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30 Day Plank Challenge of The 1:1 Diet by Cambridge Weight Plan

header challenge 30 days

Summer is here and we want to firm and tone up our tummies for long sunny days on the beach, that’s why we’ve launched our 30 Day plank challenge!


The plank is one of the best exercises that you can do for your core, as it’s simple to do but challenging on the muscles that support your torso and back. By strengthening these muscles, you’ll improve your posture and make most physical tasks easier, with less stress on your spine and firm up those abs too.

However, we know it’s a pretty tough one to master when you’re just starting out, so our ‘30 Day Plank Challenge’ will take you from zero to total planking-pro!

There are a few stages to the plank, from beginner to expert, once you’ve mastered each stage you can level up and repeat the challenge for another 30 days! You can also attempt side planks and Spider-man planks as you get stronger. We’ve got a brilliant printable challenge sheet to keep you on track and below you’ll see how to do each stage, build your strength and tone.

Good luck and don’t forget to share your progress with us by tagging @one2onedietspain in any social posts.


Beginners Plank:

  1. Start off on your knees
  2. Place your hands on the floor, under your shoulders with arms slightly bent
  3. Try to keep your body as straight as possible from knees to shoulders – so keep your butt low (Hint: doing it near a mirror helps)
  4. You may be a bit wobbly but stick with it and you’ll get rock solid
  5. Hold this pose for the times below

(Remember to breathe!)


Intermediate Plank:

  1. Again, we’re on our knees
  2. Place your elbows and forearms on the floor, with elbows directly below your shoulders
  3. Again, keep your body straight and flat
  4. Hold this pose for the times below

(You’re still breathing right?)


Expert Plank:

  1. This time, it’s the bottom of your toes on the floor, not your knees
  2. Hands under shoulders (like the Beginner plank)
  3. Knees, hips, back and shoulders in a straight line
  4. Hold this pose for the times below



Master Plank:

  1. On our toes again
  2. Elbows under your shoulders
  3. You should be in the habit of keeping everything straight by now
  4. Hold this pose for the times below

(Remember to breathe!)



Some people find it harder to do the plank on their hands than elbows – everyone’s different, so adjust accordingly.

There are loads of great videos on YouTube with fantastic plank form tips if you’re not sure you’re doing it right – it’s better to hold a correct plank for a few seconds than 30 seconds with bad form.

Print out our fab plank challenge printable and stick it on your fridge/up in your room to remind you to do the challenge every day. Let’s do this!

You can download the challenge calendar here

calendar challenge 30 days



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