Question

specially designed routines before arriving at the space station. such a regimen might include lifting weights, moving heavy objects, doing push - ups and pull - ups, running, and cycling. this constant variation prepares astronauts for all the stresses and challenges they will encounter in space.
once aboard the space station, these men and women need to continue their workouts, this time in little to no gravity. this situation presents some unique challenges, but scientists have developed many innovations to help astronauts stay in good shape. these include special shoes and new types of weight - lifting machines, treadmills, and exercise bikes that all work without gravity. this physical activity is important because it helps address the detrimental effects of zero gravity, such as premature aging and the loss of muscle mass and bone density.
what is the meaning of regimen as used in the passage?
a medical procedure
a healthy recovery
a regular course of action

Explanation:

To determine the meaning of "regimen" in the passage, we analyze the context. The passage says the regimen includes lifting weights, moving heavy objects, doing push - ups/pull - ups, running, and cycling, and it's a specially designed routine for astronauts.

• "A medical procedure" is incorrect because the activities listed are exercise routines, not medical procedures.
• "A healthy recovery" is incorrect as the regimen is for preparation and maintaining health in space, not for recovery.
• "A regular course of action" fits because the listed exercises are a regular set of actions (routine) that astronauts follow.

Answer:

a regular course of action