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.
The plank is a static isometric exercise that conditions the stabilizing muscles in your shoulders, abdomen and hips and strengthens your upper and lower body. In contrast to crunches, which only work the abdominals and lower back, the plank develops muscular balance among several core muscle groups.