When the honeymoon is over, it's not unusual for newlyweds to notice their waistlines expanding.

A 2011 Ohio State study found that weight gain of about 20 pounds is average among people who get married (especially for women), and according to Texas healthcare professional Judy Gaman, there are lot of good explanations for the increase. In the video above, she explains that after the wedding, lifestyle patterns change, leading to more food consumed and less activity.

One major culprit is television. Gaman said married people tend to watch more T.V., since they're not just watching the shows that they personally want to watch.

"You watch your show, but then you have to sit through your spouse's favorite show, and then you usually have one you watch together," Gaman said.

Moving in with a spouse who is a good cook can also lead to more lavish meals, and the cook will often ask his or her spouse, "Do you want some more?"

"Saying no might be taken as, 'I didn't like the meal,' so they'll continue to eat even after they're full," Gaman said.

Watch the video above for more on weight gain after marriage.

Another recent study found that the quality of your marriage also affects weight gain; couples in happy marriages were found to pack on more pounds than those in unhappy marriages. Fitness magazine recommends being aware of how your eating habits have changed to match your spouse's and to make sure to get a workout in whenever possible.

Read amazing weight loss success stories in the slideshow below.

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  • River BEFORE

    <a href="http://www.huffingtonpost.com/2013/05/17/i-lost-weight-river-jack_n_3163443.html" target="_blank">Read River's story here.</a>

  • River AFTER

    <a href="http://www.huffingtonpost.com/2013/05/17/i-lost-weight-river-jack_n_3163443.html" target="_blank">Read River's story here.</a>

  • Victoria BEFORE

    <a href="http://www.huffingtonpost.com/2013/05/15/i-lost-weight-victoria-york_n_3155351.html" target="_blank">Read Victoria's story here.</a>

  • Victoria AFTER

    <a href="http://www.huffingtonpost.com/2013/05/15/i-lost-weight-victoria-york_n_3155351.html" target="_blank">Read Victoria's story here.</a>

  • Mary BEFORE

    <a href="http://www.huffingtonpost.com/2013/05/13/i-lost-weight-mary-riddle_n_3155621.html" target="_blank">Read Mary's story here.</a>

  • Mary AFTER

    <a href="http://www.huffingtonpost.com/2013/05/13/i-lost-weight-mary-riddle_n_3155621.html" target="_blank">Read Mary's story here.</a>

  • Kristina BEFORE

    <a href="http://www.huffingtonpost.com/2013/05/10/i-lost-weight-kristina-davis_n_3139651.html" target="_blank">Read Kristina's story here.</a>

  • Kristina AFTER

    <a href="http://www.huffingtonpost.com/2013/05/10/i-lost-weight-kristina-davis_n_3139651.html" target="_blank">Read Kristina's story here.</a>

  • Theresa BEFORE

    <a href="http://www.huffingtonpost.com/2013/05/08/i-lost-weight-theresa-borawski_n_3061234.html" target="_blank">Read Theresa's story here.</a>

  • Theresa AFTER

    <a href="http://www.huffingtonpost.com/2013/05/08/i-lost-weight-theresa-borawski_n_3061234.html" target="_blank">Read Theresa's story here.</a>

  • Christian BEFORE

    <a href="http://www.huffingtonpost.com/2013/05/06/i-lost-weight-christian-anthony_n_3056324.html" target="_blank">Read Christian's story here.</a>

  • Christian AFTER

    <a href="http://www.huffingtonpost.com/2013/05/06/i-lost-weight-christian-anthony_n_3056324.html" target="_blank">Read Christian's story here.</a>

  • Katey BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/29/i-lost-weight-katey-dyck_n_2973114.html" target="_blank">Read Katey's story here.</a>

  • Katey AFTER

    <a href="http://www.huffingtonpost.com/2013/04/29/i-lost-weight-katey-dyck_n_2973114.html" target="_blank">Read Katey's story here.</a>

  • Tom BEFORE

    <a href="http://www.huffingtonpost.com/tom-w-watson/weight-loss-success_b_3117782.html" target="_blank">Read Tom's story here.</a>

  • Tom AFTER

    <a href="http://www.huffingtonpost.com/tom-w-watson/weight-loss-success_b_3117782.html" target="_blank">Read Tom's story here.</a>

  • Mandi BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/26/i-lost-weight-mandi-toan_n_2972936.html" target="_blank">Read Mandi's story here.</a>

  • Mandi AFTER

    <a href="http://www.huffingtonpost.com/2013/04/26/i-lost-weight-mandi-toan_n_2972936.html" target="_blank">Read Mandi's story here.</a>

  • Crystal BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/22/i-lost-weight-crystal-english_n_2956353.html" target="_blank">Read Crystal's story here.</a>

  • Crystal AFTER

    <a href="http://www.huffingtonpost.com/2013/04/22/i-lost-weight-crystal-english_n_2956353.html" target="_blank">Read Crystal's story here.</a>

  • Leah BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/19/i-lost-weight-leah-smith_n_2916032.html" target="_blank">Read Leah's story here.</a>

  • Leah AFTER

    <a href="http://www.huffingtonpost.com/2013/04/19/i-lost-weight-leah-smith_n_2916032.html" target="_blank">Read Leah's story here.</a>

  • Vanessa BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/24/i-lost-weight-vanessa-rabb_n_2972663.html" target="_blank">Read Vanessa's story here.</a>

  • Vanessa AFTER

    <a href="http://www.huffingtonpost.com/2013/04/24/i-lost-weight-vanessa-rabb_n_2972663.html" target="_blank">Read Vanessa's story here.</a>

  • Teresa BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/17/i-lost-weight-teresa-kidd_n_2907724.html" target="_blank">Read Teresa's story here.</a>

  • Teresa AFTER

    <a href="http://www.huffingtonpost.com/2013/04/17/i-lost-weight-teresa-kidd_n_2907724.html" target="_blank">Read Teresa's story here.</a>

  • Jenalee BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/15/i-lost-weight-jenalee-hill_n_2902874.html" target="_blank">Read Jenalee's story here.</a>

  • Jenalee AFTER

    <a href="http://www.huffingtonpost.com/2013/04/15/i-lost-weight-jenalee-hill_n_2902874.html" target="_blank">Read Jenalee's story here.</a>

  • Donesha BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/10/i-lost-weight-donesha-bolden_n_2862429.html" target="_blank">Read Donesha's story here.</a>

  • Donesha AFTER

    <a href="http://www.huffingtonpost.com/2013/04/10/i-lost-weight-donesha-bolden_n_2862429.html" target="_blank">Read Donesha's story here.</a>

  • Melody BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/08/i-lost-weight-melody-regnary_n_2823091.html" target="_blank">Read Melody's story here.</a>

  • Melody AFTER

    <a href="http://www.huffingtonpost.com/2013/04/08/i-lost-weight-melody-regnary_n_2823091.html" target="_blank">Read Melody's story here.</a>

  • Courtney BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/05/i-lost-weight-courtney-dyer_n_2819602.html" target="_blank">Read Courtney's story here.</a>

  • Courtney AFTER

    <a href="http://www.huffingtonpost.com/2013/04/05/i-lost-weight-courtney-dyer_n_2819602.html" target="_blank">Read Courtney's story here.</a>

  • Stephen BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/01/i-lost-weight-stephen-mariani_n_2813514.html" target="_blank">Read Stephen's story here.</a>

  • Stephen AFTER

    <a href="http://www.huffingtonpost.com/2013/04/01/i-lost-weight-stephen-mariani_n_2813514.html" target="_blank">Read Stephen's story here.</a>

  • Robin BEFORE

    <a href="http://www.huffingtonpost.com/robin-hoffman/weight-loss-success_b_2910620.html" target="_blank">Read Robin's story here.</a>

  • Robin AFTER

    <a href="http://www.huffingtonpost.com/robin-hoffman/weight-loss-success_b_2910620.html" target="_blank">Read Robin's story here.</a>

  • Benjamin BEFORE

    <a href="http://www.huffingtonpost.com/2013/04/03/i-lost-weight-benjamin-gerhardt_n_2819453.html" target="_blank">Read Benjamin's story here.</a>

  • Benjamin AFTER

    <a href="http://www.huffingtonpost.com/2013/04/03/i-lost-weight-benjamin-gerhardt_n_2819453.html" target="_blank">Read Benjamin's story here.</a>

  • Janne BEFORE

    <a href="http://www.huffingtonpost.com/2013/03/27/i-lost-weight-janne-mcneill_n_2916306.html" target="_blank">Read Janne's story here.</a>

  • Janne AFTER

    <a href="http://www.huffingtonpost.com/2013/03/27/i-lost-weight-janne-mcneill_n_2916306.html" target="_blank">Read Janne's story here.</a>

  • Brittney BEFORE

    <a href="http://www.huffingtonpost.com/2013/03/22/i-lost-weight-brittney-s-wheeler_n_2792300.html" target="_blank">Read Brittney's story here.</a>

  • Brittney AFTER

    <a href="http://www.huffingtonpost.com/2013/03/22/i-lost-weight-brittney-s-wheeler_n_2792300.html" target="_blank">Read Brittney's story here.</a>

  • Megan BEFORE

    <a href="http://www.huffingtonpost.com/2013/03/25/i-lost-weight-megan-cooper_n_2813268.html" target="_blank">Read Megan's story here.</a>

  • Megan AFTER

    <a href="http://www.huffingtonpost.com/2013/03/25/i-lost-weight-megan-cooper_n_2813268.html" target="_blank">Read Megan's story here.</a>

  • Clara BEFORE

    <a href="http://www.huffingtonpost.com/2013/03/18/i-lost-weight-clara-osborn_n_2765912.html" target="_blank">Read Clara's story here.</a>

  • Clara AFTER

    <a href="http://www.huffingtonpost.com/2013/03/18/i-lost-weight-clara-osborn_n_2765912.html" target="_blank">Read Clara's story here.</a>

  • Lee BEFORE

    <a href="http://www.huffingtonpost.com/2013/03/15/i-lost-weight-dr-lee-coleman-jr_n_2765622.html" target="_blank">Read Lee's story here.</a>

  • Lee AFTER

    <a href="http://www.huffingtonpost.com/2013/03/15/i-lost-weight-dr-lee-coleman-jr_n_2765622.html" target="_blank">Read Lee's story here.</a>

  • Debbie BEFORE

    <a href="http://www.huffingtonpost.com/2013/03/20/i-lost-weight-debbie-lazinsky_n_2768877.html" target="_blank">Read Debbie's story here.</a>

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