HIGHLIGHTS
This study found no correlation between trunk instability and pressure pain threshold (PPT).
PPT did not correlate with the maximum isometric strength and endurance of the trunk muscles in women with chronic low back pain.
Trunk instability, maximum isometric strength and endurance were assessed using replicable tests for the population.
ABSTRACT
BACKGROUND AND OBJECTIVES:
Chronic nonspecific low back pain (CNLBP) is a public health issue. Dysfunctions in muscle activation and spinal stability are estimated to directly impact pain intensity. Additionally, senior women experience greater decline in muscle function due to aging, rendering this demographic more susceptible to developing low back pain. The aim of this study was to analyze the correlation between core muscle instability, strength, and endurance with pressure pain threshold in senior individuals with CNLBP.
METHODS:
This is a quantitative observational study, with a descriptive cross-sectional design, conducted on women aged 60 to 79 years. The pressure pain threshold (PPT). The pressure pain threshold (PPT) was assessed using a pressure algometer applied to the paravertebral and anterior tibial musculature. Trunk instability was assessed on both a stable and an unstable seat, positioned atop a force platform that provided real-time displacement of the pressure center. Maximum isometric strength and endurance of trunk flexors and extensors were assessed using the McGill protocol. Person's correlations coefficient (r) was calculated, and the data were presented as mean and standard deviation. The significance level was set at p<0.05.
RESULTS:
This study included 49 senior women (67,3±5,6 years; body mass index of 28,5±5,2 kg/m2; pain intensity of 4,6±2,3 on a 0-10scale). No correlation was observed between PPT at L3, L5 and TA with lumbar instability, maximum isometric strength and trunk muscle endurance.
CONCLUSION:
In this study, no correlation was found between lumbar instability, maximum isometric strength and trunk muscle endurance with the PPT in senior women with CNLBP.
Keywords:
Abdominal core; Chronic pain; Core stability; Pain threshold
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