breaking a glass with fingers
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timdewittbailey — 9 years ago(November 07, 2016 03:41 AM)
It can be done with a bit of specialized training. Squeezing a ball of wax would only build crushing strength. To open the fingers you use the extensor muscles. Check out "expand your hand bands" and similar devices for training those specific muscles- along with extensor exercises you can find easily.