He said this as he tossed the sandbags in both hands upward, and when the sandbags fell, he grabbed one with each hand and continuously repeated the action.
The sandbags weighed over ten kilograms each. Throwing them required significant wrist strength. As they fell with kinetic energy, firm gripping required strong finger strength, and the grip had to be precisely right. Otherwise, it was difficult to muster the strength to throw them again. Thus, this method could train the accuracy, wrist strength, and finger strength of the hands.
After throwing the sandbags for a while, Gao Jianping stopped, then took out two chained spheres from the corner. The spheres were small enough to fit one in each hand.
"These are also for training finger strength, and they train arm strength as well."
Gao Jianping took the spheres and walked over to a horizontal bar. He secured the end of the chain to the bar and then grabbed the spheres with both hands to start doing pull-ups.
