Thintervention With Jackie Warner

Fitness and lifestyle expert, Jackie Warner, begins "Thintervention" with eight pampered clients who are unhappy with their weight. After a basic training workout in order to assess their fitness levels, the clients are told to remove all sugar from their homes.

Week two begins with basic training, which does not produce such great results. Jackie surprises the clients when she pairs them up for the week to support each other through the weight-loss process. The newly formed teams then gather in Griffith Park for the extreme workout, where they're tethered to each other for a grueling hike up the mountainside.

After three weeks of intensive training, the program has begun to take its toll on the clients. After a series of heated exchanges, Jackie challenges the group to meet for dinner to resolve their issues.

Jackie adopts a new method in week four's basic training, sending the team on a three-mile run through Magnolia Park. Later in the week, Jackie takes the clients through an epic firefighter workout, complete with hunky firefighters.

Five weeks into the program, several of the clients have yet to make any real dents in their weight-loss goals. To get to the bottom of this trend, Jackie assesses the intensity of everyone at basic training and drops by their houses the next day to follow-up.

Finally, the clients have begun to see differences in both their weight and confidence levels, so Jackie presents a new theme of the week: getting in touch with their "inner sexy." The extreme workout brings this theme to fruition when Robin Antin of the Pussycat Dolls leads a sweat-filled dance where everyone has a chance to strut their stuff.

Jackie has one last week with the clients before she sends them off to work the program on their own for six weeks. In order to jumpstart their transition, Jackie takes the clients to a sports and fitness resort so she can work them out around the clock.

The clients have been away from Jackie for six weeks, struggling to use everything that she taught them to realize their ultimate weight loss goals. The clients' friends and family are brought together for a final reveal and celebration.