diff --git a/docs/exercises-seed.sql b/docs/exercises-seed.sql
index d29d049..ee5b10c 100644
--- a/docs/exercises-seed.sql
+++ b/docs/exercises-seed.sql
@@ -2,6 +2,8 @@
 -- 说明：表由 Sequelize 同步创建（t_exercise_categories / t_exercises）
 -- 若要幂等导入，使用 INSERT ... ON DUPLICATE KEY UPDATE
 
+USE `db-plates`;
+
 START TRANSACTION;
 
 -- 分类
diff --git a/src/training-plans/dto/training-plan.dto.ts b/src/training-plans/dto/training-plan.dto.ts
index 8c0f2be..4830570 100644
--- a/src/training-plans/dto/training-plan.dto.ts
+++ b/src/training-plans/dto/training-plan.dto.ts
@@ -1,4 +1,4 @@
-import { ApiProperty } from '@nestjs/swagger';
+import { ApiProperty, PartialType } from '@nestjs/swagger';
 import { IsArray, IsDateString, IsEnum, IsInt, IsNotEmpty, IsNumber, IsOptional, IsString, Max, Min, ValidateIf } from 'class-validator';
 import { PlanGoal, PlanMode } from '../models/training-plan.model';
 
@@ -48,4 +48,6 @@ export class TrainingPlanSummaryDto {
   @ApiProperty() goal: string;
 }
 
+export class UpdateTrainingPlanDto extends PartialType(CreateTrainingPlanDto) {}
+
 
diff --git a/src/training-plans/models/training-plan.model.ts b/src/training-plans/models/training-plan.model.ts
index fc16907..ea5898a 100644
--- a/src/training-plans/models/training-plan.model.ts
+++ b/src/training-plans/models/training-plan.model.ts
@@ -15,6 +15,10 @@ export class TrainingPlan extends Model {
   })
   declare id: string;
 
+
+  @Column({ type: DataType.BOOLEAN, defaultValue: false, comment: '是否激活' })
+  declare isActive: boolean;
+
   @Column({ type: DataType.STRING, allowNull: false })
   declare userId: string;
 
diff --git a/src/training-plans/training-plans.controller.ts b/src/training-plans/training-plans.controller.ts
index c3f0216..6b5939c 100644
--- a/src/training-plans/training-plans.controller.ts
+++ b/src/training-plans/training-plans.controller.ts
@@ -1,7 +1,7 @@
 import { Body, Controller, Delete, Get, Param, Post, Query, UseGuards } from '@nestjs/common';
 import { ApiBody, ApiOperation, ApiParam, ApiTags } from '@nestjs/swagger';
 import { TrainingPlansService } from './training-plans.service';
-import { CreateTrainingPlanDto } from './dto/training-plan.dto';
+import { CreateTrainingPlanDto, UpdateTrainingPlanDto } from './dto/training-plan.dto';
 import { JwtAuthGuard } from '../common/guards/jwt-auth.guard';
 import { CurrentUser } from '../common/decorators/current-user.decorator';
 import { AccessTokenPayload } from '../users/services/apple-auth.service';
@@ -19,6 +19,18 @@ export class TrainingPlansController {
     return this.service.create(user.sub, dto);
   }
 
+  @Post(':id/update')
+  @ApiOperation({ summary: '更新训练计划' })
+  @ApiParam({ name: 'id' })
+  @ApiBody({ type: UpdateTrainingPlanDto })
+  async update(
+    @CurrentUser() user: AccessTokenPayload,
+    @Param('id') id: string,
+    @Body() dto: UpdateTrainingPlanDto,
+  ) {
+    return this.service.update(user.sub, id, dto);
+  }
+
   @Delete(':id')
   @ApiOperation({ summary: '删除训练计划' })
   @ApiParam({ name: 'id' })
@@ -42,6 +54,13 @@ export class TrainingPlansController {
   async detail(@CurrentUser() user: AccessTokenPayload, @Param('id') id: string) {
     return this.service.detail(user.sub, id);
   }
+
+  @Post(':id/activate')
+  @ApiOperation({ summary: '激活训练计划' })
+  @ApiParam({ name: 'id' })
+  async activate(@CurrentUser() user: AccessTokenPayload, @Param('id') id: string) {
+    return this.service.activate(user.sub, id);
+  }
 }
 
 
diff --git a/src/training-plans/training-plans.service.ts b/src/training-plans/training-plans.service.ts
index 8047418..090fe31 100644
--- a/src/training-plans/training-plans.service.ts
+++ b/src/training-plans/training-plans.service.ts
@@ -1,12 +1,15 @@
-import { Injectable, NotFoundException } from '@nestjs/common';
+import { Inject, Injectable, NotFoundException } from '@nestjs/common';
 import { InjectModel } from '@nestjs/sequelize';
 import { TrainingPlan } from './models/training-plan.model';
-import { CreateTrainingPlanDto } from './dto/training-plan.dto';
+import { CreateTrainingPlanDto, UpdateTrainingPlanDto } from './dto/training-plan.dto';
 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';
 
 @Injectable()
 export class TrainingPlansService {
+  @Inject(WINSTON_MODULE_PROVIDER) private readonly winstonLogger: WinstonLogger;
   constructor(
     @InjectModel(TrainingPlan)
     private trainingPlanModel: typeof TrainingPlan,
@@ -16,6 +19,10 @@ export class TrainingPlansService {
   async create(userId: string, dto: CreateTrainingPlanDto) {
     const id = `plan_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`;
     const createdAt = new Date();
+
+    // 检查用户是否有其他激活的训练计划
+    const activePlans = await this.trainingPlanModel.findAll({ where: { userId, isActive: true, deleted: false } });
+
     const plan = await this.trainingPlanModel.create({
       id,
       userId,
@@ -28,6 +35,12 @@ export class TrainingPlansService {
       goal: dto.goal,
       startWeightKg: dto.startWeightKg ?? null,
       preferredTimeOfDay: dto.preferredTimeOfDay ?? '',
+      isActive: activePlans.length === 0,
+    });
+    this.winstonLogger.info(`create plan ${id} for user ${userId} success`, {
+      context: 'TrainingPlansService',
+      userId,
+      id,
     });
     await this.activityLogsService.record({
       userId,
@@ -36,6 +49,11 @@ export class TrainingPlansService {
       entityId: plan.id,
       changes: plan.toJSON(),
     });
+    this.winstonLogger.info(`create plan ${id} for user ${userId} success`, {
+      context: 'TrainingPlansService',
+      userId,
+      id,
+    });
     return plan.toJSON();
   }
 
@@ -44,6 +62,11 @@ export class TrainingPlansService {
       { deleted: true },
       { where: { id, userId, deleted: false } }
     );
+    this.winstonLogger.info(`remove plan ${id} for user ${userId}`, {
+      context: 'TrainingPlansService',
+      userId,
+      id,
+    });
     if (count > 0) {
       await this.activityLogsService.record({
         userId,
@@ -52,6 +75,11 @@ export class TrainingPlansService {
         entityId: id,
         changes: null,
       });
+      this.winstonLogger.info(`remove plan ${id} for user ${userId} success`, {
+        context: 'TrainingPlansService',
+        userId,
+        id,
+      });
     }
     return { success: count > 0 };
   }
@@ -81,10 +109,96 @@ export class TrainingPlansService {
   }
 
   async detail(userId: string, id: string) {
-    const plan = await this.trainingPlanModel.findOne({ where: { id, userId } });
+    const plan = await this.trainingPlanModel.findOne({ where: { id, userId, deleted: false } });
     if (!plan) throw new NotFoundException('训练计划不存在');
     return plan.toJSON();
   }
+
+  async update(userId: string, id: string, dto: UpdateTrainingPlanDto) {
+    const plan = await this.trainingPlanModel.findOne({ where: { id, userId, deleted: false } });
+    if (!plan) throw new NotFoundException('训练计划不存在');
+
+    this.winstonLogger.info(`update plan ${id} for user ${userId}`, {
+      context: 'TrainingPlansService',
+      userId,
+      id,
+    });
+
+    const before = plan.toJSON();
+
+    if (typeof dto.name !== 'undefined') plan.name = dto.name ?? '';
+    if (typeof dto.startDate !== 'undefined') plan.startDate = new Date(dto.startDate);
+    if (typeof dto.mode !== 'undefined') plan.mode = dto.mode;
+    if (typeof dto.daysOfWeek !== 'undefined') plan.daysOfWeek = dto.daysOfWeek as number[];
+    if (typeof dto.sessionsPerWeek !== 'undefined') plan.sessionsPerWeek = dto.sessionsPerWeek as number;
+    if (typeof dto.goal !== 'undefined') plan.goal = dto.goal;
+    if (typeof dto.startWeightKg !== 'undefined') plan.startWeightKg = dto.startWeightKg ?? null;
+    if (typeof dto.preferredTimeOfDay !== 'undefined') plan.preferredTimeOfDay = dto.preferredTimeOfDay ?? '';
+
+    await plan.save();
+
+    const after = plan.toJSON();
+    const changedKeys = Object.keys(after).filter((key) => (before as any)[key] !== (after as any)[key]);
+    const changes: Record<string, any> = {};
+    for (const key of changedKeys) {
+      changes[key] = { before: (before as any)[key], after: (after as any)[key] };
+    }
+
+    await this.activityLogsService.record({
+      userId,
+      entityType: ActivityEntityType.TRAINING_PLAN,
+      action: ActivityActionType.UPDATE,
+      entityId: id,
+      changes,
+    });
+
+    this.winstonLogger.info(`update plan ${id} for user ${userId} success`, {
+      context: 'TrainingPlansService',
+      userId,
+      id,
+    });
+
+    return after;
+  }
+
+  async activate(userId: string, id: string) {
+    const plan = await this.trainingPlanModel.findOne({ where: { id, userId, deleted: false } });
+    if (!plan) throw new NotFoundException('训练计划不存在');
+
+    this.winstonLogger.info(`activate plan ${id} for user ${userId}`, {
+      context: 'TrainingPlansService',
+      userId,
+      id,
+    });
+
+    const transaction = await this.trainingPlanModel.sequelize?.transaction();
+    if (!transaction) throw new Error('Failed to start transaction');
+    try {
+      // 用户是否有其他激活的训练计划
+      const activePlan = await this.trainingPlanModel.findAll({ where: { userId, isActive: true, deleted: false }, transaction });
+      if (activePlan.length > 0) {
+        for (const p of activePlan) {
+          p.isActive = false;
+          await p.save({ transaction });
+        }
+      }
+
+      plan.isActive = true;
+      await plan.save({ transaction });
+      await transaction.commit();
+
+      this.winstonLogger.info(`activate plan ${id} for user ${userId} success`, {
+        context: 'TrainingPlansService',
+        userId,
+        id,
+      });
+
+      return plan.toJSON();
+    } catch (error) {
+      await transaction.rollback();
+      throw error;
+    }
+  }
 }