Relationship between physical activity and intramyocellular lipid content is different between young and older adults

Purpose Intramyocellular lipid (IMCL) is influenced by physical exercise; however, whether the habitual level of physical activity affects resting IMCL content remains unclear. The purpose of this study was to determine the relationship between physical activity levels and resting IMCL content in yo...

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Bibliographic Details
Published in:European journal of applied physiology 2019-01, Vol.119 (1), p.113-122
Main Authors: Hioki, Maya, Kanehira, Nana, Koike, Teruhiko, Saito, Akira, Takahashi, Hideyuki, Shimaoka, Kiyoshi, Sakakibara, Hisataka, Oshida, Yoshiharu, Akima, Hiroshi
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biomedicine
Exercise
Human Physiology
Light intensity
Magnetic resonance spectroscopy
Occupational Medicine/Industrial Medicine
Older people
Original Article
Physical activity
Sports Medicine
Young adults
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Summary:Purpose Intramyocellular lipid (IMCL) is influenced by physical exercise; however, whether the habitual level of physical activity affects resting IMCL content remains unclear. The purpose of this study was to determine the relationship between physical activity levels and resting IMCL content in young and older adults. Methods In total, 15 nonobese young adults (21.0 ± 0.0 years) and 15 older adults (70.7 ± 3.8 years) were recruited. Time spent performing physical activities for 10 days was assessed using a three-dimensional ambulatory accelerometer, and intensity was categorized as light [ 6.0 METs). Physical activity level was calculated as the product of METs and time spent performing physical activities (MET h) at each intensity level. The IMCL content in the vastus lateralis was determined using 1 H-magnetic resonance spectroscopy after overnight fasting. Results No significant differences in IMCL content were observed between young and older adults. Vigorous intensity physical activity (time and MET h) was significantly lower in older than young adults ( p  
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-018-4005-x