Performance Assessment Technologies Flashcards

Which inertial measurement unit (IMU) sensor axis combination is most commonly used to quantify athlete jump height via double integration of acceleration?

Answer: Accelerometer vertical axis alone

Vertical axis accelerometer data is double-integrated over flight time to estimate jump height in IMU-based systems.

In GPS-based athlete monitoring, what does the term 'metabolic power' estimate during sport activity?

Answer: Energy expenditure derived from velocity and acceleration data

Metabolic power models use instantaneous velocity and acceleration from GPS to estimate energy expenditure per unit time.

A performance scientist uses an optical motion capture system with 16 cameras. What is the primary purpose of calibrating the capture volume before data collection?

Answer: To establish a shared 3D coordinate system across all cameras

Calibration defines a common 3D reference frame so each camera's 2D image data can be reconstructed into accurate 3D positions.

Which blood flow restriction (BFR) technology metric is standardized to minimize inter-individual variation in cuff pressure?

Answer: Limb occlusion pressure percentage

Setting BFR pressure as a percentage of limb occlusion pressure (LOP) accounts for individual differences in limb circumference and arterial pressure.

In near-infrared spectroscopy (NIRS) for muscle oxygenation monitoring, what does the SmO2 parameter represent?

Answer: Muscle tissue oxygen saturation percentage

SmO2 is the percentage of hemoglobin and myoglobin that is oxygenated within the muscle tissue being measured.

Which technology is most commonly used to measure ground reaction forces during a bilateral squat in a laboratory setting?

Answer: Dual force plates with independent left and right channels

Dual force plates allow separate measurement of each limb's ground reaction force, enabling detection of bilateral asymmetries.

What is the primary limitation of using satellite-based GPS for tracking athletes in indoor arenas?

Answer: GPS cannot function without line-of-sight to satellites, which buildings block

GPS relies on satellite signals that cannot penetrate building structures, rendering outdoor GPS systems unusable indoors.