Input.GetAxis troubles

I think I might be missing something here with regards to Input.GetAxis. No matter what I do, I can’t seem to affect the speed added to my rigidbody.

using UnityEngine;
using System.Collections;

public class PlayerControl : MonoBehaviour

	public float speed = 1.0f;

  	void FixedUpdate ()

			float foreAndAft = Input.GetAxis ("Vertical") * speed;
			Debug.Log (foreAndAft);
			rigidbody.AddRelativeForce (0, 0, foreAndAft);

My log shows a consistent 16 for the forAndAft Debug.Log command. I thought Input.GetAxis returned a value from -1 to 1.

No matter how low I set the speed variable - even to incredibly-close-to-zero values, the rigidbody always moves too quickly.

Any insight would be greatly appreaciated. Thanks

Are you resetting the ‘speed’ variable in the Inspector? Changing it in script after the script is attached to a game object does nothing. Also what is driving the Input.GetAxis? If it is a keystroke, then you will only get values near -1, 0 and 1. You get a range of values from an analog device like a joystick.