Which type of lever is for speed?

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For speed, the lever class where the muscle (effort) is applied between the fulcrum and the load is the best fit. This arrangement reduces leverage for lifting heavy loads but increases the velocity and range of the moving segment. In the body, many limb movements use this setup: the joint acts as the fulcrum, the muscle attaches between the joint and the distal segment, so the distal part can move quickly even though the force generated isn’t as large. This trade-off—favoring speed and range over force—characterizes the lever type used to produce rapid movements. The other lever types optimize balance or force for lifting, not speed.