"HEALTH & FITNESS Reference." . . "HEALTH & FITNESS Healthy Living." . . "MEDICAL Preventive Medicine." . . . . . . . . . "Ab wheel workouts : 50 exercises to stretch and strengthen your abs, core, arms, back and legs"@en . "Ab wheel"@en . "Electronic books"@en . . . . . . . . . . "Supercharge your core workout, and achieve the ripped, rock-hard abs you've always wanted! An ab wheel is a simple, compact piece of equipment that helps with intense muscle building and fast fat burning. This guide provides exercises and six progressive training programs."@en . "50 exercises to stretch and strengthen your abs, core, arms, back and legs"@en . . . . "HEALTH & FITNESS Holism." . .