Which speed condition triggers a transition from walking to running to maintain efficiency?

Which speed condition triggers a transition from walking to running to maintain efficiency?

• A. Faster-than-preferred speed
• B. Slower-than-preferred speed
• C. Preferred speed
• D. Static standing

Answer: (A)

Locomotion becomes most efficient when you pick the gait that has the lowest energy cost per meter at the given speed. There isn’t a single fixed speed for everyone; instead, there’s a crossover point where walking and running switch which is more economical. Below that speed, walking is typically more efficient; above it, running saves energy per distance because of factors like the flight phase and elastic energy return in tendons. So when you move faster than your usual walking pace, continuing to walk becomes energetically more costly, and the body naturally transitions to running to keep the effort down. Slower speeds stay in walking, and standing still isn’t about maintaining forward locomotion, so the trigger for switching is pushing beyond the preferred walking speed.

Locomotion becomes most efficient when you pick the gait that has the lowest energy cost per meter at the given speed. There isn’t a single fixed speed for everyone; instead, there’s a crossover point where walking and running switch which is more economical. Below that speed, walking is typically more efficient; above it, running saves energy per distance because of factors like the flight phase and elastic energy return in tendons. So when you move faster than your usual walking pace, continuing to walk becomes energetically more costly, and the body naturally transitions to running to keep the effort down. Slower speeds stay in walking, and standing still isn’t about maintaining forward locomotion, so the trigger for switching is pushing beyond the preferred walking speed.