Experiments in these gymnasiums found that after men were allowed to carry bags containing18kg of sand on their shoulders for several months, their weight was not only controlled, but also their muscles became strong, which was better than other sports equipment.
In military physical training, carrying sandbags is a sport that lasts for several years. The action of carrying sandbags makes men have to bear the weight and concentrate on the heavy objects on their shoulders. Tom, the coach of an American fitness club called Outdoor Extreme? Matthews said. In addition, you can also hold sandbags with your hands, which can also exercise the muscles of your shoulders, chest and arms.