When friends get together, they often play some challenging games. For example, if both sides keep clicking on a button, the slow one will be bounced in the face by the cake in the middle.
The secret of winning this kind of games is that you can click the button continuously without slowing down. When one party is exhausted, it is easy to lose. Most people can't persist in 30 seconds without slowing down, so 30 seconds training is just right for you, and can help you to suppress your friends.
Note: the effect of one ultra long practice is far better than that of practicing for an appropriate time every day. And if you don't pay attention to rest, it's easy to hurt your fingers.