AAAI-ISMA Personal Trainer Certification Practice Test

This question focuses on how resistance training is defined by the way movement and resistance interact. The type that uses free weights or machines to move through a range of motion involves external resistance while the limb travels through the joints’ full range. In this approach the muscle changes length as you lift and lower, producing concentric and eccentric actions with the joint moving through the motion. Free weights and machines provide that external load and let you move through the ROM. Isometric training, on the other hand, involves muscle contraction without any joint movement. Isokinetic training uses equipment to keep the movement at a constant speed, with resistance that adjusts to maintain that speed. Plyometric training emphasizes explosive, rapid movements that exploit the stretch-shortening cycle to build power, not just controlled movement with a constant load through a range of motion.