Effect of Regular Exercise in Prevention of Excessive Weight Gain in Pregnancy

Each session starts with ca 5 minutes warm up, followed by 30 minutes of aerobic activity, including cool down. This is followed by 15 minutes of strength training of the upper and lower limbs, and special focus on the deep abdominal stabilization muscles. The last 5 minutes contains stretching, relaxation and body awareness exercises. The exercise-program follows the ACOG exercise prescription, and all aerobic activities will be performed at moderate intensity (60-70% of maximal heart rate), measured by ratings of perceived exertion at 11-14 (somewhat hard) on the 6-20 Borg's rating scale. Control-participants are neither encouraged nor discouraged from exercising.