More ideas from Yulia
The Rock-Solid-Abs Workout - Abs Workout,The plank is one of the best exercises for a flat, toned stomach because it works all the muscles in your core, including the rectus abdominus

The Rock-Solid-Abs Workout - Abs Workout,The plank is one of the best exercises for a flat, toned stomach because it works all the muscles in your core, including the rectus abdominus. - Abs and cardio at the same time?