Strong inner core leads to a flatter stomach
In order to develop a flat stomach area, training your inner core is a must. The ab plank is an example of a powerful, inner core exercise.
Duration : 0:2:28
[youtube L7mD69MqCiw]
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Cannot tell what …
Cannot tell what you said… ab-plank?
Also, cannot see… the video lighting is very poor.
This would be a good video, if only the audio and the lighting were adequate.