have worked that long for 15 yrs just presumed every body did the same,i train dogs 3 nites a week aswell tue wed thur, only in house abt 1/2 hr then train the dosg from 6.30 till 9.30, if i sit to long my bum hurts lol,then on a weekend i do the dog shows all over uk.if iam not doin dog shows iam renovating house that i let out,