Effects of Various Sensory Conditioning Disturbances on Postural Control in Firefighters with Chronic Non-specific Low Back Pain
Objective:The paper investigates variations in postural control abilities across differ-ent sensory conditions among firefighters with chronic nonspecific low back pain(CNLBP)compared to those without,and scrutinizes the characteristics and challenges of postural control in firefighters afflicted with CNLBP.Its objective is to establish a scientific foundation for de-veloping training and rehabilitation plans aimed at enhancing the postural control abilities of CNLBP-afflicated firefighters.Methods:Firefighters with CNLBP(n=10)contrasting firefight-ers(n=10)were enrolled as subjects.The former group underwent assessment using the visual analogue scale(VAS)and the Oswestry disability index(ODI)questionnaire to evaluate the degree of pain and functional disability.The Vx,Vy,path length and sway velocity of the standing pressure center of all subjects were collected under conditions of eyes open,eyes closed,eyes open with a balance pad,and eyes closed with a balance pad.Subsequently,the core strength was evaluated by assessing plank hold and 3 min bent-leg sit-ups,in order for a two-way repeat-ed measures ANOVA and correlation analysis on the test results.Results:Significant differences emerged in the main effects of sensory conditions on Vx(F=51.557,P＜0.01,η2p=0.741),Vy(F=75.846,P＜0.01,η2p=0.808),path length(F=76.667,P＜0.01,η2p=0.810),and sway velocity(F=76.592,P＜0.01,η2p=0.810).Moreover,there were significant differences in the main effects of CNLBP on Vx(F=13.154,P＜0.01,η2p=0.422),Vy(F=6.106,P＜0.05,η2p=0.253),path length(F=13.059,P＜0.01,η2p=0.420),and sway velocity(F=13.058,P＜0.01,η2p=0.420).Additionally,the results revealed interaction effects between CNLBP and sensory conditions on Vx(F=11.822,P＜0.01,η2p=0.396),Vy(F=4.961,P＜0.05,η2p=0.216),path length(F=9.206,P＜0.01,η2p=0.338),and sway velocity(F=9.203,P＜0.01,η2p=0.338).Under the eyes closed condition,the VAS and ODI scores of the CNLBP-afflicted subjects showed a significant positive correlation with sway velocity and path length under eyes closed condition(P＜0.05).In the eyes closed with a bal-ance pad condition,the VAS and ODI scores of these subjects were positively correlated with Vx,sway velocity,and path length(P＜0.05);plank hold duration is negatively correlated with Vx,sway velocity,and path length(P＜0.05);the number of sit-ups in 3 min is negatively corre-lated with Vy,sway velocity,and path length(P＜0.05).Conclusions:The combined effects of somatosensory and visual disturbances are the most significant for CNLBP-afflicted firefighters,with visual disturbance being greater than somatosensory disturbance.Both somatosensory and visual disturbances individually exert a greater influence on lateral stability compared to anteri-or-posterior stability in CNLBP-afflicted firefighters.Regarding the ten contrasting firefighters,their anterior-posterior stability is more affected than their lateral stability.Meanwhile,the combined effects of somatosensory and visual disturbances have a greater impact on anterior-posterior stability than on lateral stability in both groups.The results also indicate that visual disturbance has a more pronounced impact on the lateral stability of firefighters with CNLBP than those without.Moreover,the combined effects of somatosensory and visual disturbances significantly decrease postural stability in both groups,particularly in the CNLBP-afflicted group,which may be associated with the severity of low back pain and core muscle strength in this group.
firefighterschronic nonspecific low back painpostural control abilitysomatic sensationvisual sense
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