Analysis of Biomechanical Characteristics of Therapist's Ground Reaction and Contact Hand Force and Time According to Table Height During Spinal Manipulation

Analysis of Biomechanical Characteristics of Therapist's Ground Reaction and Contact Hand Force and Time According to Table Height During Spinal Manipulation

Objective: This study aimed to analyze the effects and characteristics of the height of the treatment table on the force and time of ground reaction (GR) and contact hand (CH) generated from the therapist's feet to generate thrust during spinal manipulation (SM). Design: A cross-sectional survey studyMethods: Thirty-six healthy subjects were recruited. SM was performed on the ilium using a knee-high table, where the therapist felt it was easy to control the subject’s posture and body shape and comfortable to generate force, as well as a relatively high thigh-high table. The force and time generated by the therapist's GR and CH were simultaneously measured through a force plate. Results: As a result, there was a significant difference in peak force and rundown force at the therapist's GR according to the table height (p<0.05). In the therapist's CH, there was a significant difference between PreMin (preload minimum) force and peak force (p<0.05), and there was a significant difference between the time from PreMin to peak and the time of the entire section (p<0.05). Conclusions: As a result, the generation of increased CH force and faster thrust duration were confirmed by mobilizing the reduced GR force of the therapist to generate thrust than the relatively high table on the knee-high table.