Side Plank
The Side Plank is a fundamental core stability exercise that develops lateral core strength, oblique endurance, and anti-lateral flexion stability through an isometric hold. This exercise is ideal for all fitness levels and provides a safe, effective method for building frontal plane core stability essential for functional movement. The side plank challenges the obliques, quadratus lumborum, and lateral stabilizers while improving core endurance and posture. wwwq
NASM’s evidence-based approach emphasizes side planks during stabilization and endurance phases for building comprehensive core strength. The side plank improves lateral core stability, reduces injury risk, enhances postural control, and translates to improved athletic performance and functional movement quality.
How to Perform a Side Plank
Step 1: Setup
Lie on your side with your body in a straight line from your head to your feet. Stack your feet on top of each other or stagger them for additional stability.
Step 2: Brace/Position
Place your forearm on the ground with your elbow positioned directly under your shoulder. Engage your core by drawing your navel toward your spine and lifting your hips.
Step 3: Execute/Drive
Maintain this elevated position with your hips lifted and your body forming a straight line. Keep your shoulders packed and avoid allowing your hips to sag or rotate.
Step 4: Return/Descent
Lower your hips to the ground once the set duration is complete. Rest and repeat on the opposite side, ensuring bilateral strength development.
Muscles Worked
Primary Muscles:
- Obliquus Externus Abdominis -- primary lateral core stabilizer during side plank hold
- Quadratus Lumborum -- deep lateral stabilizer providing lateral flexion resistance
Secondary Muscles:
- Rectus Abdominis
- Transverse Abdominis
- Lateral Hip Stabilizers
Common Mistakes
- Allowing hips to sag toward the ground, which reduces core engagement and effectiveness
- Allowing the torso to rotate backward or forward, which compromises alignment and stability
- Positioning the elbow too far forward or backward relative to the shoulder
- Holding the breath, which reduces intra-abdominal pressure and core stability
- Progressing duration too quickly without maintaining perfect form and alignment
Variations & Progresssions
As part of NASM's evidence-based approach to movement and strength training, the side plank 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 side plank into individualized programs based on each client's assessment results.
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FAQs
What is the ideal duration for holding a side plank?
Start with 20-30 second holds and progressively increase to 45-60 seconds as your lateral core strength improves. Quality always supersedes duration---a 30-second plank with perfect form is superior to a 60-second plank with compromised mechanics.
How does side plank training improve lateral stability and athletic performance?
Side planks develop the obliques and quadratus lumborum muscles essential for lateral movement, rotational control, and spinal stability. Improved lateral core strength translates to better performance in sports requiring side-to-side movement and change-of-direction activities.
Can side planks be performed daily without overtraining the lateral core?
While side planks are relatively safe, daily performance may not be necessary. Include side planks 2-3 times per week as part of a comprehensive core training program that also emphasizes anti-rotation, extension, and flexion movements.