A presente pesquisa teve como objetivo apresentar os diferentes conceitos relativos a bacias hidrográficas e realizar a caracterização morfométrica da microbacia do córrego Marivan localizada no município de Araraquara (SP). Diferentes definições referentes ao conceito de bacias hidrográficas foram discutidas e sistematizadas. Para a caracterização morfométrica da microbacia do córrego Marivan foi utilizado um mapa topográfico na escala 1:10.000 cedido pelo Departamento Autônomo de Água e Esgoto de Araraquara (DAAE). Os resultados indicam que a microbacia do córrego Marivan é pouco ramificada, com uma área de 2,1 km² e perímetro de 5,37 km. O comprimento do canal principal é de 1,37 km com uma rede de drenagem total de 1,43 km. Possui uma baixa capacidade de drenagem e densidade hidrográfica. O fator de forma e o índice de circularidade indicam que o perímetro da bacia aproxima-se a um círculo, o que favorece os processos de inundação (cheias rápidas). Concluise que a análise de aspectos relacionados à drenagem, relevo e geologia pode levar à elucidação e compreensão de diversas questões associadas à dinâmica ambiental local, todavia nenhum desses índices, isoladamente, deve ser entendido como capaz de simplificar a complexa dinâmica da bacia, a qual inclusive tem magnitude temporal.

Objective: To evaluate characteristics of physical activities in daily life in COPD patients in Brazil, correlating those characteristics with physiological variables. Methods: Physical activities in daily life were evaluated in 40 COPD patients (18 males; 66 ± 8 years of age; FEV 1 = 46 ± 16 % of predicted; body mass index = 27 ± 6 kg/m 2 ) and 30 healthy age-and gender-matched subjects, using a multiaxial accelerometer-based sensor for 12 h/day on two consecutive days. We also assessed maximal and functional exercise capacity, using the incremental exercise test and the six-minute walk test (6MWT), respectively; MIP and MEP; peripheral muscle force, using the one-repetition maximum test and the handgrip test; quality of life, using the Saint George's Respiratory Questionnaire (SGRQ); functional status, using the London Chest Activity of Daily Living questionnaire; and dyspnea sensation, using the Medical Research Council (MRC) scale. Results: Mean walking time/day was shorter for COPD patients than for the controls (55 ± 33 vs. 80 ± 28 min/day; p = 0.001), as movement intensity was lower (1.9 ± 0.4 vs. 2.3 ± 0.6 m/s 2 ; p = 0.004). The COPD patients also tended to spend more time seated (294 ± 114 vs. 246 ± 122 min/day, p = 0.08).Walking time/day correlated with the 6MWT (r = 0.42; p = 0.007) and maximal workload (r = 0.41; p = 0.009), as well as with age, MRC scale score and SGRQ activity domain score (−0.31 ≤ r ≤ −0.43; p ≤ 0.05 for all). Conclusions: This sample of Brazilian patients with COPD, although more active than those evaluated in studies conducted in Europe, were less active than were the controls. Walking time/day correlated only moderately with maximal and functional exercise capacity.Keywords: Pulmonary disease, chronic obstructive; Motor activity; Exercise tolerance. ResumoObjetivo: Avaliar as características de atividades físicas na vida diária de pacientes portadores de DPOC no Brasil e sua relação com diferentes variáveis fisiológicas. Métodos: Foram avaliados 40 pacientes portadores de DPOC (18 homens; 66 ± 8 anos; VEF 1 = 46 ± 16 % predito; índice de massa corpórea = 27 ± 6 kg/m 2 ) e 30 idosos saudáveis pareados por gênero e idade quanto às atividades físicas na vida diária, utilizando-se um acelerômetro multiaxial por 12 h/dia durante dois dias consecutivos. Foram ainda avaliados as capacidades máxima e funcional de exercício através do teste incremental máximo e do teste de caminhada de seis minutos (TC6), respectivamente; PImáx e PEmáx; força muscular periférica através dos testes de uma repetição máxima e de força de preensão manual; qualidade de vida através de Saint George's Respiratory Questionnaire (SGRQ); estado funcional através do questionário London Chest Activity of Daily Living; e sensação de dispneia através da escala do Medical Research Council (MRC). Resultados: Os pacientes portadores de DPOC apresentaram menor tempo de caminhada/ dia quando comparados aos idosos saudáveis (55 ± 33 vs. 80 ± 28 min/dia; p = 0,001) e menor intensidade de movimento (1,9 ± 0,4 vs. 2,...

Cunha PM, Nunes JP, Tomeleri CM, Nascimento MA, Schoenfeld BJ, Antunes M, Gobbo LA, Teixeira D, and Cyrino ES. Resistance training performed with single and multiple sets induces similar improvements in muscular strength, muscle mass, muscle quality, and IGF-1 in older women: A randomized controlled trial. J Strength Cond Res 34(4): 1008–1016, 2020—The purpose of this study was to compare the effects between single set vs. multiple sets of resistance training (RT) on measures of muscular strength, muscle mass, muscle quality (MQ), and insulin-like growth factor 1 (IGF-1) in untrained healthy older women. Sixty-two older women were randomly assigned to 1 of the 3 groups: single-set RT (SS, n = 21), multiple-sets RT (MS, n = 20), or nontraining control (CG, n = 21). Both training groups performed RT for 12 weeks, using 8 exercises of 10–15 repetitions maximum for each exercise. The SS group performed only 1 set per exercise, whereas MS performed 3 sets. Anthropometry, muscle strength (1RM tests), lean soft tissue (LST), and MQ from upper limbs (UL) and lower limbs (LL), and IGF-1 were measured before and after training. Both training groups showed significant pre-training to post-training increases for UL1RM (SS: 37.1%, MS: 27.3%, CG: −3.0%), LL1RM (SS: 16.3%, MS: 21.7%, CG: −0.7%), ULLST (SS: 7.8%, MS: 8.8%, CG: −1.1%), LLLST (SS: 5.6%, MS: 6.3%, CG: −0.8%), upper-limb muscle quality (SS: 25.2%, MS: 16.7%, CG: −0.2%), lower-limb muscle quality (SS: 10.5%, MS: 15.4%, CG: −3.5%), and IGF-1 (SS: +7.1%, MS: +10.1%, CG: −2.2%). We conclude that both SS and MS produce similar increases in muscular strength, LST, and MQ of upper and lower limbs, and IGF-1 after 12 weeks of RT in untrained older women. Our results suggest that, in the early stages, the RT regardless number of sets is effective for improving muscular outcomes in this population.

Postural instability is a common problem among older people, and it is associated with mobility impairments, activity limitation and fear of falling. The evaluation of postural control can contribute to the early detection of balance deficits and help health professionals to manage this problem to prevent falls in older adults. The aim of this study was to identify center of pressure cut-offs to differentiate between older adults with and without falls in the past 12 months. The participants were 170 older adults (mean age 67 years, 50 fallers and 120 non-fallers). Center of pressure area and sway velocity in the anterior-posterior and medio-lateral directions were assessed using a force platform during three 30s one-legged stance trials with eyes open. The mean across trials was used for analysis. The time-limit (how long the participant was able to stay in one-legged stance, up to 30s) was also assessed. Fallers had poorer postural control than non-fallers (effect size ≥ 0.52, P <0.05). The cut-offs identified were 10.3 cm2 for Center of pressure area, 2.9 cm/s for velocity in the anterior-posterior, and 3.4 cm/s for medio-lateral velocity. The force platform parameters obtained an area under the curve of 0.72, with sensitivity of 78% and specificity of 68%. There were no significant differences between non-fallers and fallers for time-limit variable (17 seconds vs. 18 seconds). Force platform parameters during one-legged stance were associated with history of falls in older adults. The cut-offs obtained acceptable area under curve, sensitivity and specificity, with center of pressure area presenting the best performance to differentiate between fallers and non-fallers.

No abstract