Exercise Science Flashcards
7 cards from real BSI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Exercise Science flashcards as text
Which type of muscle contraction produces force while the muscle shortens?
Answer: Concentric
A concentric contraction generates tension as the muscle shortens.
Holding a streamlined position against a wall push-off mainly involves which contraction type in the core?
Answer: Isometric
Holding a fixed position produces tension without changing muscle length, which is isometric.
Which factor is the main reason most people float more easily in salt water than fresh water?
Answer: Salt water is denser, so it provides more buoyant force
Greater water density displaces more weight per volume, increasing buoyancy.
Which body composition trait generally makes a swimmer more buoyant?
Answer: Higher body fat percentage
Fat is less dense than water, so more body fat increases buoyancy.
Which type of drag increases most when a swimmer's body position is not horizontal?
Answer: Form (pressure) drag
Form drag depends on frontal surface area, which grows when hips and legs sink.
Newton's third law explains swimming propulsion because:
Answer: Pushing water backward moves the swimmer forward
Every action has an equal and opposite reaction, so pushing water back propels the body forward.
Which cardiovascular adaptation commonly results from regular aerobic swim training?
Answer: Increased stroke volume
Aerobic training enlarges the left ventricle and increases blood pumped per beat.