The effect of two exercise protocols on lumbar spine sagittal range of motion.

Background: Current research has shown that exercise induces an increase in spinal range of motion (ROM) which is primarily due to spinal creep. However, there is a lack of consensus regarding the cause of spinal creep; some believe it is due to the warm up effect of exercise while others believe it is the result of the position of the lumbar spine during the exercise.

Aim: The aim of this prospective study is to investigate first whether a change in lumbar spine ROM is seen following exercise and second whether a greater change in ROM is seen following a fatiguing protocol in a seated position or in an upright position.

A micro-dilution method for detecting oxytetracycline-resistant bacteria in marine sediments from salmon and mussel aquaculture sites and an urbanized harbour in Atlantic Canada.

A micro-dilution technique with changes in optical density (OD) used to measure bacterial growth over 72 h in culture media containing 0, 5, 10, 20, 40, 80 and 160 microg OTC (oxytetracycline)ml(-1) was applied to determine growth inhibition (GI) in mixed bacterial strains cultured from samples of marine sediments and salmon feed pellets. Growth of control cultures (Aeromonas salmonicida) was inhibited at all OTC concentrations. Some feed pellet samples and under-cage sediments from salmon aquaculture sites in the Bay of Fundy showed GI up to > or = 160 microg OTCml(-1).