When you grab a gi in randori/grappling it is common to see competitors grab their opponent’s gi with a grip where their thumb grabs the gi from underneath [or opposite their fingers & palm] like when you normally grab something. |
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While this is a more secure grab it can also entrap the thumb if the uke rolls as is shown in this picture and the next one. |
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A broken thumb [or wrist] is a common injury if the uke rolls out of the throw or rotates during groundwork as your thumb &/or hand can become trapped in the twisted gi. |
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An alternative grip is to keep your thumb next to your fingers & grip only with your fingers. This way you can easily slip your hand out of a twisted gi & prevent injuring yourself. |
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The same problem can occur if you grab your uke’s obi with your thumb underneath. |
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The preventative solution is the same & your technique won’t suffer. |
