Abstract
The aim of this study was to verify the acute effects of the application of local
vibration on upper limbs during resistance training on the number of maximum repetitions,
metabolic and hormonal responses. 32 volunteers performed a maximum voluntary contraction
test during a lat pulldown exercise. After the test, all volunteers underwent one
conventional resistance training session and one resistance training session with
local vibration. In both interventions, volunteers performed 4 sets with the highest
possible number of repetitions of the lat pulldown exercise at 55% of maximum voluntary
contraction. During the vibratory resistance training intervention, vibration was
locally applied (20-Hz and 12-mm). During the conventional resistance training, volunteers
performed the same procedures without vibration. Blood samples were taken at each
experimental session before and 5 min after the end of each intervention. No significant
differences were observed in number of maximum repetitions between the series of vibratory
and conventional training. Serum testosterone, cortisol and lactate were significantly
increased after 2 interventions. Vibratory resistance training induced greater increases
in testosterone and lactate concentrations. No significant changes were found in creatine
kinase, creatinine or urea concentration. These data indicate that local vibration
increases the metabolic and anabolic response to the resistance training, without
changing the training volume.
Key words
vibration exercise - strength training - muscle strength
