Final answer:
The kinematic questions in Kathy's research are focused on motion characteristics such as muscle activation, hip extension acceleration, and knee range of motion, while the duration of an exercise is not a kinematic aspect.
Step-by-step explanation:
Analysis of Kinematic Questions in Exercise Research
When considering the research interests of physical therapist Kathy on the differences between lunge and squat exercises, it's important to understand that kinematic questions focus on motion without considering the forces that cause the motion. Options A, B, and C assess kinematic aspects by looking at muscle activation, hip extension acceleration, and knee range of motion, respectively. Option D, which asks whether one exercise takes longer to complete, does not pertain to kinematics as it focuses on the duration of an exercise and not the movement's characteristics.
Kinematics in physical therapy often involves the assessment of how exercises affect the movement and stability of joints and muscles. This includes the activation of muscle groups like the vastus medialis and the vastus lateralis, both part of the quadriceps femoris group, which are crucial for knee extension. On the other hand, the study of exercise duration would fall more under the purview of exercise physiology rather than kinematics.