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Spontaneous running activity in male rats - Effect of ageVariations in the intensity and the patterns of spontaneous running activity in wheel cages were studied in male rats aged 7 weeks to one year. Daily running records were obtained for periods of 12 mo, and 24-hour recordings were made for selected runners in order to study variations in running activity during the day. The data indicate that for rats running over two miles/day, the maximum running intensity can be divided into two groups: a group of high achievers running 8 miles/day; and a group of moderate achievers running 4.8 miles/day. For both groups spontaneous activity reached a maximum after 4-5 weeks. An hourly pattern of running activity during the day was identified in rats of increasing age who averaged 9.0, 4.5, 2.6, and 1.2 miles/day, respectively. Progressive losses were observed in both the speed and the duration of spontaneous running as the rats increased in age, with the intensity of exercise falling below 2 miles/day after 7-8 months of age.
Document ID
19850052213
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mondon, C. E.
(NASA Ames Research Center Moffett Field, CA, United States)
Dolkas, C. B.
(NASA Ames Research Center Moffett Field, CA, United States)
Sims, C.
(NASA Ames Research Center Moffett Field, CA, United States)
Reaven, G. M.
(NASA Ames Research Center Moffett Field; Stanford University, Stanford; U.S. Veterans Administration, Medical Center, Palo Alt, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1985
Publication Information
Publication: Journal of Applied Physiology
Volume: 58
ISSN: 0161-7567
Subject Category
Life Sciences (General)
Accession Number
85A34364
Distribution Limits
Public
Copyright
Other

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