Ultimate shoulder rides

I have a female friend I used to date, and I'm still good friends with.  Only see her a couple times a year these days, since I moved away from where she lives. But I weigh about 93kg and she was about 75kg and I used to ride her every time we got together. She used to do martial arts training and was trying to build her strength. We found that if I rode her at least a few times every weekend, her legs got noticeably stronger with bigger, more defined muscles. It used to be really fun to ride her and watch it get easier for her to give the rides with practice. At first, she wouldn't even dare try to carry me up any steps. But she progressed to where every staircase we came to, she'd stop and wait for me to hop on her back, knowing it was a good workout opportunity.

I rode her on all fours sometimes, around her place or mine, but usually piggyback. (The good part about piggyback vs. a shoulder ride is it was a good arm workout for her too, since she had to hold my legs up. And I'd often tell her to boost me up a little higher on her back, making her lift my whole 93kgs. using her arms under my thighs. I don't think she was even focused on building her arm muscles but I knew I could work that into the whole thing, without her even realizing it! In fact, on a couple of those pony rides on all fours, I purposely sat far up on her back, just behind her neck, wrapping my legs around her shoulders, so she had to hold me up using her arms.)  She was surprised when by the end of the summer, I told her to flex her arms and little biceps popped up. But she was definitely proud of them.

She started doing squats with me and one of my buddies, taking turns with us on her back and seeing how many she could do, when we hung out at parties. It was a lot of run riding her for those, but I also enjoyed checking out her leg muscles rippling as she squatted him while wearing shorts. (We told her we both weighed about the same amount, but he was actually heavier than me.)  I told her to try going up on her tip-toes each time she came back up from a squat with him, figuring she might only be able to lift her heels off the ground a little bit with all his weight on her like that. But to my surprise, she got her feet almost vertical, ALL the way up on her toes like a ballet dancer! Her calves were really bulging out. She said, "Ooh... I can really feel that in my legs!" and did her whole set of squats that way. I told her how amazing her calves looked doing it, so other times we got together after that, she gave me some piggybacks around my basement while up on her tip-toes the whole time!

The unfortunate thing is, she hasn't kept up with the martial arts stuff anymore and I don't think she has any friends into riding her and helping build or maintain her muscles like we used to do. So I'm sure she'll still happily piggyback me next time we see each other, but it won't be as impressive as what she used to be able to do.