Abstract
This study investigates changes in lumbar erector spinae (LES) muscle endurance, perceived low-back pain (LBP), and perceived exercise fatigue in older adults, and analyzes the trends of these changes during a 5-week lumbar exercise. Sixteen older adults with LBP were equally and randomly divided into two groups: the experimental group with incline-standing and the control group with the level-standing positions. They were separately treated with lumbar exercise tasks and 10 seconds of muscle endurance tests using surface electromyography (sEMG). There was a trend of changes in both groups. The exercise tasks led to increase LES muscle endurance in the experimental group (53.7%) and the control group (45.4%) and decrease perceived LBP score significantly with the incline-standing position. There was no significant difference between the two groups in perceived exercise fatigue (p>0.05). Trunk flexion and extension with an incline-standing position can be an effective method to increase LES muscle endurance and reduce LBP in older adults.
Highlights
Physical exercises provide a wide range of interventions from aerophilic exercise to flexibilitybased stretching and muscle-strengthening exercise [1]
The muscle contraction of the experimental group was 3.27% higher than that of the control group
The muscle contraction of the experimental group was 5.4% higher than that of the control group
Summary
Physical exercises provide a wide range of interventions from aerophilic exercise to flexibilitybased stretching and muscle-strengthening exercise [1]. LBP is majorly associated with muscle stiffness or backache located in the lumbar region of the trunk, most exercise methods target lumbar erector spinae (LES) muscle for greater trunk stability. Bending exercises have shown a greater trunk flexion on a decline standing position while an incline standing position triggers a greater trunk extension [13] It is not well established whether squatting and bending postures with the incline standing position influence trunk muscle endurance in older adults with LBP conditions. Based on this notion, this study posits that strong LES muscle endurance is vital for lumbar spine stability to minimize perceived LBP and perceived trunk fatigue
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