Runners have lean physiques due to atrophy in the upper body and often an accompanying premature ageing of the face. Swimmers do build upper body muscles, but not without much time-consuming training. I’d recommend doing super-slow resistance weight training, which builds specific muscle fibers that enhance whole-body mitochondrial energy burning/metabolic boosting and only requires 1-2 workouts per week of 20 minutes each!
It’s whole body muscle health you want to develop for whole body joint protection and metabolic force!
For more on that see the book Body By Science by keto physician Doug McGuff MD, and also The Slow Burn Fitness Revolution by Fred Hahn and the LCHF/keto physicians Mary Dan Eades MD and Michael Eades MD.
Give it time - as in seasons not weeks. Keto restores muscles in the upper body and legs and recomposes fat through a water cycle every few months (depending on your age and hormonal state and gut health).
70% of women are pear-shaped - yet the actual composition of the majestic pear can vary wildly
depending on visceral fat and metabolic health. For myself as a non-obese and metabolically rather healthy pear gal, have lost significant fat in the upper hips (2 inches) and lower hips (4-5inches) and thighs (about 2 inches each) that I truly was not expecting to lose! Meanwhile, I have leg quad muscles that are easier to find lol. So, am now more a Concorde Pear rather than a Bosc Pear.
The body prioritizes recomposition according to the most urgent health needs at hand. It’ll work on hidden visceral fat wrapped around organs and stored in the ab cavity long before it works on more cosmetic areas like pear reserves. The stronger your digestion & assimilation/synthesis is the better. Ginger supplementation has been a good ally for me to reduce cortisol and allow the belly area to start to recompose long before it typically does with keto. If you use the search bar there are lots of past posts on Ginger. I’m now down to only 1 capsule per day or less, due to my GI health.