Technology & Tools Flashcards
7 cards from real Sports and Fitness 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 & Tools flashcards as text
Which sensor in most wrist-worn activity trackers detects movement to estimate step count?
Answer: Accelerometer
An accelerometer detects changes in acceleration, which algorithms turn into step counts.
Optical heart rate sensors on smartwatches rely on which technology?
Answer: Photoplethysmography (PPG)
PPG shines light into the skin and detects changes in blood volume with each heartbeat.
Why is a chest-strap heart rate monitor usually more accurate than a wrist optical sensor during high-intensity intervals?
Answer: It detects the heart's electrical signals directly
Chest straps pick up the heart's electrical activity, so wrist movement and blood-flow lag affect them less.
An athlete's wearable shows resting heart rate variability (HRV) well above their usual baseline. What does this generally suggest?
Answer: Good recovery and readiness to train
Higher-than-baseline HRV usually reflects strong parasympathetic activity and good recovery.
A cyclist's Functional Threshold Power (FTP), measured with a power meter, is best defined as:
Answer: The highest average power sustainable for about one hour
FTP estimates the highest power a rider can hold for roughly 60 minutes, often from 95% of a 20-minute test.
ANT+ and Bluetooth Low Energy are best described as:
Answer: Wireless protocols that connect fitness sensors to devices
Both are low-power wireless standards that link sensors like HR straps and power meters to watches and apps.
A runner's GPS watch shows erratic pace and extra distance while running between tall downtown buildings. What is the most likely cause?
Answer: Signal reflection (multipath) in an urban canyon
Tall buildings bounce satellite signals, causing position errors called multipath.
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