BACKGROUND Biering-Sørenson (1984) found that individuals with less lumbar extensor muscle endurance had an increased occurrence of first episode low back pain. As a result, back endurance tests have been recommended for inclusion in health assessment protocols. However, different studies have reported markedly different values for endurance times, leading some researchers to believe that the b...

Background: The revised National Institute for Occupational Safety and Health (NIOSH) lifting equation (RNLE) is commonly used for risk assessment of manual handling, and can estimate low back pain (LBP) biomechanical stressors of lifting and/or lowering of loads. The aim of this study was to evaluate manual material handling by using the RNLE, LBP, and LBP disability index (LBPDI) among worker...

A functional endurance test more specific to common occupational tasks is proposed for assessing back muscle capacity. The test involves static intermittent contractions (8-s work-rest cycles) using a predefined absolute load (90 Nm) across subjects. Since the test involved an absolute endurance task, it was hypothesized that performance would be influenced by both the strength and relative end...

Exoskeletons may form a new strategy to reduce the risk of developing low back pain in stressful jobs. In the present study we examined the potential of a so-called passive exoskeleton on muscle activity, discomfort and endurance time in prolonged forward-bended working postures. Eighteen subjects performed two tasks: a simulated assembly task with the trunk in a forward-bended position and sta...

Purpose: Low back pain (LBP) is one of the main causes of disability in adults. Approximately 80% of LBPs lead to chronic nonspecific low back pain (CNSLBP). Damages to back region may be due to weak musculoskeletal structure, impaired muscle or joint flexibility, changes in muscle tone, and reduced strength and endurance. A set of exercises by small ball was designed by the corresponding and f...

For decades, the deconditioning process has been held responsible for the development and persistence of low back pain associated disability. It was hypothesized that, due to chronic low back pain (CLBP), patients diminish normal activities (also called disuse) and develop, besides societal and emotional problems, physical deconditioning signs such as loss of muscle strength and endurance as we...

STUDY DESIGN Experimental randomized crossover. OBJECTIVE The aim of the study was to determine whether sitting on a ball for 90 min/d instead of a chair has an effect on low back pain (LBP), low back disability, and/or core muscle endurance. SUMMARY OF BACKGROUND DATA LBP may result from prolonged sitting. It has been proposed that replacing chairs with stability balls can diminish LBP in ...

This study investigates changes in lumbar erector spinae (LES) muscle endurance, perceived low-back pain (LBP), and exercise fatigue older adults, analyzes the trends of these during a 5-week exercise. Sixteen adults with LBP were equally randomly divided into two groups: experimental group incline-standing control level-standing positions. They separately treated tasks 10 seconds endurance tes...

abstract   background: low back pain (lbp) is still a medical problem in 21 st century. having back pain and being disabled by it are not the same thing. it is common to come across with patients who have simple back pain but surprisingly totally disabled and vice versa. in clinical practice, it is important to have a proper evaluation of disability and making a clear distinction between pain a...