What is the primary goal of using manual resistance in an exercise regimen?

Using manual resistance in an exercise regimen primarily aims to enhance strength and endurance. This approach involves a trainer or therapist applying resistance to the movement performed by the individual, which allows for targeted muscle engagement. By adjusting the amount of resistance to match the individual's strength level, this method promotes muscle growth and endurance over time.

When muscles are subjected to external resistance, they respond by adapting, which can lead to increased muscle strength, size, and overall endurance. This technique is particularly effective because it can be modified to accommodate various fitness levels and specific training goals, making it versatile for rehabilitation, athletic training, or general fitness improvement.

The other options do not align with the direct purpose of manual resistance. While immobilizing joints could be a goal in certain therapeutic contexts, it is not the primary objective of manual resistance training. Increasing flexibility might occur as a secondary benefit but is not the main focus. Similarly, while some cardiovascular benefits can result from resistance training, the primary goal is not specifically cardiovascular health but rather to enhance muscular strength and endurance.