Final answer:
The term overload in a sport conditioning program refers to exercise training that stresses the cardiovascular system and/or skeletal muscles above a level to which it's accustomed.
Step-by-step explanation:
The term overload, when used in conjunction with a sport conditioning program, is defined as exercise training that stresses the cardiovascular system and/or skeletal muscles above a level to which it's accustomed. This means that during a conditioning program, the exercises should be challenging enough to provide stress on the body, but not to the extent of causing injury or damage. It's important to gradually increase the intensity and duration of the exercises to avoid overload injuries.