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.

Join the 2026 NSCA Personal Trainers Virtual Conference (PTCon) online October 27–30 for flexible continuing education, evidence-based strategies, and 2.0 CEUs.

The NSCA’s Tactical Strength and Conditioning (TSAC) Course upcoming events.

The NSCA believes in disseminating evidence-based knowledge on the benefits of strength and conditioning as well as the need for proper application of exercise to keep people safe. Browse below by topic or environment.

An individual’s training status is a key factor used to determine the volume, the intensity, and the selection of exercises for resistance training prescription. Interestingly, there are no objective parameters to assess training status, so there is ambiguity in determining the appropriate volume and other resistance training variables in this regard. Thus, the objective of this study was to propose a strategy for classification and determination of resistance training status. The following five parameters were identified and used: (a) current uninterrupted training time, (b) time of detraining, (c) previous training experience, (d) exercise technique, and (e) strength level. Moreover, 4 classification levels are proposed: beginner, intermediate, advanced, and highly advanced, which are determined by the mean score of the parameters used. The proposed model represents an important advancement in training status classification and can be used as a valid tool for training prescription and for researchers to better characterize a sample and reproduce results under the same conditions in future studies.

Join the 2026 NSCA Power Sports Performance Summit in Plainfield, IN, Sept. 26. Build explosive qualities with cueing, loading, + sport transfer. Earn 0.8 CEUs

Join 2026 APTA & NSCA Return to Play Performance Summit in Washington, D.C., Sept. 26, for physical therapy & strength and conditioning education. Earn 0.8 CEUs

Join us for the 2020 Perform Better 3-Day Functional Summit Live Stream

Attend a CSCS Exam Prep Clinic and receive a comprehensive review of the knowledge, skills, and abilities required to pass the CSCS certification exam successfully. Qualified industry professionals use their expertise to assist you and will answer your questions in this 2-day clinic. Strive for success – sign up today for this NSCA Exam Prep Clinic!

Attend a CSCS Exam Prep Clinic and receive a comprehensive review of the knowledge, skills, and abilities required to pass the CSCS certification exam successfully. Qualified industry professionals use their expertise to assist you and will answer your questions in this 2-day clinic. Strive for success – sign up today for this NSCA Exam Prep Clinic!