I tried the 20-minute Caroline Girvan abs workout — and it's a killer

Be warned — it’ll be the longest 20 minutes of your life

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Forget planks — this 15-minute crunches workout sculpts your abs

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12 Minute 4x4 Abs Workout at Home - No Equipment

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14 months of Caroline Girvan home workouts - arm gains : r/PetiteFitness

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This upper-body dumbbell workout sculpts your shoulders, biceps