diff --git a/src/training-plans/dto/schedule-exercise.dto.ts b/src/training-plans/dto/schedule-exercise.dto.ts
index b9ff154..63085db 100644
--- a/src/training-plans/dto/schedule-exercise.dto.ts
+++ b/src/training-plans/dto/schedule-exercise.dto.ts
@@ -51,11 +51,6 @@ export class CreateScheduleExerciseDto {
   @IsEnum(['exercise', 'rest', 'note'])
   @IsOptional()
   itemType?: ScheduleItemType;
-
-  @ApiProperty({ description: '是否已完成', default: false, required: false })
-  @IsBoolean()
-  @IsOptional()
-  completed?: boolean;
 }
 
 export class UpdateScheduleExerciseDto extends PartialType(CreateScheduleExerciseDto) { }
diff --git a/src/training-plans/models/schedule-exercise.model.ts b/src/training-plans/models/schedule-exercise.model.ts
index 9563ff7..6ea24f9 100644
--- a/src/training-plans/models/schedule-exercise.model.ts
+++ b/src/training-plans/models/schedule-exercise.model.ts
@@ -60,9 +60,6 @@ export class ScheduleExercise extends Model {
   })
   declare itemType: ScheduleItemType;
 
-  @Column({ type: DataType.BOOLEAN, defaultValue: false, comment: '是否已完成' })
-  declare completed: boolean;
-
   @Column({ type: DataType.INTEGER, allowNull: false, comment: '排序顺序' })
   declare sortOrder: number;
 
diff --git a/src/training-plans/schedule-exercise.service.ts b/src/training-plans/schedule-exercise.service.ts
index 4cf3b00..86e0dcd 100644
--- a/src/training-plans/schedule-exercise.service.ts
+++ b/src/training-plans/schedule-exercise.service.ts
@@ -12,7 +12,7 @@ import { ActivityLogsService } from '../activity-logs/activity-logs.service';
 import { ActivityActionType, ActivityEntityType } from '../activity-logs/models/activity-log.model';
 import { Logger as WinstonLogger } from 'winston';
 import { WINSTON_MODULE_PROVIDER } from 'nest-winston';
-import { Op, Transaction } from 'sequelize';
+import { Op } from 'sequelize';
 
 @Injectable()
 export class ScheduleExerciseService {
@@ -79,7 +79,6 @@ export class ScheduleExerciseService {
       restSec: dto.restSec,
       note: dto.note || '',
       itemType: dto.itemType || 'exercise',
-      completed: dto.completed || false,
       sortOrder,
     });
 
@@ -182,7 +181,6 @@ export class ScheduleExerciseService {
     if (dto.restSec !== undefined) exercise.restSec = dto.restSec;
     if (dto.note !== undefined) exercise.note = dto.note || '';
     if (dto.itemType !== undefined) exercise.itemType = dto.itemType;
-    if (dto.completed !== undefined) exercise.completed = dto.completed;
 
     await exercise.save();
 
diff --git a/src/workouts/workouts.service.ts b/src/workouts/workouts.service.ts
index eab4e78..33d2be4 100644
--- a/src/workouts/workouts.service.ts
+++ b/src/workouts/workouts.service.ts
@@ -109,7 +109,11 @@ export class WorkoutsService {
     });
 
     if (!activeTrainingPlan) {
-      throw new NotFoundException('请先激活一个训练计划');
+      this.winstonLogger.info(`今日没有激活的训练计划`, {
+        context: 'WorkoutsService',
+        userId,
+      });
+      return null;
     }
 
     // 创建今日训练会话
@@ -352,28 +356,44 @@ export class WorkoutsService {
    * 删除训练会话
    */
   async deleteWorkoutSession(userId: string, sessionId: string) {
-    const [count] = await this.workoutSessionModel.update(
-      { deleted: true },
-      { where: { id: sessionId, userId, deleted: false } }
-    );
+    const transaction = await this.workoutSessionModel.sequelize?.transaction();
+    if (!transaction) throw new Error('Failed to start transaction');
 
-    if (count === 0) {
-      throw new NotFoundException('训练会话不存在');
+    try {
+      const [count] = await this.workoutSessionModel.update(
+        { deleted: true },
+        { where: { id: sessionId, userId, deleted: false }, transaction }
+      );
+
+      if (count === 0) {
+        throw new NotFoundException('训练会话不存在');
+      }
+
+      // 同时删除关联的训练动作
+      await this.workoutExerciseModel.update(
+        { deleted: true },
+        { where: { workoutSessionId: sessionId, userId, deleted: false }, transaction }
+      );
+
+      await transaction.commit();
+
+      this.winstonLogger.info(`删除训练会话 ${sessionId}`, {
+        context: 'WorkoutsService',
+        userId,
+        sessionId,
+      });
+
+      return { success: true };
+    } catch (error) {
+      await transaction.rollback();
+      this.winstonLogger.error(`删除训练会话失败 ${sessionId}`, {
+        context: 'WorkoutsService',
+        userId,
+        sessionId,
+        error,
+      });
+      throw error;
     }
-
-    // 同时删除关联的训练动作
-    await this.workoutExerciseModel.update(
-      { deleted: true },
-      { where: { workoutSessionId: sessionId, userId, deleted: false } }
-    );
-
-    this.winstonLogger.info(`删除训练会话 ${sessionId}`, {
-      context: 'WorkoutsService',
-      userId,
-      sessionId,
-    });
-
-    return { success: true };
   }
 
   // ==================== 训练动作管理 ====================