Effects of High-Intensity Warm-Up on 5000-Meter Performance Time in Trained Long-Distance Runners

Warm-up protocols with high intensities before continuous running provide potential benefits for middle-distance runners. Nevertheless, the effect of high-intensity warm-ups on long-distance runners remains unclear. The purpose of this study was to verify the effect of a high-intensity warm-up protocol on 5000 m performance in trained runners. Thirteen male runners (34 ± 10 years, 62 ± 6 kg, 62.7 ± 5.5 ml/kg/min) performed two 5000 m time trials, preceded by two different warm-ups. One high-intensity warm up (HIWU: 1x 500 m (70% of the running intensity) + 3x 250 m (100% of the running intensity) and one low-intensity warm up (LIWU: 1x 500 m (70% of the running intensity) + 3x 250 m (70% of the running intensity)), where the running intensities were calculated using the results obtained in the Cooper test. Physiological and metabolic responses, and endurance running performance parameters, were evaluated by the Counter Movement Jump (CMJ), running rating of perceived exertion (RPE), blood lactate concentration (BLa), and performance running. Total time for the 5000 m was lower using HIWU when compared to LIWU (1141.4 ± 110.4 s vs. 1147.8 ± 111.0 s; p = 0.03; Hedges' g = 0.66). The HIWU warm-up led to an improvement in pacing strategy during the time trial. After warm-up protocols, the performance on the CMJ was improved only when applying HIWU (p = 0.008). Post warm-up BLa was significantly higher for HIWU vs. LIWU (3.5 ± 1.0 mmol·L-1 vs. 2.3 ± 1.0 mmol·L-1; p = 0.02), with similar behavior for the RPE (p = 0.002), internal load of the session (p = 0.03). The study showed that a high-intensity warm-up protocol can improve performance in the 5000 m in trained endurance runners

Lessons on direct seeding to restore Neotropical savanna

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Antibiotic Resistance among <i>Escherichia coli</i>: Isolates and Novel Approaches to the Control of <i>E. coli</i> Infections

Bacteria are the microorganisms that most frequently cause infectious diseases in humans. The synthesis of silver nanoparticles (AgNPs) has attracted interest due to the new and different physical and chemical characteristics with applications in new fields. AgNPs, alone or supported on ceramic, are used as antimicrobial fillers in textiles and polymers for food-packaging and biomedical applications, for antimicrobial paints, and potentially for drug delivery. The evaluation of mesoporous nanostructures or nanocomposites as FDU-12/lignin/silver was effective in inhibiting Staphylococcus aureus, E. coli, Enterococcus faecalis, and Candida albicans. The best results were achieved against the inhibition of E. coli and with the structures FDU-12/silver. In plates with FDU-12/lignin/silver, FDU-12, FDU-12/lignin, and the positive control, it was enumerated at 0, 6, 14, and 27 colonies, respectively. While the development of resistance to a new antibiotic is expected, the time course and degree of resistance are uncertain and depend on various factors. The application of AgNPs as nanocomposites can alter the expression of bacterial proteins and could be used for inactivation. This review explores such aspects and a number of factors arising like the use of nanostructures against E. coli, from the knowledge acquired

Quais são os fatores de risco para readmissão em pacientes com ileostomia?

OBJETIVO: o objetivo deste estudo foi identificar os fatores de risco para readmissão em pacientes submetidos à cirurgia colorretal. MÉTODOS: um banco de dados de avaliação da qualidade colorretal em um único centro foi consultado para pacientes submetidos à procedimentos colorretais com ileostomia em 2009. A amostra foi dividida em readmitidos versus não readmitidos. A readmissão foi definida como a admissão dentro dos primeiros 30 dias após o procedimento índice. os grupos foram comparados em relação à características pré, intra e pós-operatórias. A análise multivariada foi realizada para identificar os fatores de risco para readmissão. RESULTADOS: a consulta identificou 496 pacientes, [267 (54%) do sexo masculino, idade média de 48 anos (VIQ: 34 -60)]. oitenta e três (17%) foram readmitidos; 296 pacientes (60%) foram operados por doença inflamatória intestinal, 89 (18%) por câncer, 16 (3%) por doença diverticular e 95 (19%) devido a outro diagnóstico. os três procedimentos mais comuns foram proctocolectomia total com anastomose anal e bolsa ileal (IPAA) em 103 pacientes (21%), colectomia total com ileostomia final em 117 (24%) e ressecções do intestino delgado (incluindo a remoção de fístula enterocutânea e excisão da bolsa em J) em 149 (30%). As seguintes variáveis foram significativamente mais comuns em pacientes readmitidos: tabagismo atual (24 % vs. 14%, p = 0,02), TVP/EP pós-operatório (10% vs. 4 %, p = 0,04), infecção da ferida cirúrgica (20 % vs. 10% p = 0,01), sepse (22% vs. 8%, p < 0,001) e infecção de órgão/espaço do sítio cirúrgico (IOSC) (35 % vs. 5%, p < 0,001). A infecção do IOSC pós-operatório foi o único fator independente associado com a readmissão na análise multivariada (p < 0,001). CONCLUSÃO: os cirurgiões colorretais devem estar alertas para IOSC diante de um paciente com ileostomia readmitido após um procedimento colorretal.PURPOSE: the aim of this study was to identify the risk factors for readmission among patients submitted to colorectal surgery. METHODS: a single-center colorectal quality-assessment database was queried for patients undergoing colorectal procedures with ileostomy during 2009. The sample was divided into readmitted vs. non-readmitted. Readmission was defined as admission within the first 30 days after the index procedure. Groups were compared by pre, intra and postoperative characteristics. A multivariate analysis was performed to identify the risk factors for readmission. RESULTS: the query returned 496 patients, [267 (54%) males, median age 48 years (IQR: 34-60)]. Eighty-three (17%) were readmitted; 296 patients (60%), were operated due to inflammatory bowel disease, 89 (18%) for cancer, 16 (3%) for diverticular disease and 95 (19%) for other diagnosis. The three most common procedures were total proctocolectomy with ileal pouch-anal anastomosis (IPAA) in 103 patients (21%), total colectomy with end ileostomy in 117 (24%) and small bowel resections (including enterocutaneous fistula takedown and J-pouch excision) in 149 (30%). The following variables were significantly more common in readmitted patients: current smoking (24% vs. 14%, p = 0.02), postoperative DVT/PE (10% vs. 4%, p = 0.04), wound infection (20% vs. 10% p = 0.01), sepsis (22% vs. 8% p < 0.001) and organ or space surgical site infection (OrgSSI) (35% vs. 5%, p < 0.001). Postoperative OrgSSI was the only independent factor associated with readmission in a multivariate analysis (p < 0.001). CONCLUSION: colorectal surgeons should be alert for OrgSSI when facing an ileostomy patient readmitted after a colorectal procedure

Effects of High-Intensity Warm-Up on 5000-Meter Performance Time in Trained Long-Distance Runners

Warm-up protocols with high intensities before continuous running provide potential benefits for middle-distance runners. Nevertheless, the effect of high-intensity warm-ups on long-distance runners remains unclear. The purpose of this study was to verify the effect of a high-intensity warm-up protocol on 5000 m performance in trained runners. Thirteen male runners (34 ± 10 years, 62 ± 6 kg, 62.7 ± 5.5 ml/kg/min) performed two 5000 m time trials, preceded by two different warm-ups. One high-intensity warm up (HIWU: 1x 500 m (70% of the running intensity) + 3x 250 m (100% of the running intensity) and one low-intensity warm up (LIWU: 1x 500 m (70% of the running intensity) + 3x 250 m (70% of the running intensity)), where the running intensities were calculated using the results obtained in the Cooper test. Physiological and metabolic responses, and endurance running performance parameters, were evaluated by the Counter Movement Jump (CMJ), running rating of perceived exertion (RPE), blood lactate concentration (BLa), and performance running. Total time for the 5000 m was lower using HIWU when compared to LIWU (1141.4 ± 110.4 s vs. 1147.8 ± 111.0 s; p = 0.03; Hedges' g = 0.66). The HIWU warm-up led to an improvement in pacing strategy during the time trial. After warm-up protocols, the performance on the CMJ was improved only when applying HIWU (p = 0.008). Post warm-up BLa was significantly higher for HIWU vs. LIWU (3.5 ± 1.0 mmol·L-1 vs. 2.3 ± 1.0 mmol·L-1; p = 0.02), with similar behavior for the RPE (p = 0.002), internal load of the session (p = 0.03). The study showed that a high-intensity warm-up protocol can improve performance in the 5000 m in trained endurance runners

Spectrochemical analysis in blood plasma combined with subsequent chemometrics for fibromyalgia detection

Fibromyalgia is a rheumatologic condition characterized by multiple and chronic body pain, and other typical symptoms such as intense fatigue, anxiety and depression. It is a very complex disease where treatment is often made by non-medicated alternatives in order to alleviate symptoms and improve the patient’s quality of life. Herein, we propose a method to detect patients with fibromyalgia (n = 252, 126 controls and 126 patients with fibromyalgia) through the analysis of their blood plasma using attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy in conjunction with chemometric techniques, hence, providing a low-cost, fast and accurate diagnostic approach. Different chemometric algorithms were tested to classify the spectral data; genetic algorithm with linear discriminant analysis (GA-LDA) achieved the best diagnostic results with a sensitivity of 89.5% in an external test set. The GA-LDA model identified 24 spectral wavenumbers responsible for class separation; amongst these, the Amide II (1,545 cm−1) and proteins (1,425 cm−1) were identified to be discriminant features. These results reinforce the potential of ATR-FTIR spectroscopy with multivariate analysis as a new tool to screen and detect patients with fibromyalgia in a fast, low-cost, non-destructive and minimally invasive fashion

Fatores de risco para prolongamento do tempo de permanência após cirurgia colorretal

OBJETIVO: Os cirurgiões proctologistas muitas vezes enfrentam dificuldades para explicar aos administradores/contribuintes as razões para o prolongamento do tempo de internação hospitalar (TIH). O objetivo deste estudo foi identificar os fatores associados ao aumento do TIH após cirurgia colorretal. MÉTODO: A população do estudo incluiu pacientes que constam do banco de dados do American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) no ano de 2007 e que foram submetidos à ressecção ileocólica, colectomia segmentar ou ressecção anterior. A população do estudo foi dividida em normal (abaixo do percentil 75) e TIH prolongado (acima do percentil 75). A análise multivariada foi realizada usando o TIH prolongado como variável dependente e as variáveis do ACS-NSQIP como preditivas. Um valor de p < 0,01 foi considerado significativo. RESULTADOS: No total, 12.269 pacientes com um TIH mediano de 6 dias (intervalo interquartil, 4-9) foram incluídos. Havia 2.617 pacientes (21,3%) com TIH prolongado (mediana, 15 dias; intervalo interquartil, 13-22). A idade média dos pacientes era de 69 anos (intervalo interquartil, 57-79) e 1.308 (50%) eram do sexo feminino. Os fatores de risco para TIH prolongado foram sexo masculino, insuficiência cardíaca congestiva, perda de peso, doença de Crohn, albumina < 3,5 g/dL e hematócrito < 47% no pré-operatório, sepse basal, classe ASA ≥ 3, cirurgia aberta, tempo cirúrgico ≥ 190 minutos, pneumonia no pós-operatório, falha no desmame da ventilação mecânica, trombose venosa profunda, infecção do trato urinário, sepse sistêmica, infecção do sítio cirúrgico e reoperação dentro de 30 dias da cirurgia primária. CONCLUSÃO: Vários fatores estão associados ao aumento do TIH após a cirurgia colorretal. Nossos resultados são úteis para que os cirurgiões possam explicar os TIH prolongados aos administradores/contribuintes que são críticos dessa métrica.OBJECTIVE: Colorectal surgeons often struggle to explain to administrators/payers reasons for prolonged length of stay (LOS). This study aim was to identify factors associated with increased LOS after colorectal surgery. DESIGN: The study population included patients from the 2007 American-College-of-Surgeons-National-Surgical-Quality-Improvement-Program (ACS-NSQIP) database undergoing ileocolic resection, segmental colectomy, or anterior resection. The study population was divided into normal (below 75th percentile) and prolonged LOS (above the 75th percentile). A multivariate analysis was performed using prolonged LOS as dependent variable and ACS-NSQIP variables as predictive variables. P-value < 0.01 was considered significant. RESULTS: 12,269 patients with a median LOS of 6 (inter-quartile range 4-9) days were included. There were 2,617 (21.3%) patients with prolonged LOS (median 15 days, inter-quartile range 13-22). 1,308 (50%) were female, and the median age was 69 (inter-quartile range 57-79) years. Risk factors for prolonged LOS were male gender, congestive heart failure, weight loss, Crohn's disease, preoperative albumin < 3.5 g/dL and hematocrit < 47%, baseline sepsis, ASA class ≥ 3, open surgery, surgical time ≥ 190 min, postoperative pneumonia, failure to wean from mechanical ventilation, deep venous thrombosis, urinary-tract infection, systemic sepsis, surgical site infection and reoperation within 30-days from the primary surgery. CONCLUSION: Multiple factors are associated with increased LOS after colorectal surgery. Our results are useful for surgeons to explain prolonged LOS to administrators/payers who are critical of this metric