Get a core to die for: Days 1-7

Want to focus on your core this December? PumpUp member @sandrafitness has put together daily routines that you can do to strengthen your abs right before you go to sleep. We’ve created a summary of Days 1-7 below. Check out the full challenge on her blog

I’ve prepared a simple challenge that will strengthen your core for the rest of December until the 6th of January, the time when Christmas festivities finish here in Spain. You can perform these exercises right before bedtime or a couple of hours before going to bed. The challenge is meant to supplement your workouts, rather than substitute for your workouts.

Remember that none of this will work if you do not pair this challenge with healthy eating habits. To get better results, add cardio! It will help your abs to look more visible and defined by burning fat around your core.I’m sure this isn’t news to you, so let’s get to what is really interesting:


  • 20×3 reverse crunches.
  • 20×3 leg raises.
  • 20×3 russian twists.
  • 20×3 heel touches.

You should feel like your core is on fire. Otherwise, you probably already have abs of steel.  See? It took so little time and results will be visible after the challenge!! 


  • 40 bicycle crunches (one on each side)
  • 25 russian twists
  • 25 leg raises 

Repeat 2-3 more times.


  • 30 russian twists
  • 25 heel touches
  • 30 leg raises
  • 20 legs in, and out. Try to keep them as low as you can.

Repeat 2 more times.  

We’ll be increasing the number of repetitions daily, but please listen to your body and do what’s right for you. If you are in pain, the kind of pain that isn’t normal, stop doing the exercise and consult your physician. I don’t want you to get injured. Maintaining proper form is crucial. Believe me, I learnt this the hard way, when crunches gave me a really bad neck pain for a whole week.


  • 45 bicycle crunches
  • 35 russian twists
  • 35 reverse crunches
  • 35 leg raises

Repeat x2/3 depending on how you feel. 


Repeat day 4’s exercises, because we’ll be doing more variations next week and I love performing these exercises rather than sit ups or crunches. We will be increasing the intensity over the next couple of days and that will be a real challenge for you.  Consider these exercises as a warm up for the whole month.


  • 35 heel touches
  • 30 ‘in and outs’: Sitting on a chair or on the floor, keep your stomach tight and push your legs out and then back in. Focus on proper form rather than speed.
  • 1 minute plank
  • 35 russian twists

Repeat x2/3


  • 25 russian twists
  • 25 heel touches
  • 25 in and outs
  • 25 toe touches
  • 1 minute plank
  • 25 bicycle crunches

Repeat 2-3 times.

Check out the full challenge on Sandra’s blog and find her on the app using the hashtag #ACoreToDieFor and tag her username, @sandrafitness