But these days, you're more likely to find him training with booty bands than Thor's hammer, his personal trainer told Business Insider. Recently, Hemsworth has become a fan of so-called "booty bands," elastic resistance bands placed around the ankles or thighs to help fire up the glutes. AdvertisementZocchi said the warmup helps Hemsworth protect his lower back on leg day — and is surprisingly spicy. "It's slowing things down a bit and really trying to focus on that muscle-mind connection as well," Zocchi said. AdvertisementSwap machines for sleds, farmer carries, and walking lungesFunctional strength is better for longevity than Marvel-movie muscle, Zocchi explained.

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