During the first trimester of pregnancy, it is important to exercise caution and make some adjustments to your movements. While you can generally continue moving around as usual, it is advisable to avoid any sudden or jerky movements that could potentially harm your baby. Bending over should also be done carefully, using your knees instead of your waist to minimize strain on your back. When it comes to exertion, moderate exercise is generally safe for most pregnant women, but it's always a good idea to consult with your healthcare provider for personalized advice. As for heavy lifting, it is best to avoid it altogether or seek assistance when needed. Remember that every pregnancy is different, so listen to your body and prioritize your safety and the well-being of your baby.