PLANK HOLD TRACKER
Track your forearm plank hold time and compare against Dr Stuart McGill's spine stability benchmarks. Build anterior core endurance safely.
Isometric hold
30–60s solid baseline
McGill optimal ceiling
15s to 60s benchmark
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Frequently Asked Questions
Why is isometric core endurance better than sit-ups for adults 45+?
Dr Stuart McGill's spine biomechanics research demonstrates that repeated spinal flexion during sit-ups causes cumulative lumbar disc delamination, whereas planks train the core to resist motion and protect the lumbar spine.
Is holding a plank for 3 or 5 minutes necessary?
No. McGill's clinical data shows that core endurance plateaus in functional benefit after 60 to 90 seconds. Multiple short, high-tension 20–30 second holds offer superior spine protection without excessive fatigue.
What are the key form checkpoints?
Keep elbows directly below shoulders, squeeze glutes, pull belly button inward, and maintain a straight line from ears to ankles without sagging lower back.
Build Joint-Safe Strength & Functional Longevity
Functional mobility scores and clinical benchmarks reveal where your body needs support. Coach Sharm designs joint-safe strength protocols for adults 45 and older: