Diamond pushups are a variation of the traditional pushup that emphasizes the triceps and inner chest. To perform a diamond pushup, start in a plank position with your hands placed close together under your chest, forming a diamond shape with your thumbs and index fingers. Keep your body straight from head to heels, and lower yourself down by bending your elbows, keeping them close to your body. Push back up to the starting position, ensuring that your core remains engaged throughout the movement. This exercise not only builds upper body strength but also improves stability and control.