As well as requiring strength in the muscles of the core and back, eka pada salamba navasana also requires some flexibility in the hamstrings of the extended leg. It can be used to help yogis build the strength and whole body integration, awareness and balance needed for paripurna navasana.
Traditionally, eka pada salamba navasana, like navasana, is associated with the manipura chakra. Working with this chakra is said to help yogis who are lacking in confidence or feeling powerless. While it builds muscular strength, it can cultivate the inner strength to overcome obstacles, such as self doubt or fear.
To modify this posture, the hands can remain on the ground or hold the lifted leg for extra support.