(aviation, space flight) An anti-G technique to increase G-tolerance and reduce G-LOC incidences, that has been described as like straining on the toilet while constipated. The technique has taught in training as visualizing a walnut held between one's buttcheeks, and then trying to crush it.

plural of anti-G straining maneuver

(pathology) injury to muscles and tendons caused by continuous repetitive use of particular muscle groups, especially in one's arms and hands, for example by using a keyboard and/or mouse, playing a musical instrument or working on an assembly line

plural of repetitive strain injury

To make every possible effort to do something; to do one's utmost.

(chemistry) The strain resulting from van der Waals repulsion when two substituents in a molecule approach each other with a distance less than the sum of their van der Waals radii.

So as to strain; with a straining action.