Plank
The Plank is a fundamental isometric core stability exercise that builds anti-extension strength and postural endurance without flexion demands. This timeless movement is ideal for all fitness levels and provides a safe, effective foundation for core training programs. The plank challenges the entire core musculature, including rectus abdominis, transverse abdominis, and deep stabilizer muscles essential for functional movement.
NASM’sevidence-based approach emphasizes planks during the stabilization endurance phase for improving muscular endurance and postural control. The plank improves core stability, reduces lower back pain risk, enhances postural control, and translates to improved functional movement quality and athletic performance.
How to A Perform Plank
Step 1: Setup
Begin in a prone position with forearms on the ground and elbows positioned directly under your shoulders. Position your feet hip-width apart.
Step 2: Brace/Position
Engage your core by drawing your navel toward your spine. Create a straight line from your head to heels by maintaining a neutral spine and avoiding hip drop or lumbar extension.
Step 3: Execute/Drive
Hold this position while maintaining continuous core engagement and proper breathing. Keep your shoulders packed and your gaze slightly forward to maintain neutral spine alignment.
Step 4: Return/Descent
Lower your body to the ground once the set duration is complete. Rest and prepare for additional sets if performing multiple repetitions.
Muscles Worked
Primary Muscles:
- Rectus Abdominis -- primary core stabilizer resisting spinal extension
- Transverse Abdominis -- deep core muscle providing spinal stability
Secondary Muscles:
- Obliques
- Erector Spinae
- Serratus Anterior
- Shoulder Stabilizers
Common Mistakes
- Allowing hips to sag toward the ground, indicating core disengagement
- Maintaining excessive lumbar extension or anterior pelvic tilt
- Positioning elbows too far forward or backward relative to shoulders
- Holding the breath, which reduces intra-abdominal pressure and core stability
- Progressing duration too quickly without maintaining perfect form
Plank Variations
As part of NASM’s evidence-based approach to movement and strength training, the barbell deadlift reinforces proper movement mechanics essential to long-term performance and injury prevention. NASM-certified personal trainers use the Optimum Performance Training (OPT) model to integrate exercises like the barbell deadlift into individualized programs based on each client’s assessment results.
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FAQs
What is the ideal duration for holding a plank?
Start with 20-30 second holds and progressively increase to 60 seconds or longer as core strength improves. Quality always supersedes duration---a 30-second perfect plank is superior to a 60-second plank with compromised mechanics.
How does planking improve functional strength and daily movement?
Improved core stability from planking translates to better posture, reduced lower back pain, and improved functional movement in daily activities. Strong core stabilizers support proper movement mechanics in functional exercises and sports.
Can planks be performed daily without overtraining?
While planks are relatively safe, daily performance may not be necessary. Include planks 2-3 times per week as part of a comprehensive core training program emphasizing multiple planes of motion and movement patterns.