Dietary protein consumption maximizes the anabolic response during resistance training (RT) by triggering muscle protein synthesis and providing the indispensable amino acids for a net positive protein balance. Leucine is considered the key amino acid in this process, suggesting that differences in protein quality may influence RT-induced gains in muscle mass and strength. In general, plant-based protein sources have lower leucine concentrations than animal-based protein sources and human skeletal muscle. In this respect, despite acute evidence on lower anabolic properties of plant- vs. animal-based protein, the effects of an exclusive plant-based dietary protein diet on RT-induced adaptations are currently unknown.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
38
supplementation individually adjusted to 1.6g/kg/day
supplementation individually adjusted to 1.6g/kg/day
University of Sao Paulo
São Paulo, São Paulo, Brazil
Muscle cross-sectional area
assessed by mode-B ultrasound
Time frame: 12 weeks
Muscle strength
assessed by leg-press one-maximum-repetition
Time frame: 12 weeks
Leg lean mass
assessed by Dual-energy X-ray absorptiometry
Time frame: 12 weeks
fiber cross-sectional area
assessed by muscle biopsy (vastus lateralis)
Time frame: 12 weeks
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