Validity and reproducibility of a method to estimate cardiorespiratory fitness in college adults / Validez y reproducibilidad de un método para estimar la capacidad cardiorrespiratoria en adultos universitarios

Introduction: Cardiorespiratory fitness is a predictor of cardiovascular and all-cause mortality. Its assessment in different groups has clinical and public health usefulness. Objective: To evaluate the validity and reproducibility of a no-exercise method [National Aeronautics and Space Administration (NASA) method] to estimate the maximum oxygen consumption (VO2máx) in college adults. Materials and methods: This study included 94 healthy individuals of both sexes (18-55 years). The gold standard was ergospirometry. The validity and reproducibility were evaluated with the intraclass correlation coefficient (ICC) and the Bland-Altman method. Results: Among the participants, we found a mean age of 30.54 ± 9.33 years and a VO2máx of 41.29 ± 9.54 ml O2.kg-1.min-1; 48.9 % were women. A mean difference of VO2máx between ergospirometry and that estimated by the NASA method of 3.41 ± 5.64 ml O2.kg-1.min-1 was found. The concordance between the two methods was good, with an ICC of 0.858 (CI95% 0.672-0.926). The percentage of error was 29.70 %. The reproducibility of the two estimates by the NASA method was excellent, with an ICC of 0.986 (CI95% 0.927-0.995). Conclusions: The NASA method is valid and reproducible to estimate VO2máx in college adults. In addition, it is safe and easy to apply. Estimating cardiorespiratory fitness is recommended to improve screening in cardiometabolic risk programs and to implement timely interventions.

Introducción. La capacidad física cardiorrespiratoria es un predictor de mortalidad por enfermedad cardiovascular y por todas las causas. Su diagnóstico en diferentes grupos tiene utilidad clínica y en salud pública. Objetivo. Evaluar la validez y reproducibilidad de un método sin ejercicio implementado por la NASA (National Aeronautics and Space Administration), para estimar el volumen máximo de oxígeno (VO2máx) consumido en adultos universitarios. Materiales y métodos. Estudio de validación de una prueba que incluyó 94 individuos sanos de ambos sexos (18 a 55 años). La prueba de referencia fue la ergoespirometría. La validez y la reproducibilidad se evaluaron mediante el coeficiente de correlación intraclase (Intraclass Correlation Coefficient, CCI) y el método de Bland-Altman. Resultados. Del total de los individuos incluidos en el estudio, 48,9 % fueron mujeres. La media de edad de los participantes fue de 30,54 ± 9,33 años y, la del VO2máx, fue de 41,29 ± 9,54 mlO2.kg-1.min-1. Se encontró una diferencia de medias de VO2máx entre la ergoespirometría y el estimado por el método implementado por la NASA de 3,41 ± 5,64 mlO2.kg-1.min-1. La concordancia entre los dos métodos fue buena, con un coeficiente de correlación intraclase de 0,858 (IC95% 0,672-0,926). El porcentaje de error fue del 29,70 %. La reproducibilidad de las dos estimaciones por el método implementado por la NASA fue excelente, con un coeficiente de correlación intraclase de 0,986 (IC95% 0,927-0,995). Conclusiones. El método NASA es válido y reproducible para estimar el VO2máx en adultos universitarios; además, es seguro y de fácil aplicación. Se recomienda la estimación de la capacidad física cardiorrespiratoria para mejorar la tamización en los programas de riesgo cardiometabólico e implementar intervenciones oportunas.

Validez y reproducibilidad de un método para estimar la capacidad cardiorrespiratoria en adultos universitarios / Validity and reproducibility of a method to estimate cardiorespiratory fitness in college adults

Introducción. La capacidad física cardiorrespiratoria es un predictor de mortalidad por enfermedad cardiovascular y por todas las causas. Su diagnóstico en diferentes grupos tiene utilidad clínica y en salud pública. Objetivo. Evaluar la validez y reproducibilidad de un método sin ejercicio implementado por la NASA (National Aeronautics and Space Administration), para estimar el volumen máximo de oxígeno (VO2máx) consumido en adultos universitarios. Materiales y métodos. Estudio de validación de una prueba que incluyó 94 individuos sanos de ambos sexos (18 a 55 años). La prueba de referencia fue la ergoespirometría. La validez y la reproducibilidad se evaluaron mediante el coeficiente de correlación intraclase (Intraclass Correlation Coefficient, CCI) y el método de Bland-Altman. Resultados. Del total de los individuos incluidos en el estudio, 48,9 % fueron mujeres. La media de edad de los participantes fue de 30,54 ± 9,33 años y, la del VO2máx, fue de 41,29 ± 9,54 mlO2.kg-1.min-1. Se encontró una diferencia de medias de VO2máx entre la ergoespirometría y el estimado por el método implementado por la NASA de 3,41 ± 5,64 mlO2.kg-1.min-1. La concordancia entre los dos métodos fue buena, con un coeficiente de correlación intraclase de 0,858 (IC95% 0,672-0,926). El porcentaje de error fue del 29,70 %. La reproducibilidad de las dos estimaciones por el método implementado por la NASA fue excelente, con un coeficiente de correlación intraclase de 0,986 (IC95% 0,927-0,995). Conclusiones. El método NASA es válido y reproducible para estimar el VO2máx en adultos universitarios; además, es seguro y de fácil aplicación. Se recomienda la estimación de la capacidad física cardiorrespiratoria para mejorar la tamización en los programas de riesgo cardiometabólico e implementar intervenciones oportunas.

Introduction: Cardiorespiratory fitness is a predictor of cardiovascular and all-cause mortality. Its assessment in different groups has clinical and public health usefulness. Objective: To evaluate the validity and reproducibility of a no-exercise method [National Aeronautics and Space Administration (NASA) method] to estimate the maximum oxygen consumption (VO2máx) in college adults. Materials and methods: This study included 94 healthy individuals of both sexes (1855 years). The gold standard was ergospirometry. The validity and reproducibility were evaluated with the intraclass correlation coefficient (ICC) and the Bland-Altman method. Results: Among the participants, we found a mean age of 30.54 ± 9.33 years and a VO2máx of 41.29 ± 9.54 ml O2kg-1-min-1; 48.9 % were women. A mean difference of VO2máx between ergospirometry and that estimated by the NASA method of 3.41 ± 5.64 ml O2.kg-1. min-1 was found. The concordance between the two methods was good, with an ICC of 0.858 (CI95% 0.672-0.926). The percentage of error was 29.70 %. The reproducibility of the two estimates by the NASA method was excellent, with an ICC of 0.986 (CI95% 0.927-0.995). Conclusions: The NASA method is valid and reproducible to estimate VO2máx in college adults. In addition, it is safe and easy to apply. Estimating cardiorespiratory fitness is recommended to improve screening in cardiometabolic risk programs and to implement timely interventions.

Efficacy of high-intensity interval- or continuous aerobic-training on insulin resistance and muscle function in adults with metabolic syndrome: a clinical trial.

PURPOSE: We carried out a randomized, clinical trial in adults of both sexes with metabolic syndrome (MS) to assess the efficacy of high-intensity, low-volume interval training (HIIT) compared to moderate-intensity continuous training (MICT) on insulin resistance (IR), muscle mass, muscle activation, and serum musclin. METHODS: Fasting glycemia, insulinemia, and glycated haemoglobin were determined by conventional methods, IR by Homeostatic model assessment (HOMA), lean mass by Dual-Energy X-ray Absorptiometry, muscle activation through carnosine by Proton Magnetic Resonance Spectroscopy, and musclin by Enzyme-Linked ImmunoSorbent Assay before and after a supervised, three-times/week, 12-week treadmill programme. HIIT (n = 29) consisted of six intervals with one-minute, high-intensity phases at 90% of peak oxygen consumption (VO2peak). MICT (n = 31) trained at 60% of VO2peak for 30 min. RESULTS: Patients had a mean age of 50.8 ± 6.0 years, body mass index of 30.6 ± 4.0 kg/m2, and VO2peak of 29.0 ± 6.3 mL.kg-1.min-1. Compared to MICT, HIIT was not superior at reducing Ln HOMA-IR (adjusted mean difference: 0.083 [95%CI - 0.092 to 0.257]), carnosine or musclin or at increasing thigh lean mass. HIIT increased carnosine by 0.66 mmol/kg.ww (95% CI 0.08-1.24) after intervention. Both interventions reduced IR, body fat percentage and increased total lean mass/height2 and VO2peak. Musclin showed a non-significant reduction with a small effect size after both interventions. CONCLUSION: Compared to MICT, HIIT is not superior at reducing IR, carnosine or musclin or at increasing skeletal muscle mass in adults with MS. Both training types improved IR, muscle mass and body composition. NCT03087721, March 22nd, 2017. TRIAL REGISTRATION NUMBER: NCT03087721. Registered March 22nd, 2017.

Musclin Is Related to Insulin Resistance and Body Composition, but Not to Body Mass Index or Cardiorespiratory Capacity in Adults.

BACKGROUND: We studied whether musclin function in humans is related to glycemic control, body composition, and cardiorespiratory capacity. METHODS: A cross-sectional study was performed in sedentary adults with or without metabolic syndrome (MS). Serum musclin was measured by enzyme-linked immunosorbent assay. Insulin resistance (IR) was evaluated by the homeostatic model assessment (HOMA-IR). Body composition was determined by dual-energy X-ray absorptiometry and muscle composition by measuring carnosine in the thigh, a surrogate of fiber types, through proton magnetic resonance spectroscopy. Cardiorespiratory capacity was assessed through direct ergospirometry. RESULTS: The control (n=29) and MS (n=61) groups were comparable in age (51.5±6.5 years old vs. 50.7±6.1 years old), sex (72.4% vs. 70.5% women), total lean mass (58.5%±7.4% vs. 57.3%±6.8%), and peak oxygen consumption (VO2peak) (31.0±5.8 mL O2./kg.min vs. 29.2±6.3 mL O2/kg.min). Individuals with MS had higher body mass index (BMI) (30.6±4.0 kg/m2 vs. 27.4± 3.6 kg/m2), HOMA-IR (3.5 [95% confidence interval, CI, 2.9 to 4.6] vs. 1.7 [95% CI, 1.1 to 2.0]), and musclin (206.7 pg/mL [95% CI, 122.7 to 387.8] vs. 111.1 pg/mL [95% CI, 63.2 to 218.5]) values than controls (P˂0.05). Musclin showed a significant relationship with HOMA-IR (ß=0.23; 95% CI, 0.12 to 0.33; P˂0.01), but not with VO2peak, in multiple linear regression models adjusted for age, sex, fat mass, lean mass, and physical activity. Musclin was significantly associated with insulin, glycemia, visceral fat, and regional muscle mass, but not with BMI, VCO2peak, maximum heart rate, maximum time of work, or carnosine. CONCLUSION: In humans, musclin positively correlates with insulinemia, IR, and a body composition profile with high visceral adiposity and lean mass, but low body fat percentage. Musclin is not related to BMI or cardiorespiratory capacity.

Formalizing land rights can reduce forest loss: Experimental evidence from Benin.

Many countries are formalizing customary land rights systems with the aim of improving agricultural productivity and facilitating community forest management. This paper evaluates the impact on tree cover loss of the first randomized control trial of such a program. Around 70,000 landholdings were demarcated and registered in randomly chosen villages in Benin, a country with a high rate of deforestation driven by demand for agricultural land. We estimate that the program reduced the area of forest loss in treated villages, with no evidence of anticipatory deforestation or negative spillovers to other areas. Surveys indicate that possible mechanisms include an increase in tenure security and an improvement in the effectiveness of community forest management. Overall, our results suggest that formalizing customary land rights in rural areas can be an effective way to reduce forest loss while improving agricultural investments.

Efficacy of high-intensity, low-volume interval training compared to continuous aerobic training on insulin resistance, skeletal muscle structure and function in adults with metabolic syndrome: study protocol for a randomized controlled clinical trial (Intraining-MET).

BACKGROUND: Evidence of the efficacy of high-intensity, low-volume interval training (HIIT-low volume) in treating insulin resistance (IR) in patients with metabolic disorders is contradictory. In addition, it is unknown whether this effect is mediated through muscle endocrine function, which in turn depends on muscle mass and fiber type composition. Our aims were to assess the efficacy of HIIT-low volume compared to continuous aerobic exercise (CAE) in treating IR in adults with metabolic syndrome (MS) and to establish whether musclin, apelin, muscle mass and muscle composition are mediators of the effect. METHODS: This is a controlled, randomized, clinical trial using the minimization method, with blinding of those who will evaluate the outcomes and two parallel groups for the purpose of showing superiority. Sixty patients with MS and IR with ages between 40 and 60 years will be included. A clinical evaluation will be carried out, along with laboratory tests to evaluate IR (homeostatic model assessment (HOMA)), muscle endocrine function (serum levels of musclin and apelin), thigh muscle mass (by dual energy x-ray absorptiometry (DXA) and thigh muscle composition (by carnosine measurement with proton magnetic resonance spectroscopy (1H-MRS)), before and after 12 weeks of a treadmill exercise program three times a week. Participants assigned to the intervention (n = 30) will receive HIIT-low volume in 22-min sessions that will include six intervals at a load of 90% of maximum oxygen consumption (VO2 max) for 1 min followed by 2 min at 50% of VO2 max. The control group (n = 30) will receive CAE at an intensity of 60% of VO2 max for 36 min. A theoretical model based on structural equations will be proposed to estimate the total, direct and indirect effects of training on IR and the proportion explained by the mediators. DISCUSSION: Compared with CAE, HIIT-low volume can be effective and efficient at improving physical capacity and decreasing cardiovascular risk factors, such as IR, in patients with metabolic disorders. Studies that evaluate mediating variables of the effect of HIIT-low volume on IR, such as endocrine function and skeletal muscle structure, are necessary to understand the role of skeletal muscle in the pathophysiology of MS and their regulation by exercise. TRIAL REGISTRATION: NCT03087721 . High-intensity Interval, Low Volume Training in Metabolic Syndrome (Intraining-MET). Registered on 22 March 2017, retrospectively registered.

[Urachal adenocarcinoma of the bladder, our experience in 20 years]. / Adenocarcinoma de uraco, nuestra experiencia en 20 años.

OBJECTIVE: To report two cases of urachal adenocarcinoma and to review the published literature. METHODS / RESULTS: We present a review of our urachal carcinoma cases from a third level hospital between 1990-2011 in an area of 520.000 inhabitants. Both cases were middle aged men, consulting for repeated urine infections, and abdominal mass with hematuria and mucous discharge through the urethra. They were treated initially with partial cystectomy and adjuvant treatment with chemotherapy in one case, and chemo and radiotherapy in the other. The first case died in 3 years and the other is still alive after 4 years of follow up. CONCLUSIONS: Urachal adenocarcinomas of the bladder are rare tumors the natural history of which has not changed during the last years. Open partial cystectomy with en bloc resection of the bladder dome, urachus and the umbilicus is the standard treatment in localized stages, although minimal invasive techniques appear to have the same oncological outcomes. Pelvic lymphadenectomy is advised. Most of the patients are diagnosed at an advanced local or metastatic stage. There is a need to improve diagnostic techniques for early treatment and to find new chemotherapy protocols that can help to improve these patients' survival.

Adenocarcinoma de uraco, nuestra experiencia en 20 años / Urachal adenocarcinoma of the bladder, our experience in 20 years

OBJETIVO: Presentar dos casos de adenocarcinoma de uraco y realizar una revisión de la literatura publicada. Método/RESULTADO: Se presenta una revisión de nuestros casos de adenocarcinoma de uraco de nuestro hospital terciario entre 1990 y 2011 en un área de 520.000 habitantes. Ambos casos eran hombres de mediana edad, que consultaron por infecciones urinarias repetidas, hematuria, masa abdominal y secreción mucosa por la uretra. Inicialmente se les realizó una cistectomía parcial con quimioterapia adyuvante en un caso, y quimio y radioterapia en el otro. Uno de los pacientes precisó una cistectomía radical de rescate. El primer paciente falleció por progresión a los 3 años y el segundo continúa vivo tras 4 años de seguimiento. CONCLUSIONES: Los adenocarcinomas de uraco de la vejiga son tumores raros cuya historia natural no ha cambiado en los últimos a pesar de nuevos protocolos de quimioterapia. La cistectomía parcial abierta con resección en bloque de la cúpula de la vejiga, el uraco y el ombligo es el tratamiento estándar en estadios localizados. La mayoría de los pacientes son diagnosticados en una etapa local avanzada o metastásica. Se necesitan nuevos protocolos quimioterápicos que permitan aumentar la SPV en estadíos avanzados

OBJECTIVE: To report two cases of urachal adenocarcinoma and to review the published literature. Methods/ RESULTS: We present a review of our urachal carcinoma cases from a third level hospital between 1990- 2011 in an area of 520.000 inhabitants. Both cases were middle aged men, consulting for repeated urine infections, and abdominal mass with hematuria and mucous discharge through the urethra. They were treated initially with partial cystectomy and adjuvant treatment with chemotherapy in one case, and chemo and radiotherapy in the other. The first case died in 3 years and the other is still alive after 4 years of follow up. CONCLUSIONS: Urachal adenocarcinomas of the bladder are rare tumors the natural history of which has not changed during the last years. Open partial cystectomy with en bloc resection of the bladder dome, urachus and the umbilicus is the standard treatment in localized stages, although minimal invasive techniques appear to have the same oncological outcomes. Pelvic lymphadenectomy is advised. Most of the patients are diagnosed at an advanced local or metastatic stage. There is a need to improve diagnostic techniques for early treatment and to find new chemotherapy protocols that can help to improve these patients' survival

Effects of energy drink major bioactive compounds on the performance of young adults in fitness and cognitive tests: a randomized controlled trial.

BACKGROUND: The consumption of beverages containing caffeine and taurine before exercising has been associated with increased physical and psychological performances and has been promoted to support the emotional state and provide vitality to consumers. However, there are contradictory results on these issues, it is not clear the effect of every major compound in relation to the whole effect of the beverages and there is a lack in knowledge about their degree of safety for consumption. METHODS: This study used a double-blind, placebo controlled, randomized, crossover design. Fourteen male volunteer soldiers from the Colombian army performed different tests to measure their cardiorespiratory fitness (VO2max and maximum heart rate), time to exhaustion, strength (isometric strength), power (vertical jump), concentration (Grid test) and memory (Digits test) after drinking 250 ml of one of the following beverages: one with 80 mg caffeine, one with 1000 mg taurine, one with 80 mg caffeine plus 1000 mg taurine, a commercial energy drink (Red Bull®) or a placebo drink. Subjects were caffeine-consumers that avoided caffeine during the day of evaluation. All beverages were matched in flavor and other organoleptic properties to the commercial one, were bottled in dark plastic bottles and were administered in identical conditions to the participants. Differences between treatments were assessed using repeated measures and analysis of variance. RESULTS: The mean ± SD values of VO2max, maximum heart rate, time to exhaustion, right handgrip strength, left handgrip strength, vertical jump, Grid test and Digits test were 61.3 ± 6.2 ml/kg.min, 196 ± 6.8 beats per min, 17 ± 1.2 min, 56.8 ± 6.6 kgf, 53.1 ± 5.9 kgf, 41.1 ± 3.8 cm, 19.9 ± 5.9 observed digits and 10.9 ± 3.1 remembered digits after drinking a placebo drink. Comparisons among the commercial drink, caffeine, taurine, caffeine plus taurine and placebo treatments did not show statistically differences in the results of the performed tests. No adverse effects were reported by the participants. CONCLUSION: The consumption of caffeine (80 mg) and taurine (1000 mg) or their combination does not increase the physical and cognitive ability in young adults during exercise.

Infliximab-induced lichen planopilaris.

OBJECTIVE: To report a case of lichen planopilaris in a patient treated with infliximab for longstanding refractory psoriasis. CASE SUMMARY: A 37-year-old man with recalcitrant plaque psoriasis was being treated with infliximab at a dosage of 5 mg/kg every 8 weeks, with good response. However, 11 months later the patient developed follicular keratotic papulo-pustules, perifollicular erythema, and scaling, with progressive hair loss of the frontal and parietal regions of the scalp and eyebrows. A skin biopsy from a representative lesion was consistent with the diagnosis of lichen planopilaris. DISCUSSION: Anti-tumor necrosis factor (TNF) agents have been associated with numerous cutaneous adverse events. Lichenoid reactions are uncommon but are an emerging cutaneous adverse effect. At least 13 cases of these eruptions have been recently described. Although lichenoid reactions in patients treated with TNF-alpha inhibitors may be clinically very diverse, we have found no previously reported cases of lichen planopilaris induced by these agents. An objective causality assessment revealed that the adverse event was probable. CONCLUSIONS: Since anti-TNF agents are being used for a rapidly expanding number of rheumatic, digestive, and dermatologic diseases, it is expected that lichenoid eruptions and other skin toxicities are likely to be seen with increasing frequency in clinical practice.

Insuficiencia mitral aguda severa resuelta mediante angioplastia / No disponible

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Tamizaje de eventos adversos en atención obstétrica y del puerperio en el Instituto Materno Infantil de Bogotá, Colombia. 2002-2003 / Screening of adverse events (AE) in obstetric attention and puerperium at the Instituto Materno Infantil, Bogotá, Colombia, 2002-2003

Introducción: en Colombia la mayoría de los partos son institucionales; sin embargo, la morbimortalidad materna y perinatal es alta. Los resultados de la atención materna están determinados en parte por la adecuada atención de las complicaciones. Dado que la morbimortalidad materna es evitable en una importante proporción de casos, es relevante determinar el impacto que tienen los eventos adversos (EA) intra-hospitalarios sobre ella. No tener datos sobre éstos, limita su análisis. El propósito del presente trabajo es describir los resultados del tamizaje de los eventos adversos en la atención materna y en una institución de tercer nivel y centro de referencia de la atención materno perinatal en Bogotá. Materiales y métodos: estudio prospectivo de vigilancia epidemiológica, en pacientes gestantes que ingresaron al Instituto Materno Infantil (IMI) durante el período comprendido entre noviembre de 2002 y octubre de 2003. Se incluyeron pacientes con alteraciones del embarazo o en trabajo de parto. Se excluyeron quienes tuvieron parto en otra institución. Se describen las frecuencias de los eventos adversos y los factores asociados. Se realizó un análisis univariado para establecer la asociación con variables de tipo clínico u hospitalario por medio de la prueba t de student o la prueba Ji2, con un nivel de confianza del 95 por ciento. Resultados: se incluyeron 2.530 mujeres. La incidencia de eventos adversos durante la hospitalización fue de 12,02 por ciento. Tuvieron mayor riesgo de presentar eventos adversos las pacientes con menor edad gestacional, morbilidad materna de base a su ingreso (RR 1,63 IC95 por ciento 1,06 - 2,53) y disfunción orgánica al ingreso (RR 3,2 IC95 por ciento 2,53 - 4,07). Las pacientes sometidas a cesárea tuvieron un RR de 1,81 (IC95 por ciento 1,4 - 2,41) de presentar eventos adversos, en comparación con las de parto vaginal. En el grupo de pacientes con eventos adversos la estancia fue significativamente mayor (mediana 4 días, 0 - 30 versus mediana 2 días 0-30). Conclusiones: los eventos adversos se encuentran asociados a la morbilidad materna y están relacionados con los factores maternos y hospitalarios.

Perfil funcional de mujeres deportistas de alto rendimiento

Objetivos: establecer el perfil característico del VO2max, de la PWCmax, de la PWC170 y de la IEA para algunas poblaciones deportivas, de sexo femenino y alto rendimiento, del departamento de Antioquia, Colombia. Método: el estudio se realizó en 221 mujeres cpompetidoras de atletismo de fondo, judo, baloncesto, triatlón, natación, nado sincronizado y patinaje de carrera. La valoración funcional se efectuó con un sistema espirométrico de circuito abierto y de acuerdo con las características y con el gasto motor del deporte evaluado, con un cicloergómetro de frenado electromagnético o con una banda rodante motorizada. Resultados: se presentan los datos del consumo máximo de oxígeno (VO2max), capacidad física máxima de trabajo PWCmax), capacidad física submáxima de trabajo a 170 pulsaciones por minuto (PWC170), Indice de eficiencia aeróbica (IEA), obtenido de la relación PWC170/WCmax. De acuerdo con los resultados del presente estudio, en mujeres, al contrario de lo encontrado en hombres, las determinaciones del VO2max, de la PWCmax y de la PWC170, efectuadas tanto en banda rodante como en cicloergómetro son excelentes indicadores de la capacidad aeróbica. Conclusiones: la presente investigación establece, para la población estudiada, los perfiles ergoespirométricos de algunas variables fisiológicas, con miras a que sirvan como valores de referencia para la selección y la preparación de los diferentes grupos deportivos de alta competencia. Se describe por primera vez las características funcionales, en mujeres, del patinaje de carreras

Características funcionales de deportistas antioqueños de alto rendimiento

Se presentan los datos del consumo máximo de oxígeno (VO2max), de la capacidad física máxima de trabajo (PWCmax) y de la capacidad física máxima de trabajo a 170 pulsaciones por minuto (PWC170), de un grupo de deportistas de alto rendimiento, oriundos del departamento de Antioquia (Colombia). El estudio se realizó en 857 hombres competidores de atletismo de fondo, lucha olímpica, baloncesto, fútbol, microfútbol, ciclismo de pista, natación, patinaje y polo acuático. La valaración funcional se efectuó con un sistema espirométrico de circuito abierto y con un cicloergómetro de frenado electromagnético o una banda rodante motorizada, de acuerdo con las características y el gesto motor del deporte evaluado. De acuerdo con los resultados del presente estudio, en los deportes pedestres evaluados con una banda rodante, las determinaciones del VO2max, de la PWCmax y de la PWC170, son excelentes indicadores de la capacidad aeróbica, pero no lo son cuando para su determinación se emplea el cicloergómetro; quizás esto se deba a que la ejecución del trabajo en el cicloergómetro compromete masas musculares y gestos motores diferentes a los empleados comúnmente. Se propone la relación PWC170/PWCmax como un indicador de la eficiencia en la utilización de la capacidad aeróbica, útil para el diseño y control de los planes de entrenamiento en aquellos deportes en los cuales los procesos aeróbicos son determinantes para un adecuado desempeño.