Definitely heard of it. I haven’t had as much time as I like to respond to comments but the most efficient way to say this is that we have not been selecting for characteristics that will create conditions for more dangerous or difficult births in such a concentrated way.

We are selecting for babies and moms who will survive the process of gestation and birth, which has changed in a way more nuanced way (ie we have lost some ways of moving and feeding ourselves which create more dangerous birth conditions, and we have gained a lot of tools that have increased survival of pregnancy and birth). That won’t change the mortality rates of pregnancy and birth in a huge way within a few generations of c sections and other more modern interventions.

I was actually going to include that caveat but I tried to keep it simple. There are so many generations of wisdom in midwifery, and I’m absolutely sure it has made a difference over the generations. I used midwives myself for my births. I wish I could find the article that refuted that our anatomy would’ve changed that much due to interventions that humans use and animals do not.

We’ve only had our current birth interventions for a few generations. That’s not enough generations to make an evolutionary change.

I’m sorry to hear about this but so glad to hear you’re staying active! Weight training has endless benefits across the board and really supports other sports too.

Yeah this is specific to biking! Not activity in general.

There’s a lot of data that supports it. I’m also a nurse with a master’s degree (so, extra research training!) and have seen it in the numbers and it’s glaringly obvious in real life. Anecdotally the people who are sedentary may not be dying but they are miserable af.

I love exercising but I am much less likely to do it if I haven’t slept well, maybe a self perpetuating cycle

It’s a great way to be active! Add in some strength training/balance and you’re golden.