Isometric training means doing exercises where you push or pull against something without moving your muscles much. It helps to make your muscles stronger and build stamina. Full definition
The easiest way to understand how these factors drive the differences in adaptations between full range of motion training and partial range of motion training, is to look at isometric training at either short or long muscle lengths. (strengthandconditioningresearch.com)
Overall, there is a slightly different pattern of joint angle - specific strength gains after isometric training with either short or long muscle lengths. (strengthandconditioningresearch.com)
Multiple studies have confirmed the effectiveness of isometric training for mass goals, proving that iso - holds recruit the largest motor units and help increase the neural drive between the motor cortex in the brain and the trained muscle, or what you know as the «mind - muscle connection». (fitnessandpower.com)