Table 1 . General characteristics of subjects .

SD: standard deviation; BMI: body mass index.

Variable	Total (N = 35)
Age, years
Mean ± SD	31.0 ± 2.87
Median	31.00
Range, min–max	24.00–40.00
Sex, n (%)
Male	23 (65.7)
Female	12 (34.3)
BMI (kg/m 2 )
Mean ± SD	22.56 ± 1.54
Median	22.60
Range, min–max	18.03–24.84
Heart rate before compression rate of 100 times/minute, times/minute
Mean ± SD	85.00 ± 8.00
Median	86.00
Range, min–max	63.00–101.00
Heart rate before compression rate of 120 times/minute, times/minute
Mean ± SD	85.00 ± 7.00
Median	86.00
Range, min–max	63.00–101.00