for a long time,we had have to mat 50 tatami each lesson in gymnastic hall.
the weight about 11kg per one sheet.then me and teacher have low back pain seriously.finally i claimed to city office,surprisingly they promised us to buy the mats!! goodbye tatami!!
anyway judo,kendo and aikido have been lessening in room softly,although actually true fighting is playing in outdoors.korean didn't have tatami,but their traditional martial arts or royal court arts are playing in room. kuk sool won is very mysterious....they were seemed that they had modern resin mats....
120 sheets mat!! lightly!!