First, He wants to have assurance of your salvation. Because of your commitment. Second, as evidence of giving Jesus control of your life, He wants you to publicly confess Him and follow Him in baptism and church membership. Third, Jesus wants you to grow into a strong, faithful disciple. You should read it, study it, memorize it, practice it, and hear it taught and preached.
Spiritual breathing is prayer.
Spiritual exercise means helping others, witnessing, giving time and energy to God's work, and being a living testimony to the world you live in. Rest means being still and waiting on God. It means physical and spiritual renewal. Fourth, Jesus wants you to experience victory over sin in your daily life. Even with victory assured, there will be acts of disobedience and failures because of your human nature.