dont you think that ziz uses her magic to make herself bulkier, that would be cheating and ziz loves that all her gains be 100% natural, is not her fault that she can make anything become real such as creating new materials just for her own use, such as Zizalium a metal so dense a coin made out of it would weight as much as a planet, at that point is only your fault that you cant lift it up!

Sure you can try to keep pase with her with normal weights, but her routine include excersice sets of a million repetitions as a minimun, just as a warm-up, you say there isnt enought time to do a hundred set of a million repetitions on a day? oh well maybe in your day there isnt, but ziz can do anything she wants, so if she says that her day has a lot more time it just does! after all having control of all of reality has its perks, and after all changing things like that dosent hurt anyone so why not enjoy it? after all the wider she gets means bigger and better hugs for everyone!

She even holds up, since she could just pause reality for who knows how long to just excersice endlessly, but then who she could hug? or give pats or do gifts over all eternity?
and where would be the tines to surprise with a ever widening view?