Change of Safe Needling Depth at Acupoint GB21 according to Posture and Breathing

Table 1

Characteristics of the study population.

	Men	Women	Total
Sample	24	28	52
BMI (kg/m^2)
Underweight (<18.5 kg/m^2)	2	9	11
Normal weight (≥18.5 & <25 kg/m^2)	17	17	34
Over weight (≥25 kg/m)^2	5	2	7

: body mass index.