A combination of factors may be involved. Possible causes of persistent stuttering include: 1  Abnormalities in speech motor control. Some evidence indicates that abnormalities in speech motor control, such as timing, sensory and motor coordination, are implicated.  Genetics. Stuttering tends to run in families.
Do Plank Exercises Work? The plank is an exercise that works the bodyâs core, specifically the abdominal muscles and lower back. The exercise is traditionally performed as part of yoga and Pilates regimens but is effective for anyone looking to improve core strength and balance.
Photo Credit 4774344sean/iStock/Getty Images. 1  The plank, or planking, is an exercise that involves your core muscles, improving your strength, balance and endurance. The exercise is so-named because, when done properly, you straighten your entire body and maintain it rigidly, just like a plank of wood.