On week seven of the ultimate sports competition, Marshall must teach the rest of the athletes BMX racing. But the extreme training takes its toll on them both physically and mentally. Brodie's attitude toward the new sport makes the podium harder for him to reach, and Faith's enthusiasm for BMX racing results in a scary moment.

Kart racing is this week's sport and Faith this week's sport leader. She will have to get her fellow athletes competition ready in only three days. Haven struggles to get her pedal to the medals, Jasmine encounters a fiery situation, and Sydney just barely escapes disaster. Engines and emotions run high in a competition filled with twists, turns, and trouble for the athletes.