Is there any link between constipation and central chest and back rib soreness? have bad posture but no history or diag. of heart or other issues.

Possibly; ButCareful: Atherosclerosis (known from autopsy data >8 decades) typically begins ~age 7, though typically no artery lumen narrowing (arteries enlarge, http://goo.Gl/arhou2) for decades, thus no symptoms. By 30's into 40's, plaque ruptures ; clots begin producing sudden onset symptoms. Stress tests miss all but very advanced disease. So be careful ; best optimize lipoproteins (not cholesterol), hba1c ; bp.

Possible: Chronic constipation esp in overweight persons may cause gastroesophageal reflux disease (gerd) which could cause heartburn and chest pain. However, it is very important to check with your doctor to rule out actual chest problem or most importantly, a heart problem that could actually be life threatening. If negative, wonder about gallbladder disease, it causes abd distension, chest ; back pains.