As with any of the other exercises, if you have pain or pinching, stop what you’re doing. Alternatively, you can make it easier with your knees on the ground, which is the base level of the exercise, or, like I’ve done in the video, you can do it lifting your knees off the ground, which adds a little bit to the instability and you’ll see my hips start to rock a bit.

I haven’t been doing these as frequently as I should but just in recording these videos I’m starting to realise I need to get back to doing these on the daily! Go for it and let me know how you get on – I’m excited to see how much stronger you’re going to be in the next 21 days if you keep these movements up.

We’re going to start off with our hands under our shoulders, knees under our hips, tuck the toes and just lift the knees off the ground ever so slightly. Keep strong through the shoulders, keep your belly button pulled back towards your spine, and you’re going to have to shift your weight to allow yourself to lift up that arm.

What you’re doing here is working into the back of the shoulder, but what’s really important is that you don’t allow your tummy to sag down, you keep your belly button pulled up towards the sky.

Essentially what we’re doing here is holding our spine in that strong position, knees are still off the ground. If this gets difficult, pop the knees down. Repeat eight times on each side.

If you have any questions throughout the Challenge, email Fiona or send her a message on Instagram, Facebook and use hashtag #mkt21days to let us know how you are getting on with the Challenge!