Carrie Underwood gave birth to a second baby boy earlier this year but getting back in shape has been tougher this time.

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“I’m going to be honest, ‘bouncing back’ after having Jacob has been much more difficult than after I had Isaiah and I’ve been pretty hard on myself lately,” the country star admitted in an Instagram post on Tuesday.

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I’m going to be honest, “bouncing back” after having Jacob has been much more difficult than after I had Isaiah and I’ve been pretty hard on myself lately. I go into the gym and I can’t run as fast or as far. I can’t lift as much weight or do as many reps as I could a year ago. I just want to feel like myself again…for my body to feel the way that I know it can. As I was working out today, I realized that for the past 11(ish) months, my body has not belonged to me. It was a perfect home for Jacob. And even now it belongs to him every time he drinks his milk. As I prepare for red carpets and for life on tour, right now I make a promise to myself to start appreciating what my body CAN do and stop focusing on what it can’t. I promise to stop analyzing every angle and every curve and every pound and every meal. I’m going to keep staying the path because it is a journey and as long as I’m always working towards my goals, one day I’ll reach them. I’m going to take it day by day, smile at the girl in the mirror, and work out because I love this body and all it has done and will continue to do! #bodyafterbaby #fitmom #healthy #staythepath @caliabycarrie

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Carrie Underwood has the two children with her husband Mike Fisher, whom she married in 2010.