the effect of resistance exercise intensity on plasma visfatin levels and its relationship with insulin resistance and related hormones

the aim of the present study was to investigate the response of plasma visfatin to resistance exercise intensity and its relationship with insulin resistance, growth hormone and il-6. after familiarization and determining their maximum strength (1-rm), 15 healthy young subjects (age: 26.2±4.1 yr, weight: 75.1±9.1 kg) performed three resistance exercise sessions at intensities of 30%, 55% and 80% of 1-rm with equal volumes randomly with a one-week interval. blood samples were collected before and immediately after the exercise and analyzed to measure glucose, insulin, growth hormone, interlukin-6 (il-6) and visfatin. results showed no significant differences among the responses of plasma visfatin, interlukin-6 and insulin resistance index to three different resistance exercise intensities (p>0.05). irrespective of intensity, a session of resistance exercise had a significant effect (p0.05). based on the findings of the present study, it could be concluded that resistance exercise intensity was not an effective factor for the response of visfatin, il-6 and insulin resistance index which might be due to small differences in energy cost of resistance exercise at different intensities but equal volumes. since there was no significant relationship between visfatin and insulin resistance in response to resistance exercise, this adipokine cannot be involved in insulin resistance during exercise.