Kabaddi players rub their hands wit the soil before the game starts. This is so because, soil is a very rough material. It is applied on the hands to increase friction and to get a better grip on their opponents.
Utkal Keshari answered this
This is beacause when we rub our hands with the soil then they will get grip on their opponents.
Koulick Sadhu answered this
Kabaddi players rub their hands on the soil because it increases friction in our hands which provides a better grip in our hands so that the hands do no slip.