Provided are adjustable, modular lumbar support devices that may be used to provide lumbar and/or belly support for mammals having belly weight. According to non-limiting example embodiments, support or brace devices provided herein may be worn by pregnant women at various stages throughout a woman's pregnancy, and/or post-partum and may be adjusted to naturally contour/conform to the woman's anatomy, which changes throughout pregnancy. Also provided herein are methods of preventing and/or reducing back pain in a mammal that include applying the lumbar support to a mammal as directed. Further provided are kits that include at least one lumbar support device provided herein, which kit may optionally include instructions for proper application and/or adjustment of the lumbar support device.
