Original Resolution: 220x220 Https Encrypted Tbn0 Gstatic Com Images Q Tbn And9gct4 Spgvsio1n7zf1edx3ukvfhot2t25cdxza Usqp Cau Fire hydrant is a pilates exercise that primarily targets the glutes and to a lesser degree also targets the groin, hip flexors, lower back and outer thighs.