New Journey, New Blog?

Tomorrow begins a new journey for me to lose weight, a dear friend will have surgery to remove cancer and start chemo therapy, and many fellow teacher colleagues and students will embark upon a new school year.  My fabulous friend, Nicholas, who has also decided to shrink himself, believes blogging about our endeavors could prove beneficial.  He's probably right; anything to hold yourself accountable helps!  As per my suggestion, we also plan to log our food and exercise daily on MyFitnessPal.com.  I've heard only rave reviews and success stories from friends about this app, several losing 50 pounds or more using it.  Fantastic, right?!  Nicholas lives in Georgia, I live in Texas... This app will allow each of us to see if the other person is (or isn't) doing the work, so you can write them little notes of encouragement or congrats on their accomplishments for the week.  Say you notice they're not exercising enough: "Dude!  Get your butt to the gym!!!  You've got this!  :-)"

MyFitnessPal.com  -  News Feed

Now the question comes in: For this new journey, should I start a separate blog or is it okay to combine personal with business?  Perhaps having both on one platform would encourage me to blog more frequently, which obviously would be a good thing.  What are your thoughts?  Do you enjoy seeing a combination of personal and business posts on the same blog?  Does it increase reader engagement or is it just plain annoying?