Abstract

CLAROS, Nataniel et al. BIOCHEMICAL, PULMONAR Y AND HEMODYNAMIC CHANGES ASSOCIATED TO THE ADJUSTMENT OF A CONSTANT CLIMB OF 3428 METERS IN BICYCLE. Rev. Méd. La Paz [online]. 2012, vol.18, n.1, pp.25-32. ISSN 1726-8958.

Objective: Compare changes in biochemical , hemodynamic and pulmonary parameters before and after an abrupt climb of 3428 meters cycling Design: Field Test. Population: Participants older than 18 years of age, without gender exclusion, that ascent from Yolosa (1229 m.a.s.l.) to the summit, La Cumbre (4657 m.a.s.l.). Competitors underwent oximetry, spirometry, blood glucose, hematocrit and Hb tests before and after the climb. Venue: Hospital Obrero No. 1, Caja Nacional de Salud La Paz - Bolivia. Research Institute of Health and Development (IINSAD). Estimated size of the sample: Not outstanding Results: Ninety one participants were studied with an overall average age of 39.50 years ofage, corresponding to 77 males (84.6%). The average heightand weight were 1.71 meters and 73 kg respectively. Participants were from 9 different places of origin, the largest turnout was from La Paz 38 (41.8%), Cochabamba 27 participants (29.75%) and Santa Cruz with 17 participants (18.7%). Comparative demographic parameters of the 3 most representative departments show older participants in the group of La Paz (44 years ofage) and youngest in Cochabamba with 31 years ofage. Weight and height averages show similar parameters in the 3 departments. Competitors from Cochabamba had a BMI slightly higher than the other departments (26.30 Kgs/m2), and the only ones with healthy BMI were those from La Paz (<a 25 Kgs/m2). The whole group had a precompetitive average blood glucose of 107 mg / dl (SD ± 11.716 range from 84 to 132 mg / dl), blood glucose was not considered at arrival due to malfunction of equipment, not calibrated to function properly at 4800 m.a.s.l. Precompetitive average heart rate (HR) was 68 beats per minute, at arrival was 152 beats per minute (p = 0.001). The basal average O2 saturation was 97% and 90% arrival. The average basal hematocrit (Hct) was 48%, which corresponds to an average hemoglobin (Hb) of 16.15 g/dl with a hematocrit of 69% and a Hb of 23 g/dl at arrival with a P value of 0.001. Average forced capacity (FVC) initially was 6,16 liters expressed as a percentage for age, sex and weight of each competitor 118% of normal, compared with a FVC of 4,76 liters at arrival with an overall average of109% with respect to normal. Conclusion: In the amateur group of cyclists with consistent training, the hemodynamic and rerspiratory parameters assigned is not significantly altered. This supports the thesis that practice of sports at high altitude does not increase the risk of adverse effects.

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