Yeah, I don't think Grok's life was as strenuous as some people would like to believe. There was probably a lot more walking, but the stuff that everybody wants to imagine as being so strenuous and time-consuming probably wasn't. I remember seeing on 60 minutes some hunter-gatherers who lived near the sea. Hungry? Took the guy about 2 minutes to spear a fish. The Indians up in Nor Cal still are allowed to scoop salmon up with nets. All you have to do is stand there at a bottleneck and scoop the fish as they fly up out of the water. I also recently saw a video on a website for a special lightweight fishing pole. To catch a fish took less effort than it takes me to push a cart around a supermarket. Considering that Grok's world probably had way more wildlife than ours, I think that he didn't work as hard as a lot of these guys pumping huge heavy weights and pushing truck tires up hills and such. Here's the fishing video.
Anyway, as an older woman trying to get in shape after a long life of mostly only doing cardio things like hiking, bike riding and jogging, I struggle against my inability to do more. Even just doing body weight exercise, twice a week is plenty. I end up spending 4 days a week sore just from that. I've seen real improvements doing only twice a week. The sprinting, I'd love to do it more than once a week but I'm sore for a few days from the sprinting. So basically I'm sore almost every day. At least it's not always the same body parts that are sore so I can go ahead and do whatever's next up on my schedule.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Heaviest squat: 180 x 2. Heaviest Deadlift: 230 x 2