They looked pretty healthy at the Grammy awards! Just not "let's vamp on Achilles Last Stand for 200 minutes" healthy.

Besides, everyone in Led Zeppelin got little breaks in the middle of the show... Page/Plant/Jones had a good 20 minutes off during Moby Dick and Bonzo got at least 10 to rest during the acoustic set and more during the long guitar solos.

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what do you teach your children about me?
what do you teach your little children about me?
pimp, thug, bling drug lord of the undergrounded kings
how can you be so sure i won't call down the rain?
what do you teach your little children about me?
you point your gun, wait, hide and run. i see it plain