When NFL running backs train with parachutes attached to their backs, the parachute creates additional air resistance, which increases the net force opposing the runner's motion. This added resistance forces the runner to exert more effort to maintain speed, building muscle strength and endurance over time. By overcoming this extra force, runners enhance their ability to accelerate and sprint while improving their overall performance on the field.
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NFL running backs sometimes train with parachutes attached to their backs while running.
In 2-4 sentences, explain how the parachute affects the net force acting on the runner and whytraining this way can help build a runner’s strength.
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