I’m a fitness writer and these are my three favorite workouts by personal trainer Britany Williams

I keep returning to these sessions for arms, core and cardio

Woman exercises with dumbbells in front of a laptop in a living room
(Image credit: Getty Images / Thomas Barwick)

I often only have a short amount of time to squeeze in exercise so when I do an online workout it needs to be quick, effective and fun.

Personal trainer Britany Williams always ticks all three boxes with the workouts she posts on her Instagram account. She often uses compound exercises (working multiple muscle groups at once), allowing you to work your whole body in less time.

Like me, the Sweat coach is a mom to young children so she understands the time constraints parents face.

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Here are three of her workouts I do on repeat.

My favorite Britany Williams workout for arms

This 15-minute arms workout features just three dumbbell exercises—the single-arm shoulder press, single-arm row and skull crusher—ticking off a push, a pull and an isolation move for the triceps on the back of your arms.

This neat little circuit not only works your upper body but also challenges your core. In a kneeling position, your abdominal muscles will work hard to stabilize you, and the skull crusher requires some core strength to raise the weights from overhead.

My favorite Britany Williams workout for no-jumping cardio

Since having children my pelvic floor is not as strong as it used to be and now I’m nearing 50, low-impact cardio is kinder on my knees. This no-jumping cardio workout satisfies my love of HIIT without putting too much stress on my joints.

It’s only four rounds but because there’s no rest between exercises, it keeps your heart rate up and helps to build cardiovascular fitness and strength.

My favorite Britany Williams workout for core strength

The two killer core moves in this workout prove you don’t need crunches to effectively work your core. Both moves—the pullover supine march and the plank to bear—target your deep core muscles. These sit under your superficial abdominals to help support your spine.

Often overlooked, these deeper stabilizing core muscles not only help improve overall core strength and stability, but can improve your posture, lower-back pain and pelvic floor 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, chair-based exercise classes for seniors and MenoFitness classes for perimenopausal women to help build strength and support bone density.

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