Thinking that how busy you are as a child impacts your activity level as an adult

[Imthedoctors]

This anecdotal but I'm wondering if anyone else thinks the same.

As a child I didn't do much in the way of hobbies, brownies was if really. At home I liked to colour and play with dolls and read.
As an adult I really value my down time, be it reading or watching tv I need time to just do "nothing". I need 9 hours sleep minimum. I'm now 32, I have a 3 year old and she goes to nursery and a swim class. We spend lots of time at home just playing, relaxing.

I have a friend I grew up with. As a child she was always busy, sports, instruments, she did camps in the holidays and activities most nights and weekend days. When we went to her house she never wanted to play with dolls she wanted to pretend our bikes were horses or play on the swings. She'd always be doing something as a teen, went to the library before and after school basically every day to study, went to sports training and competitions. Had a part time job before any of the rest of us.
As an adult she's much the same, she did an insane gap year which I wouldn't have had the energy (mental or physical) for. She worked part time at uni, and played sport, socialised loads. Never seemed to be doing nothing.
We were worried in lockdown that she wouldn't cope as she was always busy, but no she trained for a marathon, took up gardening and cooking , did online courses in the most random things. She never seems to have a PJ day. Never asleep before 11 and always up before 6 but never tired.
Now she's the same, her DD is younger than mine but goes to baby ballet, swimming and gymnastics. On the weekends they are always out somewhere, a museum or similar. They do holidays that are packed, never poolside.

My friends who didn't do much as kids seem more like me and those who did more are closer to my friend, though maybe not as extreme.

AIBU to think there is some correlation? Is there an ideal middle ground? Which are you and what was your childhood like?

Based on my two kids I think it's just personality. When DS was a toddler we did one or two activities a week, anything else seemed to overwhelm him and interrupting his nap was an absolute no. He did half days in nursery and still seemed overwhelmed. As he got older he did athletics twice a week and that was plenty for him.

DD then came along and was the total opposite. The first difference was she screamed leaving nursery so she did some full days. Then by primary school she just did swimming and dance. It became an apparent before her 5th birthday that she was a happier more content child when she had activities to do. She was always bright as well so homework was a breeze.
She did tennis, dance, swimming, and then dabbled in various other things, gymnastics, karate and athletics. All matched with Piano throughout. At home she was always outside, on the trampoline, going round the block on her bike, she had a skateboard at one point and roller blades another.

As adults DS is very placid, he hasn't moved far, doesn't like to be busy.

On the flip side, DD is always busy, she's been to over 100 countries, lived abroad, hiked, backpacked. Has 2 masters degrees and thinks pool holidays sound like a nightmare.

It's all personality in my opinion.