For longer vaginal use, it should be ensured that Viball is held securely above the vaginal entrance without any tension. However, as these mostly large models are also correspondingly heavy, we recommend our large models VB50, VB55 and VB60 in light version, i.e. with significantly reduced weight, for particularly weak muscles. If these balls do not hold or are pushed out by the uterus in the case of a prolapsed uterus, preparatory training is necessary. There are two options for this: First, short-term, active exercises are carried out with smaller balls for a while until the vaginal entrance has strengthened and narrowed enough to bear the weight of a larger Viball. This preparatory training can take several weeks and also require intermediate steps in ball sizes. An alternative to this is preparatory training with a large ball in the quadruped or knee-elbow position, ideally alternating with lying on your back with your pelvis slightly raised. This way the weight of the ball does not pull downwards and you can use the much higher vibration impulse of the larger ball. In all four-legged positions, you should try to "pull the ball inwards", alternating with circular movements of the pelvis during rest periods. Due to the intensive contact with the G-spot and cervix, these exercises have a strong erotic effect - which only helps to strengthen the pelvic floor muscles. Of course, there is nothing to stop you combining the two training methods mentioned above with different ball sizes.