FLORA DE UM “BREJO DE ALTITUDE” DE PERNAMBUCO: RESERVA ECOLÓGICA DA SERRA NEGRA

A Reserva Ecológica da Serra Negra constitui–se um tabuleiro relictual de extensa cobertura sedimentar, situada no semi–árido Pernambucano. Circundada por uma vegetação característica do bioma caatinga, a Serra Negra representa um dos “brejos de altitude” do estado. Com o objetivo de subsidiar o plano de manejo da REBIO de Serra Negra, foi realizado o levantamento florístico da área, utilizando–se o método da Avaliação Ecológica Rápida. Para caracterizar a vegetação e flora, foram realizadas, no período de agosto a novembro de 2008, duas viagens a reserva. Foram selecionadas, através da análise de mapas da área, cinco transectos de 100m. As coletas fora da área dos transectos foram efetuadas através do método do caminhamento e de forma aleatória. O levantamento florístico resultou um total de 136 espécies, posicionadas em 48 famílias, sendo em torno de 70 delas coletadas no topo da serra, cerca de 58 na escarpa meridional e o restante na setentrional. As famílias mais significativas em número de espécies foram: Leguminosae e suas três subfamílias, com 13,97%; Asteraceae 12,5%, Euphorbiaceae 8,09%; Orquidaceae 5,88% e Myrtaceae com 5,15%, os outros táxons abrangendo 43 famílias mostram percentual de 54,41%. O estudo revelou diversidade alta de táxons no interior da floresta ombrófila

Comparison Between Pre-Exhaustion and Traditional Exercise Order on Muscle Activation and Performance in Trained Men

The purpose of this study was to measure the acute effects of pre-exhaustion vs. traditional exercise order on neuromuscular performance and sEMG in trained men. Fourteen young, healthy, resistance trained men (age: 25.5 ± 4.0 years, height: 174.9 ± 4.1 cm, and total body mass: 80.0 ± 11.1 kg) took part of this study. All tests were randomized and counterbalanced for all subjects and experimental conditions. Volunteers attended one session in the laboratory. First, they performed ten repetition maximum (10RM) tests for each exercise (bench press and triceps pushdown) separately. Secondly, they performed all three conditions at 10RM: pre-test (bench press and triceps pushdown, separately), pre-exhaustion (triceps pushdown+bench press, PE) and traditional (bench press+triceps pushdown, TR), and rested 30 minutes between conditions. Results showed that pre-test was significantly greater than PE (p = 0.031) but not different than TR, for total volume load lifted. There was a significant difference between the pre-test and the time-course of lactate measures (p = 0.07). For bench press muscle activity of the pectoralis major, the last repetition was significantly greater than the first repetition (pre-test: p = 0.006, PE: p = 0.016, and TR: p = 0.005). Also, for muscle activity of the triceps brachii, the last repetition was significantly greater than the first repetition (pre-test: p = 0.001, PE: p = 0.005, and TR: p = 0.006). For triceps pushdown, muscle activity of the triceps brachii, the last repetition was significantly greater than the first repetition (pre-test: p = 0.006, PE: p = 0.016, and TR: p = 0.005). For RPE, there were no significant differences between PE and TR (p = 0.15). Our results suggest that exercise order decreases repetitions performed, however, neuromuscular fatigue, lactate, and RPE are not impacted. The lack of difference in total volume load lifted between PE and TR might explain, at least in part, the similar metabolic and perceptual responses