The calendar just flipped to 2024, so cue the ads: “Now’s your chance to drop weight, get ripped and let your fitness flag fly!” Gyms fill. Shoppers empty the diet food sections at your grocery store. And good luck finding a rice cake or a free treadmill at the gym before spring. Among the more popular life-change regimens this season is the 75 Hard Challenge. Launched by Andy Frisella in 2019…
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