Relax, it's temporary. It will be heavier because your legs will be equivalent to congestion after exercise and become thicker and heavier. This requires your muscles to have an adaptation process. Accustomed to it, I'll lose weight soon. It usually takes about 1-2 weeks. Moreover, people's weight will be different in one day. Don't make a fuss just because you gained a little weight after exercise. Finally, losing weight has no strength and is not a healthy method at all. Even if you lose weight now, you will rebound after a while.