Callisthenics vs. Calisthenics

Callisthenics and Calisthenics Definitions
Callisthenics
Variant of calisthenics.
Calisthenics
(used with a pl. verb) Gymnastic exercises designed to develop muscular tone and promote physical well-being
Sit-ups, trunk twists, and other calisthenics are demonstrated on the video.
Callisthenics
Alternative spelling of calisthenics
Calisthenics
(used with a sing. verb) The practice or art of such exercises
Calisthenics is recommended to relax the muscles before a run.
Callisthenics
Light exercise designed to promote general fitness
Calisthenics
(in the plural) Gymnastic exercises under the participation of a (surface-wise) multitude of muscles and often minimal equipment (thus, usually bodyweight exercises) with a stress on stamina.
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Calisthenics
(in the singular) A system of such exercises.
Calisthenics
The science, art, or practice of healthful exercise of the body and limbs, to promote strength, gracefulness, and general fitness; light gymnastics.
Calisthenics
Light exercise designed to promote general fitness