Final answer:
Track and field sprinters should avoid using resistance training loads that significantly reduce running velocity. The recommended limit is usually around 10-15% velocity reduction to avoid compromising sprinting technique and speed development.
Step-by-step explanation:
Track and field sprinters should not use resistance training loads, such as weighted sleds, that reduce running velocity by more than a certain percentage. This is because excessive resistance can hinder speed development and compromise sprinting technique.
While there isn't a specific percentage mentioned in the question, typically, coaches recommend not using resistance training loads that reduce running velocity by more than 10-15%. The focus of resistance training for sprinters should be on maintaining or improving running mechanics, explosive power, and speed.
By using resistance training loads that reduce running velocity by a reasonable amount, sprinters can still develop strength and power without negatively impacting their ability to maintain or improve their running speed.