Is it against the law to carry a 6' hunting knife in your backpack during physical training?

i carry it during running to work,any answers would be appreciatedIs it against the law to carry a 6' hunting knife in your backpack during physical training?
Depends on where you are- in packpack , over 2 inchs blade, in town most places would say illegal carry of concealed weapon. Wisconsin state law says open carry of hunting knife during recreational activity is legal, City laws can say illegal for general carry. Other places may say if in pack pack and not readily accessible is a legal 'Transport'. Check local police- you're carrying not accessible during a recreational activity or are you illegally carrying concealed.