The name internal obliques refers to the location and shape of the muscle.
Internal means inside.
Oblique comes from the Latin word obliquus which means a slanting orientation.
The slanting direction refers to the direction of the fibers of this muscle. The fiber direction of the internal obliques is in the direction of reaching across your body. As in, if you place your hand on the opposite side of your abdomen, your fingers represent the direction of the fibers.
The name external obliques also refers to the location and shape of the muscle.
External means outside.
Oblique, as we just said, means a slanting orientation and refers to the muscle fiber direction.
The fiber direction of these muscles is like the direction of reaching into your pockets.
The obliques are one of the muscle groups within the abdominal muscles. Abdominal strain, including oblique muscle strain, is common among active people and athletes since the muscles are constantly engaged. Keeping them engaged allows the athlete to tighten their core and improve performance while executing skills with the entire body.
If you notice oblique muscle strain, you should work to treat the symptoms as soon as possible. If left untreated, it may worsen or become chronic.