rigid

Lift your feet off the floor and hold your body in a rigid half-plank, with a straight line from your knees to your head.

You rigidly avoid any food you deem to be “unhealthy,” such as those containing fat, preservatives, additives or animal products.

One of the admirable things about Secretary of State John Kerry being his rigidly logical mind.

A column of wildebeest cantered rigidly in the other direction—all spindly legs, candyfloss white beards, and sloping backs.

Their voices amplified by PA systems, the protests' leaders exhort their audiences with rigidly ideological slogans.

High-minded pursuits dovetail with rigidly disciplining your body.

Tony, less self-centred, less rigidly contained, had penetrated her by an understanding sympathy greater than his own.

Every movement rigidly prescribed, arms held rigid and sharply bent at the elbows.

The voice that had been held rigidly to the usual calm clarity of an official announcer became suddenly high-pitched and vibrant.

A fixed time-table was imposed, to be rigidly observed by all classes of paupers, in all workhouses, at all seasons of the year.

Her hand clasped the back of the seat rigidly, as if she were holding something down.