AFAA Personal Trainer Certification Practice Exam 2025 – All-in-One Guide to Master Your Certification!

Increasing resistance in a training program is significant because it helps to achieve muscle overload, which is essential for muscle growth. Muscle overload occurs when the resistance or weight used in a workout exceeds what the muscles are accustomed to, prompting them to adapt and grow stronger. This principle is fundamental to resistance training, as the body responds to increased demands by repairing and thickening muscle fibers, leading to hypertrophy.

When resistance is gradually increased, it forces the muscles to engage more effectively, improving overall strength and promoting gains in muscle size and endurance. Without this progressive overload, the body would plateau, and further improvements would be minimal. This is why structured strength training programs often emphasize the gradual increase of resistance over time, ensuring continued adaptation and progress toward fitness goals.