Your legs become stronger and more muscular, but are they thicker or slimmer? Perhaps it dependes on the swimming style as well as different parts of the leg, e.g. thigh versus calf? It will be interesting to hear what real results long time swimmers have got, rather than conjectures.:D
Swimming made my legs bigger, definitely. But I had been running previously. I do a boatload of kicking and use fins though. That really strengthens the legs.
Swimming made my legs bigger, definitely. But I had been running previously. I do a boatload of kicking and use fins though. That really strengthens the legs.