"Exercise" is a word in LAW AND LEGAL, ENGLISH

To make use of. Thus, to exercise a right or power is to do something which it enables the holder to do. U. S. v. Souders, 27 Fed. Cas. 1267; Cleaver v. Comm., 34 Pa. 284; Branch v. Glass works, 96 Ga. 573, 23 S. E. 128

Exertion for the sake of training or improvement whether
physical, intellectual, or moral; practice to acquire skill, knowledge,
virtue, perfectness, grace, etc.

To exert for the sake of training or improvement; to
practice in order to develop; hence, also, to improve by practice; to
discipline, and to use or to for the purpose of training; as, to
exercise arms; to exercise one's self in music; to exercise troops.

To exercise one's self, as under military training; to
drill; to take exercise; to use action or exertion; to practice
gymnastics; as, to exercise for health or amusement.

The performance of an office, a ceremony, or a religious
duty.

To set in action; to cause to act, move, or make
exertion; to give employment to; to put in action habitually or
constantly; to school or train; to exert repeatedly; to busy.

To put in practice; to carry out in action; to perform
the duties of; to use; to employ; to practice; as, to exercise
authority; to exercise an office.

Bodily exertion for the sake of keeping the organs and
functions in a healthy state; hygienic activity; as, to take exercise
on horseback.

To occupy the attention and effort of; to task; to
tax, especially in a painful or vexatious manner; harass; to vex; to
worry or make anxious; to affect; to discipline; as, exercised with
pain.

That which is done for the sake of exercising,
practicing, training, or promoting skill, health, mental, improvement,
moral discipline, etc.; that which is assigned or prescribed for such
ends; hence, a disquisition; a lesson; a task; as, military or naval
exercises; musical exercises; an exercise in composition.

That which gives practice; a trial; a test.

The act of exercising; a setting in action or practicing;
employment in the proper mode of activity; exertion; application; use;
habitual activity; occupation, in general; practice.