Life Coaching is about taking a client from where they are to where they want to go. A person with a specific goal or who is going through a particular change in life may employ a life coach to help guide and encourage them through the transition, just as a personal trainer may help a client with a fitness goal. Life coaches can also help clients who feel stuck and in need of new direction. In essence, a life coach is someone who walks alongside a person for a season of life and coaches him through it. A "Christian life coach" would be a Christian who is employed as a life coach or one who includes Christian spirituality in coaching.
Some of the concepts behind life coaching are biblical. We are called to "encourage one another and build each other up" (1 Thessalonians 5:11). We see Paul exhorting believers to live holy lives. We are told to "carry each other’s burdens" (Galatians 6:2). The concept of mentorship or discipleship is sprinkled throughout Scripture. Clearly, Christians should be living in community, and we all need help sometimes in meeting certain goals. Inasmuch as a life coach assists with these things, there is nothing explicitly unbiblical about it.