title: Effect of meal timing after resistance exercise on hindlimb muscle mass and fat accumulation in trained rats.
abstract: To study the effect of meal timing after exercise on body composition, 20 male rats were assigned to either a group fed a meal right after exercise (R) or a group fed a meal 4 h after exercise (L). Resistance exercise (squatting) was conducted from 6:00 to 7:00, 3 d/wk for 10 wk. Meals were consumed from 7:00 to 8:00 and from 19:00 to 20:00 for R, and from 11:00 to 12:00 and from 19:00 to 20:00 for L. The room was lighted from 7:00 to 19:00. After 10 wk, the body weight was comparable between the groups. The hindlimb muscle weight was higher in R than in L by 6% (p < 0.05), whereas the sum of the weight of perirenal, epididymal, and mesenteric adipose tissues was lower in R than in L by 24% (p < 0.01). The soleus lipoprotein lipase (LPL) activity was higher in R than in L by 70% (p < 0.01), and the activity negatively correlated with the adipose tissue weight (r = -0.49, p < 0.05). These results suggest the possibility that ingesting a meal right after resistance exercise may contribute to an increase in the muscle mass and to a decrease in the adipose tissue compared to ingesting a meal several hours later.
authors.affiliation: Institute of Health and Sports Sciences, University of Tsukuba, Ibaraki, Japan. msuzuki@taiiku.tsukuba.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Suzuki
authors.forename: T
authors.initials: T
authors.lastname: Doi
authors.forename: S J
authors.initials: SJ
authors.lastname: Lee
authors.forename: K
authors.initials: K
authors.lastname: Okamura
authors.forename: S
authors.initials: S
authors.lastname: Shimizu
authors.forename: G
authors.initials: G
authors.lastname: Okano
authors.forename: Y
authors.initials: Y
authors.lastname: Sato
authors.forename: Y
authors.initials: Y
authors.lastname: Shimomura
authors.forename: T
authors.initials: T
authors.lastname: Fushiki
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology* / Q000201:enzymology; D000818:Animals; D001823:Body Composition; D004822:Epididymis; D005502:Food; D006614:Hindlimb; D008071:Lipoprotein Lipase / Q000378:metabolism; D008297:Male; D018482:Muscle, Skeletal / Q000033:anatomy & histology* / Q000737:chemistry; D009929:Organ Size; D005082:Physical Exertion; D051381:Rats; D017207:Rats, Sprague-Dawley; D013997:Time Factors
chemical_list: D008071:Lipoprotein Lipase