A Gastroenterologist and a Physiotherapist have collaborated to produce a book that may be helpful.
One woman in 5 over 40 years of age has constipation.
She has a slow, difficult bowel habit or strains at stool.
"One person in 10 over 40 years of age has incontinence of faeces and or wind. Both of these bowel difficulties may relate to pelvic floor muscle weakness.
Understanding how the gastrointestinal tract works and how our pelvic floor muscles contribute to good bowel (& bladder) function is the first step to tackling these two common problems."

graduated
in Medicine at Melbourne University in 1977. She
obtained her specialist qualification in 1984 and has
been practicing clinical Gastroenterology since that
time. She spent 5 years post graduate study in England
and has been in private practice Toowoomba Queensland
for the past 12 years. She is a member of the Royal
College of Physicians , Australian Gastroenterology
Society and the Continence Foundation of Australia.
Mrs
Shirley Owen graduated in Physiotherapy from the University
of Queensland and obtained postgraduate experience in
Australia, England and Denmark. 
