Straight Line Side Lifts
The straight-line side lift works your core and obliques to blast belly fat and whittle your waist. The secret for better results: Superglue your legs together and move them as one. Watch this video, do 10 reps for each side, and repeat three times.
These moves will work your obliques, which help whittle your waist and give you an hourglass shape
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See the full flat-belly workout