[Young football players aerobic perfomance in sub-maximum exercise with exhaustion at a moderate altitude without acclimation: experience in El Condor]. / Desempeño aeróbico de futbolistas jóvenes en ejercicio sub-máximo con agotamiento a moderada altitud sin aclimatación: experiencia en el Cóndor.

ANTECEDENTS: With the same intensity of sub-maximum effort, the concentration of serum (LS) or muscular lactate is higher in Hypoxia conditions, or exercise at an altitude without acclimation, in relation with normoxia or at sea level (MSL). The highest level of lactate after fatigue or in a test of strict anaerobic condition, would not be modified when altitude changes without previous acclimation. OBJECTIVE: To abtain local data about the magnitude of the affect in SL of a effective altitude at 1,700 meters without acclimation, as a parameter of aerobic performance of young soccer players of our environment who live and train at sea level. VOLUNTEERS AND METHODS: Self-controlled experimental test with a number of 10 volunteers (16 - 18 years-old), soccer players of lower leagues from an important local sport club. Two tests in a cycle ergometer of a graded physical effort until fatigue, the first one in the Center of High Performance at MSL (474 meters) and the second one in the town El Condor (EC; 2.220 meters), province of Cordoba. Exercise Protocol: warm-up 2', 30 Km/h with 50W; 3consecutive steps of 3' + 50W each one; final phase 30 Km/h of 200W until fatigue and/or symptoms or maximum time of 15'. SL and HR measurement: basal; the last 30" of every step and in fatigue. SL determination with Accusport. Two-tailed paired test. RESULTS: 1 volunteer dropped out befote completion in EC (n=9). Mean basal SL 2.1 mmol/L at MSL and EC (p=0.897). Mean difference (MD) EC vs. MSL +/- Standard error of 0.5 +/- 0.2 (p=0.033), 0.9 +/- 0.3 (p=0.008) and 0.6 +/- 0.3 mmol/L (p=0.103) in steps 1, 2, 3 respectively of sub-maximum effort. In fatigue (the highest level), Mean SL and Confidence Interval (CI) 95% of 7.6 (6.5-8.8) and 9.5 (7.8-11.2) mmol/L at MSL and EC respectively (p=0.030). Heart Rhythm (HR) without changes in EC in relation to MSL. 66% with a greater Borg scale and 33% of dizziness at EC. CONCLUSION: At an effective altitude at 1,700 meters without acclimation we can verify a lower aerobic performance with a subjective perception of a greater effort intensity, and neurological symptoms of hypoxia can be objectified in one-thirds of the cases.

Desempeño aeróbico de futbolistas jóvenes en ejercicio sub-máximo con agotamiento a moderada altitud sin aclimatación: experiencia en el Cóndor / Young football players aerobic perfomance in sub-maximum exercise with exhaustion at a moderate altitude without acclimation: experience in El Condor

A igual intensidad de esfuerzo sub-máximo, la concentración de lactato sérico (LS) y muscular es mayor en condición de hipoxia o ejercicio en altitud sin aclimatación, respecto normoxia o nivel del mar. El pico de lactato tras la fatiga, o en prueba de codición anaeróbica estricta, no se modificaría con un cambio de altitud sin aclimatación previa. Objetivo: Obtener datos locales acerca de al magnitud del efecto de una altitud efectiva de 1.700 mts. sin aclimatación sobre LS, como parámetro de desempeño aeróbico, de futbolistas jóvenes de nuestro medio que viven y entrenan a nivel del mar (NM). Voluntarios y métodos: Ensayo experimental auto-controlado con 10 voluntarios (16-18 años), futbolistas de ligas menores de un destacado club local. Dos pruebas en cicloergómetro de esfuerzo físico progresivo hasta fatiga, la primera en el Centro de Alto Rendimiento (CAR) a NM (474 mts) y la segunda en villa El Cóndor (EC; 2220mts), província de Córdoba. Protocolo de ejercicio: calentamiento 2', 30Km/hora con 50W; 3 escalones sucesivos de 3'+50W cada uno; fase final 30Km/hora de 200W hasta fatiga y/o síntomas o tiempo máximo de 15'. Mediciones LS y FC: basal, 30'' finales de cada escalón y a fatiga. Determinación LS con ACCusport®. Test de Student para datos apareados a dos colas. Resultados: 1 voluntario no cumplimentó la prueba EC(n=9). Promedio LS basal 2,1 mmol/L en NM y EC(p=0,897), diferencia media EC vs. NM más o menos error estándar de 0,5 más o menos (p=0,033), 0,9 más o menos 0,3(p=0,008) y 0,6 más o menos 0,3mmol/L(p=0,103) en escalón 1, 2 y 3 respectivamente de esfuerzo sub-máximo. En fatiga (pico), LS medio e IC95% de 7,6 (6,5-8,8) y 9,5 (7,8-11,2) mmol/L en NM y EC respectivamente (p=0.030). FC sin cambios en EC respecto a NM. 66% con mayor escala de Borg y 33% de mareos en EC. Conclusión: A una latitud efectiva de 1700mts, sin aclimatación, se verificó un menor desempeño aeróbico junto a la percepción subjetiva de mayor intensidad del esfuerzo, pudiendo...

With the same intensity of sub-maximum effort, the concentration of serum (LS) or muscular lactate is higher in Hypoxia conditions, or exercise at an altitude without acclimation, in relation with normoxia or at sea level (MSL). The highest level of lactate after fatigue or in a test of strict anaerobic condition, would not be modified when altitude changes without previous acclimation. OBJECTIVE: To abtain local data about the magnitude of the affect in SL of a effective altitude at 1,700 meters without acclimation, as a parameter of aerobic performance of young soccer players of our environment who live and train at sea level. VOLUNTEERS AND METHODS: Self-controlled experimental test with a number of 10 volunteers (16 - 18 years-old), soccer players of lower leagues from an important local sport club. Two tests in a cycle ergometer of a graded physical effort until fatigue, the first one in the Center of High Performance at MSL (474 meters) and the second one in the town El Condor (EC; 2.220 meters), province of Cordoba. Exercise Protocol: warm-up 2', 30 Km/h with 50W; 3consecutive steps of 3' + 50W each one; final phase 30 Km/h of 200W until fatigue and/or symptoms or maximum time of 15'. SL and HR measurement: basal; the last 30" of every step and in fatigue. SL determination with Accusport. Two-tailed paired test. RESULTS: 1 volunteer dropped out befote completion in EC (n=9). Mean basal SL 2.1 mmol/L at MSL and EC (p=0.897). Mean difference (MD) EC vs. MSL +/- Standard error of 0.5 +/- 0.2 (p=0.033), 0.9 +/- 0.3 (p=0.008) and 0.6 +/- 0.3 mmol/L (p=0.103) in steps 1, 2, 3 respectively of sub-maximum effort. In fatigue (the highest level), Mean SL and Confidence Interval (CI) 95% of 7.6 (6.5-8.8) and 9.5 (7.8-11.2) mmol/L at MSL and EC respectively (p=0.030). Heart Rhythm (HR) without changes in EC in relation to MSL. 66% with a greater Borg scale and 33% of dizziness at EC. CONCLUSION: At an effective altitude at 1,700 meters without...

[Body training and insulin resistance in two rural communities of Cordoba - Argentina]. / Actividad fisica e insulinorresistencia en dos comunidades rurales de Cordoba - Argentina.

UNLABELLED: From the AF, the smaller risk is controversial. The influence of the general and environmental components on IR is not know in a satisfactory way. OBJECTIVES: The influence of AF on the prevail IR in two rural communities of Córdoba with different fenotipical configuration and IR risk. MATERIAL AND METHODS: Transverse study (survey, clinical and biochemical checkup) over 1143 people of Oncativo community (ON) and Dean Funes (DF), inclusion: n = 673 (30-60 years old) Normal ECG, no diabetics. Sorts AF according to the spend of calories (Kcal/sem): a) sedentary (< 500), b) low (5001-1000), c) regular (1001-2500), and d) High (> 2500). IR is HOMA > 2.5; where [HOMA = (Glucemia * Insulina)/ 4.5]. RESULTS: AF: 31.4% sedentary, 20.2% low, 26.3% regular and 22.1% high. 16.5% IR in ON opposite 34.8% en DF (P < 0.001), IR in ON 8.2% with AF high opposite 18.8% the rest (P = 0.032), 36.8% and 34.2% like in DF (P = 0.67). With the adjusted results for age and community it was found less IMC (P = 0.002) and waist circumference (P = 0.042) than the most category of AF. The blood pressure had not a meaningful change, lipid profile or HOMA depending of AF. CONCLUSION: if a benefit of AF over IR exists, it will be conditioned for genetics and environmental primaries determiners.

Actividad fisica e insulinorresistencia en dos comunidades rurales de Cordoba - Argentina. / [Body training and insulin resistance in two rural communities of Cordoba - Argentina]

From the AF, the smaller risk is controversial. The influence of the general and environmental components on IR is not know in a satisfactory way. OBJECTIVES: The influence of AF on the prevail IR in two rural communities of Córdoba with different fenotipical configuration and IR risk. MATERIAL AND METHODS: Transverse study (survey, clinical and biochemical checkup) over 1143 people of Oncativo community (ON) and Dean Funes (DF), inclusion: n = 673 (30-60 years old) Normal ECG, no diabetics. Sorts AF according to the spend of calories (Kcal/sem): a) sedentary (< 500), b) low (5001-1000), c) regular (1001-2500), and d) High (> 2500). IR is HOMA > 2.5; where [HOMA = (Glucemia * Insulina)/ 4.5]. RESULTS: AF: 31.4

sedentary, 20.2

low, 26.3

regular and 22.1

high. 16.5

IR in ON opposite 34.8

en DF (P < 0.001), IR in ON 8.2

with AF high opposite 18.8

the rest (P = 0.032), 36.8

and 34.2

like in DF (P = 0.67). With the adjusted results for age and community it was found less IMC (P = 0.002) and waist circumference (P = 0.042) than the most category of AF. The blood pressure had not a meaningful change, lipid profile or HOMA depending of AF. CONCLUSION: if a benefit of AF over IR exists, it will be conditioned for genetics and environmental primaries determiners.