(Remember to keep your back flat during the exercise.

(Remember to keep your mouth closed throughout the exercise.)

Keep your back flat and do not let your back or hips sag.

The tourniquet is well accentuated, the back flat and well muscled.

It is very important to maintain the back straight at all times.

The flat-backed tortoise (Natator depressus) belongs to the order of the tortoise.

Now you need to make 10 circular movements of the pelvis, keeping the back straight.

This is why this flatback turtle has no global distribution.

A book and book binding method which yields a book having a flat spine which is easily printed during binding.

The flatback sea turtle (Natator depressus) is a sea turtle that is endemic to the continental shelf of Australia.

The flatback turtle, an endemic Australian species, has made a surprising appearance in Balinese waters.