The Relationship of Lactate to 1-Mile Walk Performance in Women Aged 60 to 70 Years

in Journal of Aging and Physical Activity
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The purpose of this study was to examine the relationship between selected physiological variables and lactate accumulation at the end of a l-mile walk test (MWT) in older women (mean ± SD: 64.6 ± 3.1 years). Seventeen women with a V˙O2peak (ml · kg-1 · min-1) of 21.1 ± 4.2 volunteered to participate. Physiological data were obtained via a COSMED K2 miniaturized O2 analyzer with telemetric capabilities during a maximal treadmill (TM) test and MWT. Blood samples were obtained from the ear lobe for lactale analysis immediately before and after the treadmill test and MWT. Subjects performed the MWT in 15.4 ± 1.4 min at an intensity of 76% of V˙O2 peak and 86% of HRmax. The blood lactate accumulated at the end of the MWT was 2.61 ± 1.47 mmol/L. Peak lactate following the maximal treadmill test was 3.8 ± 1.42 mmol/L. HR during the test was significantly related with blood lactate (r= .65, p< .01). The lactate values observed during the lest suggest that the I-mile walk test is a suitable field testing procedure for older women.

Carmelo Bazzano is with the Department of Human Performance and Fitness, University of Massachusetts, Boston. MA 02143. Lee N. Cunningham is with the Department of Physical Education. Fitchburg Stale College, Fitchburg. MA 01420. Giovanni Cama is with the Department of Endocrinology and Sports. ISEF Statale, Rome, Italy. Tony Falconio is with the Department of Intensive Care and Sports Medicine, Lanciano Hospital, Lanciano, Italy, Direct correspondence to Lee N. Cunningham.