To support innovative growth, other planks of the strategy include promoting the attractions of Lombardy's cities and culture. (sciencemag.org)
Some awesome plank variations for you to build a rock - solid, sexy core... and that's just the tip of the iceberg, there are a ton of other plank variations out there. (fitbodyhq.com)
You can intersperse these two exercises between other plank and ab exercises to keep your heart rate up. (cathe.com)