Player is running just few seconds

The player is running just few seconds,How can i fix it? This is my player running code: using UnityEngine; using System.Collections;

 public class Running : MonoBehaviour 
 {
     public Animator animator;
     
     public float rotSpeed = 90f;
     public bool canRun = true;
     public float r;
     
     void Start () 
     {
         animator = GetComponent<Animator>();
     }
     
     void Update () 
     {
         
         
     }
     
     void FixedUpdate()
     {
         
         float h = Input.GetAxis ("Horizontal");
         float v = Input.GetAxis ("Vertical");
         r = Input.GetAxis ("Run");
         
         animator.SetFloat ("V Input", v);
         animator.SetFloat ("Turning", h);
         transform.Rotate(new Vector3(0, h * Time.deltaTime * rotSpeed, 0));
         
         StartCoroutine (ProcessRun ());
     }
     
     IEnumerator ProcessRun()
     {
         if (r == 1 && canRun == true)
         {
             animator.SetBool ("Running", true);
             yield return new WaitForSeconds(0);
             animator.SetBool ("Running", false);
             canRun = false;
             print (canRun);
 
         }
         else if (r == 0)
         {
             yield return new WaitForSeconds(0);
             canRun = true;
         }
     }
 }