Details:

Alternative Title:
Environ Health Insights
Publisher's site:
http://dx.doi.org/10.4137/EHI.S15257
Personal Author:
Rader, Erik P. ; Miller, G. Roger ; Chetlin, Robert D. ; Wirth, Oliver ; Baker, Brent A.
Rader, Erik P. ; Miller, G. Roger ; Chetlin, Robert D. ; Wirth, Oliver ; Baker, Brent A. Less -
Description:
Investigation of volitional animal models of resistance training has been instrumental in our understanding of adaptive training. However, these studies have lacked reactive force measurements, a precise performance measure, and morphological analysis at a distinct phase of training - when initial strength gains precede muscle hypertrophy. Our aim was to expose rats to one month of training (70 or 700 g load) on a custom-designed weight-lifting apparatus for analysis of reactive forces and muscle morphology prior to muscle hypertrophy. Exclusively following 700 g load training, forces increased by 21% whereas muscle masses remained unaltered. For soleus (SOL) and tibialis anterior (TA) muscles, 700 g load training increased muscle fiber number per unit area by ∼20% and decreased muscle fiber area by ∼20%. Additionally, number of muscle fibers per section increased by 18% for SOL muscles. These results establish that distinct morphological alterations accompany early strength gains in a volitional animal model of load-dependent adaptive resistance training.
Subject:
[+]
Fiber Cross-sectional Area
Fiber Number
Operant Conditioning
Original Research
Resistance Exercise
Stereology

Source:
Environ Health Insights. 2014; 8(Suppl 1):1-9.
Document Type:
Journal Article
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:ff4982b045955fae7255293c6145d2ea8da6ae5c023a0b9a55393b64eca92e03
File Type:

Supporting Files

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