Jovan Abernathy is an international marathoner and owner of Houston Tourism Gym. To claim your free tour, contact her at info@tourismgymhtx.com. Follow her on Twitter @jovanabernathy. Instagram @TourismGymHtx. Facebook @TourismGymHtx

While I was training for the Honolulu Marathon in 2009, I learned something very important. I was running late for training, but I needed something in my stomach. I had run out of bananas and did not have time to make some eggs and toast. I opened my refrigerator and grabbed the first thing that was close enough: a plum. It was juicy and delicious. I forgot one thing: that a plum is an unripe prune. Everything was great until about mile 15. I started to get that call. You know the one that says get to the bathroom fast. All I could see is a port-o-let. I didn't want to, but I had too. Of course, there was no toilet paper or soap or sanitizer. Gross! If you think that is bad, read on for the grossest things about running a marathon.

Snotty nose.

As you can imagine, running against the wind and in the cold can cause your nose to run. This is always a gross thing because most of the time, you do not have tissue. Most runners just let it fly off with the wind. It is really fun to talk to someone after their run when they have an "eagle" in the sky. This time, it is okay to refuse the handshake.

Bloody nipples.

This disgusting aspect of running typically only plagues men. Thanks to the sports bra, ladies usually don't deal with this. Bloody nipples happen when the runner's shirt chafes his nipples. After 26.2 miles, his chest looks like the Texas Chainsaw Massacre. If this happens to you, you are not alone. There is a wonderful product called Body Glide to help prevent the carnage.

Urinating on the course.

Maybe you had a time goal and stopping to use the port-o-potty would slow you down or you just could not hold it. There is a reason at the expo that they sell bladder pads for the ladies. Elite runner, Paula Radcliffe, professional marathoner from England has had her instances. In the 2005 marathon, she had to relieve herself in the street on course in front of cameras and reporters. She quickly recovered from the embarrassment because she won.

Pooping on yourself.

Urinating is one thing, but pooping is quite another. I was able to find a port-o-potty in time, but what if you can't? Many runners have had to do the doo on course. This marathon olympian could not wait until he crossed the finish line. Good news for him. He did take the lead and won the race.

Please take heed to my warnings, but don't let that keep your from trying and running a marathon. Invest in Body Glide, bladder pads for the active, and a small bag of keener. As far as the pooping, I always pack Imodium AD. It really works!