𝗪𝐡𝐲 𝐰𝐨𝐮𝐥𝐝 𝐲𝐨𝐮 𝐰𝐚𝐧𝐭 𝐭𝐨 𝐝𝐨 𝐚 𝐯𝐚𝐜𝐮𝐮𝐦? The abdominal hollow or vacuum are techniques that have been used by bodybuilders for decades and yogis for centuries. In this particular technique, the vacuum is being achieved with the activation of the diaphragm and external intercostal muscles while flaring the ribs. These two muscle groups attempt to take in a “breath” while your airway is closed - the result is a vacuum effect due to the inability of the diaphragm to pull air int

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