A comparison of elastic tubing and isotonic resistance exercises.

The aim of this study was to assess effects of a short-term resistance program on strength in fit young women using weight machines/free weights or elastic tubing. 42 physically fit women (21.79±0.7 years) were randomly assigned to the following groups: (i) the Thera-Band (®) Exercise Station Group (TBG); (ii) the weight machines/free weights group (MFWG); or (iii) the control group (CG). Each experimental group performed the same periodised training program that lasted for 8 weeks, with 2-4 sessions per week and 3-4 sets of 8-15 submaximal reps. A load cell (Isocontrol; ATEmicro, Madrid, Spain) was used to test the evolution of the Maximum Isometric Voluntary Contraction (MIVC) in 3 different exercises: Vertical Rowing (VR), Squat (S) and Back Extension (BE). A mixed model MANOVA [group (CG, TBG, MFWG) x testing time (pre-test, post-test)] was applied to determine the effect of the different resistance training devices on strength. The only groups to improve their MIVC (p<0.005) were TBG and MFWG, respectively: VR 19.87% and 19.76%; S 14.07 and 28.88; BE 14.41% and 14.00%. These results indicate that resistance training using elastic tubing or weight machines/free weights have equivalent improvements in isometric force in short-term programs applied in fit young women.

Effect of fatigue on the intra-cycle acceleration in front crawl swimming: a time-frequency analysis.

The present study analyzes the changes in acceleration produced by swimmers before and after fatiguing effort. The subjects (n = 15) performed a 25-m crawl series at maximum speed without fatigue, and a second series with fatigue. The data were registered with a synchronized system that consisted of a position transducer (1 kHz) and a video photogrametry (50 Hz). The acceleration (ms(-2)) was obtained by the derivative analysis of the variation of the position with time. The amplitude in the time domain was calculated with the root mean square (RMS); while the peak power (PP), the peak power frequency (PPF) and the spectrum area (SA) were calculated in the frequency domain with Fourier analysis. On the one hand, the results of the temporal domain show that the RMS change percentage between series was 67.5% (p < 0.001). On the other hand, PP, PPF, and SA show significant changes (p < 0.001). PP and SA were reduced by 63.1% and 59.5%, respectively. Our results show that the acceleration analysis of the swimmer with Fourier analysis permits a more precise understanding of which propulsive forces contribute to the swimmer performance before and after fatigue appears.

Change over time of bowel habit in irritable bowel syndrome: a prospective, observational, 1-year follow-up study (RITMO study).

BACKGROUND: Evolution of bowel habit in irritable bowel syndrome (IBS) is not well known. AIM: To evaluate the change over time of bowel habit in IBS patients followed-up during 1 year. METHODS: Five hundred and seventeen patients with IBS were prospectively included in an observational study with five evaluations over a 1-year period. Symptoms were recorded daily in diary cards during four 4-week periods along the study. Bristol Stool Scale (BSS) was used to define bowel habit. RESULTS: Four-hundred patients completed the study. Rome II showed low-moderate agreement (42%) with BSS to define bowel habit. Frequency of constipation and diarrhoea showed little changes throughout the study. Over 50% of the patients had the same bowel habit when each diary was compared with the next one. A third of patients maintained the same habit throughout the study. Most changes occurred from/to mixed or unsubtyped IBS. Only 14% of cases changed from constipation to diarrhoea or vice versa. This change was associated to female gender (OR: 2.65). CONCLUSIONS: The frequency of constipation and diarrhoea remains relatively stable over time. Changes in IBS subtypes are common, but changes between constipation and diarrhoea are rare. Alternating IBS is more frequent in women.

Predictive factors of irritable bowel syndrome improvement: 1-year prospective evaluation in 400 patients.

BACKGROUND: The natural history of the irritable bowel syndrome is poorly understood. AIM: To assess the clinical course of the irritable bowel syndrome and the factors that might predict it. METHODS: An observational prospective study, involving 400 irritable bowel syndrome patients meeting Rome II criteria. Symptoms were recorded in a diary over four non-consecutive months (1, 4, 7 and 10). Demographic data, associated disorders, psychological status and health-related quality of life were obtained. RESULTS: At 1-year follow-up, half of the patients and half of their physicians considered irritable bowel syndrome to have improved, but improvement was minor. Diary data showed that, according to the type of symptom, improvement was small and quite different: diarrhoea in 19% of patients, abdominal pain frequency in 26%, constipation in 33% and abdominal pain intensity in 60%. Factors related to improvement at one year were: severe symptoms and poor health-related quality of life at first visit, irritable bowel syndrome-constipation, good improvement at 3 months, anxiety/depression, stress, symptoms related to meals and absence of comorbidity. By multivariate logistic regression, predictors were: severe basal symptoms and good improvement at 3 months (OR:CI 95%, 1.32:1.09-1.59 and 4.44:2.81-7.05). CONCLUSIONS: At 1-year follow-up, half the patients and their physicians considered the irritable bowel syndrome to have had some improvement but, symptom diaries demonstrated that improvement was small and heterogeneous. Severe basal symptoms and improvement at 3 months were related to better prognosis.

[The attitude of primary health care physicians in the metropolitan area of Barcelona about the diagnosis and treatment of Helicobacter pylori infection in gastroduodenal diseases]. / Actitud de los médicos de atención primaria del área metropolitana de Barcelona frente al diagnóstico y tratamiento de la infección por Helicobacter pylori en enfermedades gastroduodenales.

AIM: To evaluate the attitude of primary health care physicians versus the diagnosis and treatment of infection by Helicobacter pylori in patients with dyspepsia and gastroduodenal ulcer. DESIGN: An observational, transversal study was performed by a self administered questionnaire from June to October, 1997. PARTICIPANTS: Primary health care physicians from 38 reformed Medical Centers in the metropolitan area of Barcelona were included in the study. RESULTS: Of the 359 doctors to whom the questionnaire was sent, 283 responded (78.8%). In a patient with dyspepsia 95.4% would first request endoscopy. If they knew of the presence of infection by Helicobacter pylori 96.1% would administer eradication treatment in patients with gastric and duodenal ulcer and 15% would also do so if the endoscopy were normal. If the presence of infection by Helicobacter pylori were unknown in a patient with gastroduodenal ulcer, 65.3% would treat with anti-H2 or proton pump inhibitors associated with a diagnostic test of infection by Helicobacter pylori. If the physician decided to carry out eradication treatment of Helicobacter pylori infection, 98.6% would use one of the regimes recommended by different scientific societies. If confirmation of eradication of Helicobacter pylori infection were requested, 89% would do so one and three months after completion of treatment. In patients with gastric ulcer, 69.3% would request endoscopy on completion of treatment. The percentage of physicians specialized in Family and Community Medicine who would carry out eradication treatment in patients with duodenal ulcer and Helicobacter pylori infection and who would request endoscopies in patients with dyspepsia was found to be statistically significant in comparison with physicians without this specialty. CONCLUSIONS: The attitude of primary care physicians in the metropolitan area of Barcelona with regard to the diagnosis and treatment of infection by Helicobacter pylori in gastroduodenal diseases largely reflects the recommendations recently made by several scientific societies. In general there are no significant differences with respect to this attitude in regard to the age and sex of the physician, although their training was found to influence in some of the responses analyzed.

[MELAS: diagnostic keys and treatment in the Intensive Care Unit]. / MELAS: claves del diagnóstico y tratamiento en la Unidad de Cuidados Intensivos.

Cerebrovascular accident in young adults is not rare and the most common causes are: cardiac embolism, arterial dissection and migraine. The unknown etiology, in spite of extensive studies, is described in the literature in about one third of patients under 45 years of age. The mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS) may occur with symptoms that simulate a stroke. The <> episodes generally affect the posterior part of the brain and the basic insult mechanisms may be metabolic more than ischemic. We describe the case of an 18-year old patient who was admitted to the Intensive Care Unit due to a sudden picture of blindness. The ophthalmologic study was normal and the neuroimaging studies showed infarction in both occipital lobules. We explain the different clinical features, diagnostic, therapeutic and prognostic methods of the disease.

[The teaching health centers of Barcelona. The opinions of residents]. / Los centros de salud docentes de Barcelona. Opiniones de los residentes.

OBJECTIVE: To examine different aspects of the teaching health centres (THC) in the province of Barcelona as evaluated by the ex-residents (Exc-R) from general practice and community medicine (GP&CM). DESIGN: Descriptive study, gathering information by means of a self-administered postal questionnaire, with an addressed reply envelope. SETTING: Barcelona teaching unit (BTU). PARTICIPANTS: Eighty-one general practitioners whose qualifying years were 1987-89, 1988-90 and 1989-91, and who did their last residents year in the THC of the BTU. MEASUREMENTS AND MAIN RESULTS: There are significant differences (p < 0.05) between the various THC, in terms of: quality of teaching material and library; evaluation of the tutor in terms of attendance of classes and comment on medical histories; and average evaluation of tutor by the Ex-R. CONCLUSIONS: We propose that anonymous evaluations made by residents of their tutors should be generalised and used for, amongst other purposes, maintaining or revoking the accreditations of specific THC or tutors.

Role of transesophageal echocardiography in the assessment of patients with blunt chest trauma: correlation of echocardiographic findings with the electrocardiogram and creatine kinase monoclonal antibody measurements.

OBJECTIVES: This study was designed to evaluate the usefulness of transesophogeal echocardiography (TEE) for detecting cardiac damage after blunt chest trauma (BCT). BACKGROUND: Multiple methods have been used to detect cardiac damage after a BCT, but none has been demonstrated to be sensitive, specific, and feasible enough. METHODS: This multicenter prospective trial was designed to evaluate the usefulness of TEE in the assessment of patients with BCT and to compare the TEE findings with those provided by the electrocardiogram (ECG) and cardiac isoenzymes assay. One hundred seventeen consecutive patients with a significant BCT were enrolled. A TEE was performed in each patient. Serial ECGs and plasma profiles of creatine kinase (CK) and CK-monoclonal antibody (MB) were obtained. RESULTS: Sixty-six (56%) patients had pathologic findings in the TEE attributed to the BCT (group A). In the remaining 51 (44%) patients the TEE was normal (group B). An abnormal ECG was more frequent in group A (59% vs 24%; p < 0.001), and the serum CK-MB peak level was also higher in group A (174 +/- 30 U/L vs 93 +/- 21 U/L; p = 0.05). Relative to pathologic TEE findings, the sensitivity and specificity of an abnormal ECG were 59% and 73% and of high CK-MB with CK-MB/CK > 5% were 64% and 52%, respectively. CONCLUSIONS: We conclude that TEE can be routinely and safely performed for diagnosing cardiac injuries after a BCT and plays an important role in the evaluation and treatment of these patients. EGG and CK-MB assay are not good methods for detecting cardiac damage in this setting.