours of interval between collections. After of 7-10 days interval, the tests were performed again. The present results suggested it is possible to conclude that abdominal tests present a good capacity of reproducibility. Besides this, the 1min and 2min tests have presented a good relation with the maximum strength test (1RM), however the maximum voluntary isometric contraction and repetition maximum with 70% of 1RM tests did not presented any correlation with the other tests.

CORRELAÇÃO E REPRODUTIBILIDADE DE TESTES ABDOMINAIS EM MULHERES JOVENS

The purpose of this study was to investigate possible correlations between the values of 1 minute abdominal tests, 2 minutes with bench, a repetition maximum, a repe- tition maximum with 70% of 1RM and maximum voluntary isometric contraction test and then, to verify the reproducibility of them in young women. The study was composed by 15 trained women (26.22 ± 4.67 ages). The tests were randomly performed in different days with minimum of 48 hours of interval between collections. After of 7-10 days interval, the tests were performed again. The present results suggested it is possible to conclude that abdominal tests present a good capacity of reproducibility. Besides this, the 1min and 2min tests have presented a good relation with the maximum strength test (1RM), however the maximum voluntary isometric contraction and repetition maximum with 70% of 1RM tests did not presented any correlation with the other tests.The purpose of this study was to investigate possible correlations between the values of 1 minute abdominal tests, 2 minutes with bench, a repetition maximum, a repetition maximum with 70% of 1RM and maximum voluntary isometric contraction test and then, to verify the reproducibility of them in young women. The study was composed by 15 trained women (26.22 ± 4.67 ages). The tests were randomly performed in different days with minimum of 48 hours of interval between collections. After of 7-10 days interval, the tests were performed again. The present results suggested it is possible to conclude that abdominal tests present a good capacity of reproducibility. Besides this, the 1min and 2min tests have presented a good relation with the maximum strength test (1RM), however the maximum voluntary isometric contraction and repetition maximum with 70% of 1RM tests did not presented any correlation with the other tests.

Prevalencia de los hábitos inadecuados de los estudiantes de la escuela primaria de la ciudad de Teutônia: un estudio de población

Este estudo teve como objetivo verificar a prevalencia de habitos posturais inadequados de escolares do Ensino Fundamental da cidade de Teutonia, estado do Rio Grande do Sul, Brasil, a partir de um estudo de base populacional. Os 1597 escolares participantes responderam o questionario autoaplicavel denominado Back Pain and Body Posture Evaluation Instrument (BackPEI). Os resultados demonstraram alta prevalencia de habitos posturais inadequados nas seguintes posturas: sentar para escrever e para utilizar o computador, sentar em um banco, alem de pegar objeto do solo. Verificou-se tambem que os escolares permanecem por muito tempo na posicao sentada em frente ao computador e a televisao, e nao dormem a quantidade de horas necessaria por dia. Estudos desta natureza podem subsidiar o trabalho preventivo dos professores de Educacao Fisica, no ambiente escolar.