Defined Core 15-Minute Waistline Workout

The New Year is definitely in full swing! The gym has been much busier lately and buzzing with energized New Year resolutions. (Hence why blog content is coming at ya just once a week this month). I just hope it sticks for more people than it did last year! I think one reason why so many New Year resolutions dwindle by February is because people tend to take on too much too fast. Motivation is going to be at its highest when you take on a new goal. However, within just two to three days, the fatigue and DOMS (delayed onset muscle soreness) will start to kick in and the idea of going back to sweat it out again becomes way less exciting and way more daunting. Slow your roll, lady. Didn’t we all read theΒ Tortoise and the Hare growing up?? Slow and steady wins the race! Want to know how I stay motivated? I was just featured on one of my favorite foodie blogsΒ Physical Kitchness where I share my tips on the topic!

To keep your workouts fresh and combat any mid-month fatigue, I have a NEW workout coming at ya today. It only takes 15 minutes and you can do it anywhere! These are some of my favorite exercises to define your waistline and sculpt your entire core. These exercises are effective! You’re going to want to PIN this routine and keep itΒ in your back pocket. Let’s make it sizzle in the middle! (Think that catchphrase could catch on?? haha)

Defined Core 15 Minute Waistline Workout

Wardrobe courtesy of Lucy Activewear!

Check in with me on Instagram, Facebook, or Twitter with a photo or a status update, type #lifeinspandex in the comment box, and tag me once you complete this workout! I want to know how you like it! So please please share your experience with me. I want to see all your cute, sweaty faces!

You can also comment below!

Health and happiness,


Profile photo of LifeinSpandex

Hi and welcome to Life in Spandex! I'm Emily, a personal trainer who believes there should be no secrets standing in your way to getting fit. I am sharing my knowledge here on this blog in order to help you reach your goals. Fitness should be fun, eating healthy should taste good, and feeling your absolute best is the ultimate goal. Let's get fit together!
  1. […] 8. Defined Core 15-Minute Waistline Workout […]

  2. Definitely gonna try this work out!

    1. Profile photo of LifeinSpandex

      Yay! Let me know how it goes Shenali πŸ™‚

  3. Great modifications!

    Core work…a love hate relationship for me but I know I need it to be a better runner. Uuuggh!

    1. Profile photo of LifeinSpandex

      It’s a love-hate for me too Tamieka!

  4. You look so fab!! I love 15 minute workouts, HIIT baby! Some of the routines from your post are my favorite and I hate them just as much for kicking my b*** πŸ˜‰
    xx, Kusum |

    1. Profile photo of LifeinSpandex

      Wow thank you so much Kusum!!! Making my day :). Can’t wait to show you what else I got up my sleeve!

  5. I need to loop some of these into my weekly workout routines. Thanks for the tips! – katy

    1. Profile photo of LifeinSpandex

      You’re so welcome Katy!

  6. Whew! Side planks are rough, but are so great for the core! I’ve never done twister scissor or pistol crunches, but I will definitely incorporate them into weekly ab routine!


    1. Profile photo of LifeinSpandex

      Let me know how much you love the burn,! πŸ˜‰

  7. I’m so glad I found this post! Such an easy and quick workout. Thanks.

    1. Profile photo of LifeinSpandex

      Yay I’m so happy you did too, Michelle! Hope you come back πŸ™‚

  8. Great workout tips! Can’t wait to use them πŸ™‚

    1. Profile photo of LifeinSpandex

      Get it girl! Let me know how they treat ya πŸ™‚

  9. Great exercises, even for men.

    1. Profile photo of LifeinSpandex

      Yes definitely effective for both genders!

  10. Love those Lucy pants! And so jealous that you’re in the sunshine enjoying nice warm weather πŸ˜‰

    1. Profile photo of LifeinSpandex

      Thanks girl!! Me too! These photos were taken before Christmas. It’s storming here today!

  11. My type of workouts, quick and targeted! Love your hashtags too πŸ™‚

  12. Love this! I’m always looking for workouts for my core.

    1. Profile photo of LifeinSpandex

      Core, you either love it or hate it! Right? lol

  13. oh this will be good!! Thanks for sharing can’t wait to try it!

    1. Profile photo of LifeinSpandex

      You’re so welcome Hannah! Can’t wait to hear how it goes

  14. Thanks for sharing this! I’ve been sick since before nye and I think the worst of it passed so I hope to get back into slowly working out soon (respiratory infection so I get winded easily still πŸ™ )
    I love bicycle crunches they don’t hurt my lower back like traditional ones and I feel more of it worked out.

    1. Profile photo of LifeinSpandex

      I’m so glad you’re feeling better! My rule is, if it’s above the neck, okay to workout. If it’s below the neck, rest!

  15. Thanks for the ideas.

    1. Profile photo of LifeinSpandex

      You’re very welcome!

  16. Awesome work outs!! Thank you so much for this!

    1. Profile photo of LifeinSpandex

      You’re so welcome Julie! Xo

  17. Great core workout. I’ve never tried a Russian Twist.

    1. Profile photo of LifeinSpandex

      They are seriously the best! You’ll feel it in the sides of your waist

  18. Oh the Russian Twist! I have a love hate relationship with the Russian Twist. You have some of the best workouts! I am, of course, going to add this into my workouts!

    1. Profile photo of LifeinSpandex

      Thank you so much Missy! πŸ™‚ they are killer but so good for the waistline

Leave a reply!