I'd second @ertyu's comment about a lack of movement in terms of physiological deficiencies. Even many of those who look fit in US culture are often static throughout the day, working behind screens, and leaning into one form of repetitive type of movement to keep calories in check (running, cycling, peloton, etc..). The discussion reminded me of this quote I had in my journal which I pulled from a Katy Bowman essay a while back, which ties the outsourcing of movement to the pathological culture:
Katy Bowman: Our daily life is composed of a lot of seemingly innocuous ways we've outsourced the body's work. One of the reasons I've begun focusing just as much on non-exercisey movements as I do on exercise-type movements is that I feel that the ten thousand outsourcings a day during the 23/24ths of your time hold the most potential for radical change. Be on the lookout for these things. To avoid the movements necessary to walk around to all the car doors, or just to avoid turning your wrist, or to avoid gathering your tea strainer and dumping the leaves and leaning the strainer (in your dishwasher?), you have accepted a handful of garbage, plastic (future landfill), and a battery. To avoid the simple movements, you have -- without realizing it -- required other humans somewhere else in the world to labor endlessly, destroy ecosystems, and wage war...for your convenience.
Sedentarism îs very much linked to consumerism, materialism, colonialism, and the destruction of the planet. If you're not moving, someone else is moving for you, either directly, or indirectly by making STUFF to make moving not easier on you. You were born into a sedentary culture, so 99.9 percent of your sedentary behaviors are flying under the radar. Start paying attention. What do you see?
I actually think you are probably on point in regards to the sleep and sex observation. I'd probably broaden sex into intimacy though. Self-reported surveys on things like sleep are always a bit dubious in my mind.
The more I thought about this topic, the more I think that people in the US are deficient in most physiological needs. Can we honestly say that a frozen meal with 70 ingredients is actually food? How many households cook most of their meals from scratch? Maybe a better way to phrase it is that we are deficient in nutrients.
Anyway, the sad thing is that we seem to be exporting this culture to other parts of the world.