The best way to squat to focus on the glutes is to take a very wide stance. Italian researchers found that when subjects moved from a hip-width stance to a stance about double hip width, muscle activity of the glutes increased by more than 40%. So to really build rock-hard round glutes, start with wide-stance squats while your body is strongest.
Wave Maker Facing pool wall in chest-deep water, hold on to edge of pool deck with left hand and place right palm, fingers pointing down, against wall just below water line for stability. Extend legs behind you at water level with both feet and knees together, then kick like a dolphin: Initiate the motion with abs and hips and transfer it through thighs to knees and finally to feet. Kick as hard and as fast as you can for 30 seconds, trying to make the biggest waves possible.