2. As a personal trainer at Boston Sports Club,
Evan Hoffman draws on an in-depth
knowledge of the body's muscle structure.
Since accepting his first personal training
position, Evan Hoffman has leveraged this
expertise to design abdominal workouts and
other fitness plans.

3. The muscles in the human abdomen perform many
functions. They provide core stability for the body,
facilitate movement of the spine and trunk, and
protect the vital organs. In the center of the
abdomen, the rectus abdominus runs vertically from
the chest to the pelvis. This muscle group consists
of four sections of muscular fiber connected by
tendon bands. Known colloquially as the “abs,”
these muscles control pelvic tilt and lower spine
flexion while providing increased abdominal
pressure when necessary.

4. On either side of the rectus abdominus, the
internal oblique muscle helps to rotate the spine
while contributing to the increase of internal
pressure. Outside of these muscles, the
external obliques direct sideways bends and
torso rotations. These abdominal muscles work
together with the muscles of the back, pelvis,
and legs to direct walking and other gross motor
functions.