Electromyographic activity of the rectus abdominis during a traditional crunch and the basic jackknife exercise with the Ab Lounge - Nelson, Gail A; Bent-Forsythe, Denise A; Roopchand-Martin, Sharmella C (Journal of strength and conditioning research, 2012)
Keywords: Biomechanical Phenomena; Electromyography; Exercise - physiology; Female; Humans; Male; Models, Theoretical; Muscle Contraction - physiology; Rectus Abdominis - physiology; Task Performance and Analysis; Young Adult