diff --git a/front_end/src/components/object/detailSession.tsx b/front_end/src/components/object/detailSession.tsx
index 7f04360..c9df293 100644
--- a/front_end/src/components/object/detailSession.tsx
+++ b/front_end/src/components/object/detailSession.tsx
@@ -1,5 +1,5 @@
 import { useEffect, useState } from "react";
-import { Activite, Athlete, Session } from "../../classes";
+import { Activite, Admin, Athlete, Coach, Session } from "../../classes";
 import { dateToString, hoursToString } from "../edt";
 import { Modal } from "../Modal";
 import CreateActivite from "../createActivite";
@@ -22,6 +22,8 @@ function DetailSession({session,open,setOpen}:Props){
     const [loading,setLoading] = useState<boolean>(false);
     const [join,setJoin] = useState<boolean>(user instanceof Athlete && user.sessions.includes(session));
 
+    //Vérification pour l'ajout et la suppression des activités
+    const canEdit = user instanceof Admin  || user instanceof Coach;
     const sDate = session.creneau;
 
     function handleDeleteActivite(activite:Activite): void {
@@ -108,11 +110,15 @@ function DetailSession({session,open,setOpen}:Props){
                             {activites.map((activite,index)=>(
                                 <div>
                                     {activite.nom}
-                                    <button className="deleteButton" onClick={() => handleDeleteActivite(activite)}>x</button>
-                                    </div>
+                                    {canEdit && (
+                                        <button className="deleteButton" onClick={() => handleDeleteActivite(activite)}>x</button>
+                                    )}
+                                </div>
                             ))}
-                            <button  className="addButton" onClick={() => handleAddActivite()}>+</button>
-                            {loading && <div className='top_left_loading'><Loading/></div>}
+                            {canEdit && (
+                                <button  className="addButton" onClick={() => handleAddActivite()}>+</button>
+                            )}
+                                {loading && <div className='top_left_loading'><Loading/></div>}
                         </div>
                         
                     </div>
diff --git a/front_end/src/components/object/user.tsx b/front_end/src/components/object/user.tsx
index 38dbb0d..c8ade51 100644
--- a/front_end/src/components/object/user.tsx
+++ b/front_end/src/components/object/user.tsx
@@ -18,12 +18,22 @@ type Props = {
 
 function ObjectUser({admin=null,athlete=null,coach=null}:Props){
 
+
     const {user,setUser} = useLocalData()
     const[user2,setUser2]= useState<User>(getUser());
     const [open, setOpen] = useState<boolean>(false);
     const [open2, setOpen2] = useState<boolean>(false);
     const [loading,setLoading] = useState<boolean>(false);
-    const [sessions,setSessions] = useState<Session[]>([]);
+
+    // Initialisation sécurisée des sessions
+    function getInitialSessions(): Session[] {
+        if (athlete) return [...(athlete.sessions || [])];
+        if (coach) return [...(coach.sessions || [])];
+        return [];
+    }
+
+    const [sessions, setSessions] = useState<Session[]>(getInitialSessions());
+
 
     function getUser(): User{
         if(admin!=null) return admin;
@@ -75,7 +85,7 @@ function ObjectUser({admin=null,athlete=null,coach=null}:Props){
     useEffect(() => {
         if(!loading){
             if(athlete!==null){
-                setSessions([...athlete.sessions])
+                setSessions([...(athlete.sessions || [])]);
             }
             if(coach!==null){
                 setSessions([...coach.sessions])
@@ -87,6 +97,7 @@ function ObjectUser({admin=null,athlete=null,coach=null}:Props){
     function returnSession(session: Session|null){
         if(session!==null){
             if(athlete!==null){
+                athlete.sessions = athlete.sessions || [];
                 athlete.sessions.push(session);
                 setSessions([...athlete.sessions])
             }
@@ -101,7 +112,7 @@ function ObjectUser({admin=null,athlete=null,coach=null}:Props){
     return(
         <div>
             <div className="object" onClick={() => handleOpen()}>
-                    <div>{user2.nom}</div>
+                    <div>{user2.prenom} {user2.nom}</div>
                     
                     {/* <div>{user2.role}</div> */}
             </div>
@@ -117,7 +128,7 @@ function ObjectUser({admin=null,athlete=null,coach=null}:Props){
                         </div>
                         {athlete !== null && (
                             <div className="stats-container">
-                                <StatAthlete athlete={athlete} sessions={sessions} />
+                                <StatAthlete athlete={athlete} sessions={athlete?.sessions || []} />
                             </div>
                         )}
                     </div>