Bamboo implies a hollow, light material. Rattan is solid - we use it instead of other woods because it's resistant to splintering and breakage. Add to the rattan the weight of thrusting tips, tape, cross (or basket) hilts and you can think a sword as being about the size and weight of a softball bat. Without armor, these weapons are literally deadly. WITH armor, it's not unusual to accumulate some nasty bruises.

It's not as bad as it sounds, though. It is truly one of the most fun activities I've yet encountered... And it IS an excellent way to work out agression!