You only need two light dumbbells and 15 minutes to strengthen your core, arms and shoulders

Build core strength and stability without a single sit-up

older black woman holding two dumbbells out to her sides at shoulder-height with another woman out of focus in the background.
(Image credit: Getty Images)

If, like me, you're not a huge fan of sit-ups, the good news is there are plenty of other ways to strengthen your abs and deep core. A stronger core supports your spine, reduces back pain, improves balance and stability, and makes everyday tasks easier.

Fitness trainer Danica Osborn has created an eight-move workout designed to build core and upper-body strength.

"You’ll love how these [moves] promote balance, and how they strengthen your core without doing boring crunches from the mat!" she says in her video. Scroll down to see how to do the workout.

How to do the arms and core workout

The circuit features rotational moves, unilateral (one-sided) exercises and dynamic swings, all of which engage the deep-lying core muscles and oblique (side body) muscles to build strength and stability.

Osborn uses light dumbbells (2.5kg/5lbs) and recommends doing each exercise for 45 seconds followed by 15 to 30 seconds of rest. Aim to do two rounds.

How this workout promotes a stronger core

Osborn’s workout combines a range of movement patterns that enhance core stability, balance and mobility. Here's how:

Unilateral exercises

These are moves that work one side of your body at a time. These include the knee repeater and the rainbow press-and-march, which engage stabilizing muscles to improve balance.

Rotational exercises

Moves like the wood chop, squat-and-core twist and the cross crunch involve twisting, training the body to rotate and move well in different directions. They strengthen the obliques and improve functional movement.

Dynamic swings

The dumbbell swing in this workout strengthens the posterior chain—muscles in the back of the body such as the glutes, hamstrings, calves and back. These muscles work together to maintain posture and spinal control as well as enhance movement and overall strength.

Maddy Biddulph

Maddy Biddulph is a journalist specializing in fitness, health and wellbeing content, with 26 years in consumer media working as a writer and editor for some of the bestselling newspapers, magazines and websites in the US and UK, including Marie Claire, The Sunday Times and Women’s Health UK.

She is a CIMPSA-certified PT and works one-on-one with clients, as well as running Circuits Club classes which mixes cardio and strength training and chair-based exercise classes for seniors.