What Is the Appropriate Level of Physical Activity During the First Trimester of Pregnancy?

Generally, during the first trimester of pregnancy, the appropriate level of physical activity should be determined based on individual comfort and perception—there is no universal standard. A detailed analysis follows:

During early pregnancy, embryonic implantation and development remain unstable. Individual differences in maternal constitution and severity of early-pregnancy symptoms (e.g., nausea, fatigue) are considerable. Some women experience stable physical conditions with no discomfort and may engage in light activity; others suffer from symptoms such as nausea, fatigue, or a sensation of pelvic pressure or heaviness, indicating lower physical tolerance. Moreover, the placenta has not yet fully formed, and hormonal fluctuations are pronounced. Excessive exercise may stimulate uterine contractions, whereas complete inactivity can reduce metabolic rate and exacerbate pregnancy-related fatigue. Therefore, there is no need to prescribe fixed durations or intensities for exercise. Instead, prioritize comfort: physical activity should leave you feeling refreshed—not fatigued—with no abdominal pain or abnormal vaginal bleeding. Adjust your activity level flexibly according to your own physical condition.

In early pregnancy, prioritize gentle activities such as slow walking and static stretching. Avoid running, jumping, vigorous stretching, or weight-bearing exercises. If you experience worsening nausea, mild lower abdominal pain, or low back discomfort with a sensation of pelvic pressure or heaviness, stop all activity immediately and rest in bed. Do not blindly follow fitness trends or force yourself to exercise. Attend scheduled prenatal check-ups regularly. If signs of threatened miscarriage appear (e.g., vaginal bleeding, cramping), strict bed rest is required.