I have a pain on my left lower side of my abdomen during cardio? I am 31 years old, 152 pounds and in pretty good shape. I run and strength train. For the past few runs out of no where my left side is has a stabbing pain. My heart rate is between 130-135 and I am not out of breath. What could this be?
Hellos you mentioned that there is a pain during cardio i.e. pain due to or during exertion, this type of pain may be due to these reasons, This includes.1 Muscle fiber rupture as I have noted that during sports or exercises person usually torn the fiber of muscles. When exertion this aggravates as may be in your case. Diagnosis can be confirmed by M R I of part concerned.2 As you mentioned that pain is in the lower left reason, so this pain may be due to amoebic colitis.  Stool examination will find out amoeba historical.3 Left renal colic may be the another reason of such pain. In my opinion whenever this pain occurs consult a physician and get his opinion because physical examination will find out exact site of pain. Good luck.