Comparing consumption oxygen during and after squat exercise in Smith Machine and whole-body vibration

Currently the physical exercise in whole body vibration platforms has become popular among people that frequenting gym and physiotherapy clinics. The objective of this study was to compare the oxygen consumption in the squat exercise performed at Smith Machine and squat performed on the vibration platform following the protocols usually referenced in both types of exercise (with load of 70% in the Smith Machine and unloaded on the vibration platform). The sample consisted of eight male subjects, with a mean age of 22.75 ± 2.05 years, an average body mass 74.50 ± 9.50kg, a stature of 1.79 ± 0.63m and estimated body fat percentage of 5.01 ± 0.94%. The volunteers performed two exercise sessions, one in the Smith Machine (AGSM) and the other on the vibration platform (AGPP). Each session consisted in 5 sets of 10 repetitions each, with a cadence of 40 beat.min^-1. The load used in the exercise AGSM performance was 70% of 1RM and in the AGPP was used a vibration frequency of 50 Hz, during 60 seconds in high amplitude. The order of the sections was randomized, with seven days apart. The AGPP session presented VO₂ absolute = 0.95 ± 0.21L/min, VO₂ relative = 12.86 ± 2.43ml/kg/min, and HR = 93.69 ± 10.55 beats/min; and the AGSM session presented VO₂ absolute = 1.33 ± 0.29 L/min, VO₂ relative = 17.91 ± 2.70 ml/kg/min, and HR = 120.69 ± 14.21 beats/min. The VO₂ and HR values of the AGSM session were significantly higher than that found in AGPP session.