Yes ~ ~ but shake it for at least 20 minutes at a time. At the beginning of exercise, your abdomen may be sore .. It's normal ~ ~ Stick to it .. It will get better in a few days ~ ~ You need to stick to it ~ ~ But be careful not to shake after meals! ~ ~ ~ You can do strenuous exercise for at least one hour after meals ~ ~ You can also do sit-ups ~ ~ The important thing is that you exercise and stick to it ~ ~