Apollo Has Less Drag The drag a diver must overcome has to be offset by the kick thrust, which comes primarily from the power stroke which was greater in more aerobically economic fins, like Attack and Apollo. Because a kick’s recovery phase provides little thrust and adds to body drag, it has to be compensated for by an increase in kick frequency or thrust. Attack and Apollo were in the power phase of the kick less time (34%) than the fins with less power (39 to 41%). The Apollos produced significantly less drag, because divers kicked deeper with the Attack fins.