It is well known that moderate exercise during pregnancy benefits maternal and fetal well-being. The benefits of more vigorous exercise for pregnant women are less clear. The boundaries of safe exercise during pregnancy remain a matter for continued research, which is important to the growing number of female athletes who plan on becoming pregnant. The purpose of this article is to discuss the existing research related to the physiological concerns of the pregnant endurance athlete specifically. Because endurance training includes prolonged and repetitive exercise bouts at varying intensities, topics will include the effect of high-intensity exercise on uterine blood flow and thermoregulation, metabolic, and musculoskeletal changes in pregnancy.

In this session from the 2020 NSCA Coaches Conference, Matt Nein, Coordinator of Sports Performance at Salisbury University, discusses his fluid periodization model for coaches to use to easily adapt to the changing situations on a week-to-week (or even day-to-day) basis, and still optimize training for the athletes.

The Journal of Strength and Conditioning Research is the NSCA's scientific journal. This monthly publication prints original research information important to strength and conditioning practitioners. Many educational institutions, researchers, and professionals retain this journal as a valuable reference.

Join the 2026 NSCA Training for the Endurance Athlete Summit in Tempe, AZ, on March 28. Explore endurance training performance, learn hands-on, + earn 0.8 CEUs.

In this video from the 2023 NSCA National Conference, Duncan French discusses effective decision-making processes within strength and conditioning, and how coaches can identify, review, and improve training interventions for strength, power, and conditioning.