It definitely seems likely that physical activity is beneficial. I'd be curious to see studies comparing something like running vs. boxing. (Also weightlifting

It definitely seems likely that physical activity is beneficial. I'd be curious to see studies comparing something like running vs. boxing. (Also weightlifting vs. cardio, or springs vs. long-distance.) Additionally, one thing that's often obscured in studies (or the reporting thereof) is that different people are different. Studies say that running doesn't help people lose weight, but that's looking for significant effects across a population. For some individuals, it does. The concept of "ymmv" is incredibly important when you care about individual impacts.