Final answer:
Calisthenics is the type of training that uses body weight as resistance. It includes exercises like push-ups and squats, and it is beneficial for improving muscular strength and endurance. Isotonics and Variability Training are different forms of exercise.
Step-by-step explanation:
The type of training that involves using your body weight or a portion of your body weight to carry out resistance training is known as Calisthenics. Calisthenics exercises use gravity and body weight leverage to challenge your fitness level. Examples of calisthenic exercises include push-ups, pull-ups, and squats. These exercises are effective for improving muscular strength and endurance. Isotonics refers to exercises that involve a full range of motion, usually with added weights. Variability Training, on the other hand, involves changing up your exercise routine to provide different stimuli to the body, and does not necessarily focus on using body weight as resistance.