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Thats why I decided to tackle it every day for one week.

I used a 10kg weight to begin with, but more on that later.

a woman�s abs

Heres what happened when I did 70 reps daily for one week, and how my core felt afterward.

Heres how I found this seven-day challenge.

Go with a weight that allows you to keep proper form on both sides no matter the reps. Thats why sit-up variations like these are so popular.

Male athlete performing the Turkish get-up from the floor with left arm holding kettlebell overhead and right arm on floor, sitting up

Plus, its way harder to stabilize a weight using one hand.

Youre practicing acceleration on the way up and controlling deceleration on the way down.

Add load to an already unstable position overhead, and your core muscles have even more to do.

Kettlebell Turkish Sit Ups - YouTube

And boy, I felt this one in my abs and shoulders for days.

How do you know?

Youre looking to keep your biceps and ear in close contact throughout.

a woman doing bicycle crunches on an exercise mat

We all need extra rest at times.

And not much happened, as it turned out.

As a trainer, I highly recommend taking rest days to avoid overtraining the same muscle groups every day.

a photo of a woman doing a side plank

In fact,heres the number of rest days you really need in your exercise routine.

I regularly train at my local CrossFit, so Im used to putting my muscles through the wringer.

Weightlifting demands a strong core to lift safely, no matter your ability.

a photo of a woman with abs sat on an exercise mat holding dumbbells

But its worth noting that after just one week, I saw no physical change.

Six-pack, pending (obviously!)

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