Nailing proper pushup form not only challenges your arm muscles but also calls for engagement in your core and glutes, making your body a united front as your push through the movement. While it is inherently challenging, fitness instructor Mindy Lai walks us through the best way to ace your pushups and build strength (plus, some modifications to help along the way). Keeping your spine straight and your eyes trained to the floor between your hands will also ensure you’re maintaining proper form. Looking forward as you push up can cause undue neck tension, and looking back toward your feet will lead you to lift your butt into the air and break the straight line of your body. For a mix of cardio and bodyweight strength, try out this boxing workout from Lai that features pushups as a key movement: