title: Immediate effects of dynamic sitting exercise on the lower back mobility of sedentary young adults.
abstract: [Purpose] The aim of this study was to investigate the effects of dynamic sitting exercises during prolonged sitting on the lower back mobility of sedentary young adults. [Subjects and Methods] Seventy-one subjects aged between 18-25 years participated in this study. Following a randomized crossover study design, subjects were randomly assigned to two groups: sitting only and dynamic sitting exercise. The dynamic sitting exercise was a combination of lower back hyperextension and abdominal drawing-in movements which were repeated 6 times in a 1-minute period and performed every 20 minutes during a 2-hour sitting session. Lumbar range of movement was measured with the modified-modified Schober test, and the pain intensity was evaluated using the visual analog scale. [Results] After the experiment, the lumbar range of movement was significantly impaired in the sitting only group; however, it was significantly improved in the dynamic sitting exercise group. There were significant differences in lumbar range of movement of both flexion and extension between the groups. No significant difference in pain intensity between the groups was found. [Conclusion] These results suggest that dynamic sitting exercises during prolonged sitting can prevent decreases in lumbar range of movement in both back flexion and extension following a 2-hour sitting period.
authors.affiliation: Research Center in Back, Neck, Other Joint Pain and Human Performance (BNOJPH), Faculty of Associated Medical Sciences, Khon Kaen University, Thailand.
authors.forename: Uraiwan
authors.initials: U
authors.lastname: Chatchawan
authors.affiliation: Kutchap Hospital, Thailand.
authors.forename: Unthika
authors.initials: U
authors.lastname: Jupamatangb
authors.affiliation: Pan Beauty Care Clinic, Thailand.
authors.forename: Sunisa
authors.initials: S
authors.lastname: Chanchitc
authors.affiliation: Research Center in Back, Neck, Other Joint Pain and Human Performance (BNOJPH), Faculty of Associated Medical Sciences, Khon Kaen University, Thailand.
authors.forename: Rungthip
authors.initials: R
authors.lastname: Puntumetakul
authors.affiliation: Research Center in Back, Neck, Other Joint Pain and Human Performance (BNOJPH), Faculty of Associated Medical Sciences, Khon Kaen University, Thailand.
authors.forename: Wanida
authors.initials: W
authors.lastname: Donpunha
authors.affiliation: Research Center in Back, Neck, Other Joint Pain and Human Performance (BNOJPH), Faculty of Associated Medical Sciences, Khon Kaen University, Thailand ; Graduate School of Human Health Sciences, Tokyo Metropolitan University, Japan ; Future Institute for Sport Sciences, Japan.
authors.forename: Junichiro
authors.initials: J
authors.lastname: Yamauchi
keywords: Back exercise; Flexibility; Long sitting