diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
index a2c9073..fde65e0 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
@@ -14,6 +14,7 @@ import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -43,10 +44,10 @@ public class AthleteResource {
     @PostMapping("/create")
     @PreAuthorize("hasRole('Admin')") // Only admin can create??
     public ResponseEntity<AthleteDTO> create(@RequestBody AthleteDTO dto) {
-        Athlete ahtlete = new Athlete();
-        ahtlete.setName(dto.getName());
-        ahtlete.setCategorie(dto.getCategorie());
-        ahtlete.setNiveau(dto.getNiveau());
+        Athlete athlete = new Athlete();
+        athlete.setName(dto.getName());
+        athlete.setCategorie(dto.getCategorie());
+        athlete.setNiveau(dto.getNiveau());
         return ResponseEntity.status(HttpStatus.CREATED).body(mapToDTO(athlete));
     }
 
@@ -78,16 +79,15 @@ public class AthleteResource {
             athlete.setCategorie(dto.getCategorie());
             athlete.setNiveau(dto.getNiveau());
 
-            // List
-            if (dto.getDataActivite() != null) {
-                athlete.setDataActivite(dto.getDataActivite());
-            }
-
             // Relationship: sessionId → session
-            if (dto.getSessionId() != null) {
-                Session session = sessionDAO.findById(dto.getSessionId())
-                        .orElseThrow(() -> new RuntimeException("Session not found"));
-                athlete.setSessions(new ArrayList<>(List.of(session)));
+            if (dto.getSessionIds() != null) {
+                List<Session> sessions = new ArrayList<>();
+                for (Integer sessionId : dto.getSessionIds()) {
+                    Session session = sessionDAO.findById(sessionId)
+                            .orElseThrow(() -> new RuntimeException("Session not found"));
+                    sessions.add(session);
+                }
+                athlete.setSessions(sessions);
             }
 
             athleteDAO.save(athlete);