Body shape changes, physical discomfort, loss of confidence... Women too busy to exercise almost all face these issues. Now, one ball can completely transform your life--simply sit on a balance ball and bounce. Author Sayaka Oda gave birth to her daughter at age 32 and returned to work when her daughter turned one. Juggling housework, childcare, and her career left her chronically exhausted, with her weight hitting new highs every year. Her husband even teased her, "Do you want to end up like those big-bottomed foreign ladies?" Later, she discovered "balance ball classes." She found that simply bouncing on the ball and moving her limbs brought a sense of exhilaration that made her "forget all her fatigue." She began dedicating herself to balance ball exercises. After three months, her waistline shrunk by 10 centimeters, she lost 7 kilograms, and even her irritability vanished.
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