diff --git a/frontend/www/scripts/exercise.js b/frontend/www/scripts/exercise.js
index 24ef1862893160cb60522c397b57e83eaa214efe..57d5d9d08baa192d7a92f3ef70c5321a97f46cf0 100644
--- a/frontend/www/scripts/exercise.js
+++ b/frontend/www/scripts/exercise.js
@@ -4,7 +4,14 @@ let deleteButton;
 let editButton;
 let oldFormData;
 
-class MuscleGroup { 
+const name = "name";
+const description = "description";
+const duration = "duration";
+const calories = "calories";
+const muscleGroup = "muscleGroup";
+const unit = "unit";
+
+class MuscleGroup {
     constructor(type) {
         this.isValidType = false;
         this.validTypes = ["Legs", "Chest", "Back", "Arms", "Abdomen", "Shoulders"]
@@ -14,7 +21,7 @@ class MuscleGroup {
 
     setMuscleGroupType = (newType) => {
         this.isValidType = false;
-        
+
         if(this.validTypes.includes(newType)){
             this.isValidType = true;
             this.type = newType;
@@ -24,7 +31,7 @@ class MuscleGroup {
         }
 
     }
-    
+
     getMuscleGroupType = () => {
         console.log(this.type, "SWIOEFIWEUFH")
         return this.type;
@@ -42,19 +49,19 @@ function handleCancelButtonDuringEdit() {
     cancelButton.removeEventListener("click", handleCancelButtonDuringEdit);
 
     const form = document.querySelector("#form-exercise");
-    if (oldFormData.has("name")) form.name.value = oldFormData.get("name");
-    if (oldFormData.has("description")) form.description.value = oldFormData.get("description");
-    if (oldFormData.has("duration")) form.duration.value = oldFormData.get("duration");
-    if (oldFormData.has("calories")) form.calories.value = oldFormData.get("calories");
-    if (oldFormData.has("muscleGroup")) form.muscleGroup.value = oldFormData.get("muscleGroup");
-    if (oldFormData.has("unit")) form.unit.value = oldFormData.get("unit");
-    
-    oldFormData.delete("name");
-    oldFormData.delete("description");
-    oldFormData.delete("duration");
-    oldFormData.delete("calories");
-    oldFormData.delete("muscleGroup");
-    oldFormData.delete("unit");
+    if (oldFormData.has(name)) form.name.value = oldFormData.get(name);
+    if (oldFormData.has(description)) form.description.value = oldFormData.get(description);
+    if (oldFormData.has(duration)) form.duration.value = oldFormData.get(duration);
+    if (oldFormData.has(calories)) form.calories.value = oldFormData.get(calories);
+    if (oldFormData.has(muscleGroup)) form.muscleGroup.value = oldFormData.get(muscleGroup);
+    if (oldFormData.has(unit)) form.unit.value = oldFormData.get(unit);
+
+    oldFormData.delete(name);
+    oldFormData.delete(description);
+    oldFormData.delete(duration);
+    oldFormData.delete(calories);
+    oldFormData.delete(muscleGroup);
+    oldFormData.delete(unit);
 
 }
 
@@ -66,12 +73,12 @@ async function createExercise() {
     document.querySelector("select").removeAttribute("disabled")
     const form = document.querySelector("#form-exercise");
     const formData = new FormData(form);
-    const body = {"name": formData.get("name"), 
-                "description": formData.get("description"),
-                "duration": formData.get("duration"),
-                "calories": formData.get("calories"),
-                "muscleGroup": formData.get("muscleGroup"), 
-                "unit": formData.get("unit")};
+    const body = {name: formData.get(name),
+        description: formData.get(description),
+        duration: formData.get(duration),
+        calories: formData.get(calories),
+        muscleGroup: formData.get(muscleGroup),
+        unit: formData.get(unit)};
 
     const response = await sendRequest("POST", `${HOST}/api/exercises/`, body);
 
@@ -145,12 +152,12 @@ async function updateExercise(id) {
 
     const selectedMuscleGroup = new MuscleGroup(formData.get("muscleGroup"));
 
-    const body = {"name": formData.get("name"), 
-                "description": formData.get("description"),
-                "duration": formData.get("duration"),
-                "calories": formData.get("calories"),
-                "muscleGroup": selectedMuscleGroup.getMuscleGroupType(),
-                "unit": formData.get("unit")};
+    const body = {name: formData.get(name),
+        description: formData.get(description),
+        duration: formData.get(duration),
+        calories: formData.get(calories),
+        muscleGroup: selectedMuscleGroup.getMuscleGroupType(),
+        unit: formData.get("unit")};
     const response = await sendRequest("PUT", `${HOST}/api/exercises/${id}/`, body);
 
     if (!response.ok) {
@@ -167,15 +174,15 @@ async function updateExercise(id) {
     deleteButton.className += " hide";
     cancelButton.className += " hide";
     editButton.className = editButton.className.replace(" hide", "");
-    
+
     cancelButton.removeEventListener("click", handleCancelButtonDuringEdit);
-        
-    oldFormData.delete("name");
-    oldFormData.delete("description");
-    oldFormData.delete("duration");
-    oldFormData.delete("calories");
-    oldFormData.delete("muscleGroup");
-    oldFormData.delete("unit");
+
+    oldFormData.delete(name);
+    oldFormData.delete(description);
+    oldFormData.delete(duration);
+    oldFormData.delete(calories);
+    oldFormData.delete(muscleGroup);
+    oldFormData.delete(unit);
 }
 
 window.addEventListener("DOMContentLoaded", async () => {
@@ -196,7 +203,7 @@ window.addEventListener("DOMContentLoaded", async () => {
         deleteButton.addEventListener("click", (async (id) => deleteExercise(id)).bind(undefined, exerciseId));
         okButton.addEventListener("click", (async (id) => updateExercise(id)).bind(undefined, exerciseId));
         return;
-    } 
+    }
     //create
     setReadOnly(false, "#form-exercise");
 
@@ -206,4 +213,4 @@ window.addEventListener("DOMContentLoaded", async () => {
 
     okButton.addEventListener("click", async () => createExercise());
     cancelButton.addEventListener("click", handleCancelButtonDuringCreate);
-});
\ No newline at end of file
+});