How to do Diamond push-ups
Begin in a high plank position on your hands and feet. Your hands should be flat on the ground with the thumbs and pointer fingers of each hand touching each other to create a diamond on the ground. You should be on your toes with the feet hip-distance apart. Your gaze should be down at the ground in order to keep the neck in a neutral position.
Draw your belly button toward your spine to engage the core muscles and maintain a straight line from head-to-toe.
Now lower your body toward the floor while keeping the neck and low back in a neutral position. The elbows will bend as the upper arms flare out to about a 45-degree angle away from the torso. Lower down until your chest touches the floor.
Then, press back up as you straighten your arms completely and return to the high plank position.
Repeat for the desired repetitions.