This trainer says kneeling abs exercises are better for your core and also protect your lower back

Ab work that won’t crush your spine ...
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Forget sit-ups – a fitness expert says these 4 kneeling core exercises are much more effective

Sit-ups have long been a staple in ab workouts, but they fall short when it comes to building well-rounded core strength. It’s not a terrible exercise, but it mainly works the rectus abdominis (the ...