When you're competing, you're not just gripping harder — you're bracing harder across your entire upper body. The stress response tightens everything: shoulders, neck, jaw, and yes, forearms. Your muscles are working at 130–150% of their training output even when you're not consciously squeezing.
This means the grip capacity that held for four rounds in the gym breaks down in two at a tournament. The physiological stress that competition generates isn't something you can replicate in sparring — but you can build enough reserve capacity to absorb it.
That's exactly what bilateral grip training creates. When both sides of the forearm are developed, the system has redundancy. When the flexors fatigue, the extensors compensate. When adrenaline compresses your grip budget by 50%, you've built a budget large enough to survive it.