In this episode of POPSUGAR's House Call, Jeanette Jenkins, creator of The Hollywood Trainer Club, and fitness trainer Kenta Seki will guide you through a follow-along 15-minute ab-burner workout to help you tighten your core from the comfort of your own home — no equipment needed! Stay tuned for more instalments of POPSUGAR's House Call as Jeanette helps you stay fit with some help from her celebrity clients, trainers, and athletes.