diff --git a/frontend/www/scripts/exercise.js b/frontend/www/scripts/exercise.js
index b7c04d9dab91c28f0d77f69d35d407d811a936b5..6f70adfdfd511c0207d3e6765e2a63a94460f4ad 100644
--- a/frontend/www/scripts/exercise.js
+++ b/frontend/www/scripts/exercise.js
@@ -30,6 +30,12 @@ class MuscleGroup {
     }
 }
 
+const NAME = "name";
+const DESCRIPTION = "description";
+const DURATION = "duration";
+const CALORIES = "calories";
+const MUSCLEGROUP = "muscleGroup";
+const UNIT = "unit";
 function handleCancelButtonDuringEdit() {
     setReadOnly(true, "#form-exercise");
     document.querySelector("select").setAttribute("disabled", "")
@@ -41,24 +47,24 @@ 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");
+    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);
     
     deleteFormData();
 
 }
 
 function deleteFormData() {
-    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);
 }
 
 function handleCancelButtonDuringCreate() {
@@ -69,12 +75,12 @@ 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);
 
@@ -131,7 +137,7 @@ async function retrieveExercise(id) {
     const formData = new FormData(form);
 
     for (const key of formData.keys()) {
-        const selector = key !== "muscleGroup" ? `input[name="${key}"], textarea[name="${key}"]` : `select[name=${key}]`
+        const selector = key !== MUSCLEGROUP ? `input[name="${key}"], textarea[name="${key}"]` : `select[name=${key}]`
         const input = form.querySelector(selector);
         const newVal = exerciseData[key];
         input.value = newVal;
@@ -146,14 +152,14 @@ async function updateExercise(id) {
     const muscleGroupSelector = document.querySelector("select")
     muscleGroupSelector.removeAttribute("disabled")
 
-    const selectedMuscleGroup = new MuscleGroup(formData.get("muscleGroup"));
+    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) {