Compared to an Olympic sprinter in perfect condition, would an obese person who has never exercised be more likely to have a heart that can, with each beat, move
more blood less blood?
A B
When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction.
amount of blood is pumped with each heart contraction
stronger
more
MORE
MORE
heart muscle strength
move more
move less
blood
blood
blood