title: [Changes of rat respiratory and locomotory muscles during aerobic exercise training in continuous and interval regimens].
abstract: Male Wistar rats were treadmill-trained for 8 weeks using one of the two regimens: with the constant running speed or with alternating high-speed and low-speed intervals. Both training regimens led to an increase of rat aerobic capacities and to a higher citrate synthase activity in the medial head of gastrocnemius muscle. No differences between the effects of two training regimens were observed. However, in contrast to constant-speed training the interval one resulted in myocardium hypertrophy and also in less pronounced changes in diaphragm muscle, such as slow-direction shift of myosin phenotype and reduction of muscle fiber cross-sectional area. Neither of the training regimens had an effect on corticosterone and thyroid hormones levels in rat blood, whereas the interval training resulted in a higher level of testosterone. Anabolic influence of testosterone during interval aerobic training may be favorable for heart hemodynamic capacity and force characteristics of the diaphragm.
authors.forename: A A
authors.initials: AA
authors.lastname: Borzykh
authors.forename: I V
authors.initials: IV
authors.lastname: Kuz'min
authors.forename: A A
authors.initials: AA
authors.lastname: Mart'ianov
authors.forename: A S
authors.initials: AS
authors.lastname: Borovik
authors.forename: A P
authors.initials: AP
authors.lastname: Sharova
authors.forename: O S
authors.initials: OS
authors.lastname: Tarasova
authors.forename: O L
authors.initials: OL
authors.lastname: Vinogradova
mesh_terms: D000818:Animals; D002950:Citrate (si)-Synthase / Q000378:metabolism*; D003345:Corticosterone / Q000097:blood; D003964:Diaphragm / Q000737:chemistry*; D019344:Lactic Acid / Q000097:blood; D008297:Male; D018482:Muscle, Skeletal / Q000737:chemistry*; D009218:Myosins / Q000096:biosynthesis*; D010805:Physical Conditioning, Animal / Q000379:methods*; D051381:Rats; D017208:Rats, Wistar; D012420:Running; D013739:Testosterone / Q000097:blood; D013963:Thyroid Hormones / Q000097:blood
chemical_list: D013963:Thyroid Hormones; D019344:Lactic Acid; D013739:Testosterone; D002950:Citrate (si)-Synthase; D009218:Myosins; D003345:Corticosterone