Muscular endurance may be defined as the ability of muscle to perform a specific actions for long time. Muscular strength may be defined as the ability of muscle to exert a resistance.
Muscular strength and endurance can be improved by doing exercise. The push ups can increase both the muscle endurance and strength and increases the ability of muscle to increase its fitness.
Answer: a yoga instructor should treat the students with care and respect, respecting the students boundaries. They should interact with the student with a calm manner, and not a censored content (18+ content) way.