Clyde1820

I'd suggest that, in general, longer stints of higher-cardio exercise involving the legs can help. Jogging on the flats at a good clip, for example; zippy rides on the flats for long periods. Even swimming, which is higher cardio but won't unduly demand much strength from the legs.

Strength exercises can help, as well, but leaning toward the higher-rep / lower-weight end of the spectrum.

Of course, everyone's genetics differ. What might trim me up might make your own leg muscles get more muscular. You'll have to toy with what seems to work best for you. But I'd try ~6mos+ of higher-cardio, higher-cadence, longer sessions. Then see how it goes.