question: ive had 2 episodes of PE last year, im on warfarin 5 mg since then..but now im starting to gain weight....i also had a lumbar disc collapse that time due to frequent coughing in PE....and back pain still remains, although intensity is decreased.....im myself a mbbs graduate, age 29...please advice me whether can i do at least running for weight loss as i cant do any abs exercise now due to back pain....and should i think in future to stop warfarin as infarcts have now healed in lungs....my thrombophilia screen was negative and venography was also normal....so it was Idiopathic PE...plz advice?