Unleashing the full potential of your abdominal muscles and achieving that coveted six-pack is no easy feat. For most people, it requires a combination of intense workouts and sustainable fat loss to reveal those sculpted abs.

Fortunately, fitness coach Sophie Van Oostenbrugge has created a rigorous 10-minute ab workout designed to help you build a stronger core and target those stubborn ab muscles. Say goodbye to endless crunches and hello to Oostenbrugge's six-pack challenge, a dynamic routine that will push your limits and set you on the path to achieving a well-defined midsection.

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If you want an exercise that’ll fire up your obliques, get stuck into the bicycle crunches that are included in this workout According to a study published by American Council on Exercise, bicycle crunches were ranked as the most effective ab exercise. To perform one correctly, start by lying on your back with your hands placed lightly behind your head and your knees bent. Lift your upper body off the ground and simultaneously bring your left elbow towards your right knee while extending your left leg straight. Then, switch sides by bringing your right elbow towards your left knee while extending your right leg straight. Continue alternating sides in a cycling motion while engaging your core muscles throughout the exercise. Here’s how to do bicycle crunches with the perfect form, plus what happened when our fitness editor did 100 bicycle crunches a day for a week.

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