O núcleo fraco pode causar dor nas costas?

Yes — a weak or poorly coordinated core can be a major contributor to lower back pain, even if you exercise regularly.

Many people train abs for aesthetics (crunches, leg raises) but lack deep core stability — especially activation of the transverse abdominis, multifidus, diaphragm, and glutes. If these muscles don’t coordinate well, the lumbar spine absorbs more load during daily movements like sitting, bending, or lifting. Over time, that creates irritation.

However, core weakness is rarely the only factor. Other common contributors include:

• Tight hip flexors or hamstrings
• Weak glutes
• Poor squat/deadlift mechanics
• Prolonged sitting (even in people who work out)
• Lack of thoracic mobility
• Training imbalance (strong quads, weak posterior chain)

Back pain is often about stability endurance, not brute strength. You may be strong, but unable to maintain neutral spine under fatigue.

If your pain:

• Radiates down the leg
• Causes numbness/tingling
• Worsens at night
• Persists beyond 6–8 weeks

Then evaluation is important.

Otherwise, improving deep core stability (planks, dead bugs, bird dogs, Pallof presses), glute strength, and hip mobility often makes a significant difference.

Lower back pain in active people is usually a coordination problem — not a laziness problem.