Resumen

CLAROS, Nataniel et al. BEHAVIOR OF SERUM MUSCULAR ENZYMES ASSOCIATED WITH UPHILL CYCLING OF 3428 M.A.S.L.. Rev. Méd. La Paz [online]. 2013, vol.19, n.1, pp.27-34. ISSN 1726-8958.

Objectives: To determinate the behavior of creatine kinase (CK), lactate dehydrogenase (LH) after uphill cycling of 3428 meters in 63 kilometers. Design: Field test Population: Ciclists of 18 years of age or older, without gender exclusion, that ascent from Yolosa (1229 m.a.s.l) to the summit, La Cumbre (4657m.a.s.l). who underwent to anthropometric measurement, blood glucose, haematocrit, hemoglobin test, oximetry and serum CK and LH test as markers of muscle fatigue before and after uphill cycling. 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: 43 subjects were studied, with an average age of 42 years, corresponding to 37 (86%) males. The average height was of171 cm and average BMI of 23.200 for an average body fat of 16%. In relation to provenance, 29 subjects were from La Paz, Bolivia (67,4%). Competitors were classified by age and training level on the following categories: A: 11 subjects (25,6%), B: 7 subjects (16,3%), C: 14 subjects (32,5%), D: 7 subjects (16,3%) and Elite: 4 subjects (9,3%). Average heart rate before and after the ascent was of 66 and 90 beats per minute respectively. Oximetry revealed a basal O2 saturation of96% and 85% after arrival. The average for serum muscle enzymes were: Basal LDH: 146 mg/dl, arrival LDH: 223 mg/dL, basal CK: 187 mg/dl and arrival CK: 392 mg/dL. All studied variables had a P value of 0,001. Conclusion: The increasing values of serum muscle enzymes to measure muscle fatigue in an amateur group of cyclists with consistent training after uphill cycling seem to have an inverse relationship with training. No negative event was observed, by which this work supports the practice of sports at high altitude

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