How long does it take for the Pilates core bed to be effective?

It will be effective in more than one month.
Research shows that: 1-3 consecutive Pilates machine training sessions per week can reduce about 1.6KG of fat and increase 1KG of muscle. 1 hour of core bed training = "1 hour of machine training" + "1 hour of aerobic exercise" can increase muscle strength and relieve fatigue, burn fat and grow muscle.
Make muscle lines beautiful, relieve muscle soreness and pain, and fundamentally improve body shape. At the same time, improve the control of the trunk and the coordination of limb movements, improve posture, shape a tight body, and enhance sports performance. Strengthening the training of deep muscles and trunk stability can improve flexibility, increase muscle strength, and enhance the body's control ability and stability, balance, and coordination ability.