Mechanisms of Improving Fecal Continence Muscles Motor Function

Inclusion Criteria:

* Healthy volunteers without past or present history of fecal incontinence
* Patients age 18 years and older with reduced anal resting and or squeeze pressure, reflecting weakness of the anal sphincters who can perform the study

Exclusion Criteria:

* Any one less than 18 years old
* Neurological disorders like dementia, cerebrovascular diseases
* Muscle diseases like muscular dystrophy, myopathies
* Inflammatory bowel disease or celiac disease
* Neuro-muscular junction disorders/myasthenia gravis, Eaton-Lambert syndrome
* Organ prolapse, large rectocele(\>2cm), rectal intussusception
* Hip dysplasia or recent hip surgery and immobile patients.
* Patients with complete normal anal resting and squeeze pressure
* Impaired rectal evacuation (dyssynergy defecation)
* Fecal incontinence completely due to loss of rectal sensation
* Subjects unable to contract their external anal sphincter at all