Technology & Digital Tools Flashcards
7 cards from real CSCS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Technology & Digital Tools flashcards as text
When an athlete performs a countermovement jump (CMJ) on a force plate, the device primarily records:
Answer: Ground reaction forces, from which jump height and power can be derived
Force plates measure vertical (and horizontal) ground reaction forces over time, enabling calculation of impulse, jump height, power, and rate of force development.
The reactive strength index (RSI) is calculated as:
Answer: Jump height divided by ground contact time
RSI = jump height / ground contact time, quantifying an athlete's ability to rapidly absorb and redirect force during stretch-shortening cycle tasks like drop jumps.
Electromyography (EMG) in sport science primarily quantifies:
Answer: Electrical activity generated by contracting skeletal muscle
EMG detects the electrical signals produced by motor unit activation in muscle, enabling assessment of muscle onset timing, activation level, and fatigue.
A 3D motion capture system using retroreflective markers is primarily used to obtain:
Answer: Three-dimensional kinematics of body segments and joint angles
Retroreflective marker-based systems (e.g., Vicon, Motion Analysis) track marker positions in 3D space to calculate joint angles, segment velocities, and movement patterns.
Which force plate variable is widely considered the most sensitive indicator of acute neuromuscular fatigue?
Answer: Rate of force development (RFD) or CMJ flight time
RFD and CMJ flight time are highly sensitive to neuromuscular fatigue because explosive force expression declines before peak force is noticeably affected.
The primary practical advantage of markerless motion capture over traditional marker-based systems is:
Answer: Reduced setup time and no need to attach markers to the athlete
Markerless systems use depth cameras or AI pose estimation to track body segments without physical markers, dramatically cutting preparation time in applied sport settings.
The free video analysis software Kinovea is primarily used in sport science for:
Answer: 2D video-based motion analysis including angle measurement and tracking
Kinovea allows coaches and practitioners to measure angles, draw reference lines, slow footage, and compare movements frame-by-frame directly from video.