What is the difference between isometric core exercises and crunches? First off, isometric (iso meaning same, and metric meaning distance) exercises are those in which the joint angle or muscle length do not change during the movement, or, in other words, the body is held in a non-moving or stable position to help isolate the targeted muscle group. This type of movement is great for improving muscular strength and endurance without placing too much stress on the body.
Crunches are great for core strength and endurance, as well, and isolates the abdominals extremely well, but places unnecessary stress on the neck and back. For most, this is no big deal, and the body can handle the stress, but for some with injuries or general weakness, those movement can cause pain, and even injury.
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