I don't think you want the ScubaPro GoSport as I have WEAK legs..WEAK back and I can use them just fine...they are pretty flexible to meI’m looking for powerful fins between the gopro sport and the regular apek rk3. The go sport is lighter and better for travel but are they more floppy than the rk3 or are they comparable . I have aqualung express fins and looking for something comparable ..: go sport or rk3 work? . Thanks for all the help