Although strength and conditioning exercises have been prescribed to enhance performance and prevent injury in sailors, little is known about these exercises in comparison to the demands placed on the sailor's musculature while hiking maximally. Because of the difficulty in collecting hiking-related data on water, a 3-minute maximal hiking test (HM180) has been previously developed for use in t...

[Purpose] The purpose of this study was to assess the effects of complex rehabilitation training on chronic low back pain. [Subjects and Methods] Complex rehabilitation training for lumbar isometric muscle strength was conducted for 12 weeks for males (n=10) and females (n=10) with chronic low back pain, who were aged in their 30s. [Results] Isometric strength of lumbar extension was increased ...

 ABSTRACT Study design: A cross-sectional non-experimental study. Objectives: To collectively detect the reliability and feasibility of the five types of clinical tests that have been used to measure endurance of the trunk muscles in subjects with and without low back pain (LBP) and identifY the sensitivity of each test to predict the probability of the occurrence ofLBP. Background: Testing spi...

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STUDY DESIGN Cohort study of patients with acute low back pain undergoing physical therapy. OBJECTIVES Examine the reliability and validity of the Physical Impairment Index in a group of patients with acute low back pain and determine the responsiveness and minimum detectable change of the index and its component tests. SUMMARY OF THE BACKGROUND DATA The Physical Impairment Index was origin...

Objective To investigate the reliability and validity of a new method for isometric back extensor strength measurement using a portable dynamometer. Methods A chair equipped with a small portable dynamometer was designed (Power Track II Commander Muscle Tester). A total of 15 men (mean age, 34.8±7.5 years) and 15 women (mean age, 33.1±5.5 years) with no current back problems or previous histo...

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...

This paper describes the performance of pianar back-to-back Barrier-N-N+ (bbBNN) devices for mmand submm wave multiplier applications. A technique has been deveioped for characterizing pianar bbBNN devices with Vector Network Anaiyzer, which gives both the series resistance and voitage dependent capacitance of the device. Resuits show that bbBNN devices do not have a high series resistance iike...