Understand the Diaphragm.
Wherever we talk of our ‘Core’ we automatically think six-pack abs and obliques. But maybe the most important of all ‘core’ muscles we don’t even think of
..
Your Diaphragm is very important! This is the
primary muscle of respiration. You’re breathing roughly 12-20x per minute, therefore almost 25,000x per day. I don’t care how much of a gym rat someone is, you never biceps curl that much for one muscle .
It’s a muscle-tendon partition that separates your thoracic and abdominal cavity. It almost hangs here in an umbrella
shape, attaching from the bottom of the thoracic cage to the upper lumbar vertebra. It’s so important because dysfunction (due to many reasons) can cause:
Postural Problems (overuse of neck muscles)Low Back Pain (increased shearing forces when weight-lifting)Metabolic Problems (chronic decease in oxygen supply)..
A lot of people simply cannot control their diaphragm properly. They think that they can’t breath if they’re activating their abs and obliques. So try this:
Lie Supine with Hands on StomachTense Up Your Abs like You’re posing for a Beach Picture 
Slowly Inhale Through the Nose, allowing your hands to rise on your stomachSlowly Breath out with pursed lips, through the mouth, while still tending the abs Do 15x.
Congrats! you’re starting to independently control the Diaphragm and your core Stability muscles. By mastering this you can still lift objects without holding your breath looking like the Hulk
