ose

4, Select any motor activity which you perform rather frequently. Study
your actions from the standpoint of waste motions and apparent causes of
fatigue if continued. If you perform it efficiently, how do you think you
achieved this? If you perform it inefficiently, how could you go about
improving your efforts? ,

Answer? (as varied as are the individuals answer the question, )

a

5. Discuss briefly why ‘the articulations of the body are the —— upon which
the study of leinesiology swing.
Answer: Movement takes place in the body articulations. They are the loci
of motion - just as the hinges of a door or the din of a wheel are the points
of motion for their respective services. Various types of door hinges result
in different uses for doors. So it is with body uretenaiihhenties the structure
of the articulation will primarily determine its type and range of movement.

6. In mich the same wey as in errs 5, discuss the ne of the muscles
of the body to the study of kinesiology.
kw The muscles of the body are the sources of body motion; just as the
articulations are the places of motion, ‘The articulations would be relatively
useless without the muscular propelling power. Henee, the larger muscles are
located where the greatest force is needed, and the lesser where the least ree
sistance is needed. )

The human body is a self-propelling machine, whose power comes from
muscular contraction. : And it must be remembered that a muscle can only pull;
it never pushes. |
Gravity is a constant foree pulling vertically dowmvard on all objects,

at all times. The mane les are always combatting the dommrard pull of gravity.
Likewise, if and when gravity can yee the desired movement, in the interests
of muscular economy we soon learn to let the miscles relax and let gravity do
the work. | | 3