The OP said 'toned' arms, NOT big arms. I know that if youre trying to get big you dont wanna be working the same muscle groups day in day out, but look at the fittest guys out there - Boxers - who train every day ,and in that time are constantly beasting their triceps (amongst however many other muscles). Do you see them with 'shrivelled up' arms?
No. I'll give you another example. I was out in thailand this summer for a month at a muay thai and MMA camp, training every day. Everybody was doing upwards of 400 pressups daily, six days a week on top of 4 hours training. Did any of us 'shrivel up'? No, the people i saw there were in the best shape i've ever seen people in, except a couple of guys i knew who competed in ironman triathlons. And for the record, i am one of those guys who have been 'doing this for years', 8 years to be precise. Anything else?