Page 18 - Latter Stage Jeet Kune Do for Beginners

2.3 Sit Ups

Calisthenics for a fighter are exercises designed
chiefly to build up protective muscles in the stomach
and neck, and to make him supple. A fighter should
avoid heavy exercises like weight-lifting, for they
tend to make him muscle-bound.

Bending exercises are best to develop the stomach
muscles into a protective "washboard" against body
blows. It begins with lying with the back on the floor,
typically with the arms across the chest or hands
behind the head and the knees bent in an attempt to
reduce stress on the back muscles and spine, and
then elevating both the upper and
lower vertebrae from the floor until everything
superior to the buttocks is not touching the ground.
Perform 15 repetition for 4 sets. See Picture 3.2c
below

Picture 3.2c Sit Ups

15