I'm not really sure I'm pretty sure it is
Ihad miscarriage in december 2011... After that i use to do proper work out... 100-150 crunches a day... On my 6th month i was pg... I m 27wks no problem... As matter of fact after loosing weight i conceived much quickly... However u should consult ur doctor before starting trying n working out at the same time...
If you're already a runner/jogger then don't worry. I got pregnant when my husband and I were vacationing and did activities like hiking, swimming, zipline, running, etc. Don't worry too much! Just keep track of your cycle and have plenty of sex during your fertile period.