Document Detail

Age and secular effects on muscular strength of indigenous rural adults in Oaxaca, Southern Mexico: 1978-2000.
MedLine Citation:
PMID:  20812882     Owner:  NLM     Status:  In-Data-Review    
Purpose: To evaluate age and secular changes in strength of rural Zapotec adults in Oaxaca between 1978 and 2000. Methods: Grip strength, height and weight were measured in 1978 (n = 247, 19-82 years) and 2000 (n = 407, 19-89 years); 35 males and 52 females were measured in both years. MANCOVA was used for comparisons by age and year. Results: Grip strength and strength/height decline with age; the slope is greater after 40-49 years. Both are significantly greater in 2000 compared to 1978 only in males 19-29 and 30-39 years and in females 30-39 years. Strength and strength/height decline at a slightly faster rate in females than males during young adulthood, but at similar rates in both sexes during middle age. Strength/mass is greater in 1978 than 2000, but differences are not significant in most age groups. Strength/mass declines linearly with age and rates do not differ between young and older adults of both sexes. Left grip strength/left mid-arm muscle circumference shows a pattern across age similar to strength/mass in both sexes. Conclusion: Grip strength and strength per unit size declined with age. Strength and strength/height tended to increase between 1978 and 2000, while the opposite occurred for strength/weight. Results likely reflected in changes in habitual physical activity patterns associated with the transition from subsistence agriculture to less economic dependence upon agriculture.
Robert M Malina; Maria Eugenia Peña Reyes; Citlali Gonzalez Alvarez; Bertis B Little
Publication Detail:
Type:  Journal Article     Date:  2010-09-03
Journal Detail:
Title:  Annals of human biology     Volume:  38     ISSN:  1464-5033     ISO Abbreviation:  Ann. Hum. Biol.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-01-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404024     Medline TA:  Ann Hum Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  175-87     Citation Subset:  IM    
Department of Kinesiology and Health Education, University of Texas at Austin and Research Professor, Tarleton State University, Stephenville, TX, USA.
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