diff --git a/src/api/workout.js b/src/api/workout.js
index 6e9c4b4..1b4133b 100644
--- a/src/api/workout.js
+++ b/src/api/workout.js
@@ -10,6 +10,20 @@ module.exports = function workoutRouter(repo) {
   /** @type {Workout[]} */
   let workouts = [];
 
+  function activeData(id) {
+    const workout = workouts.find(w2 => w2.id === id);
+    if (workout == null) {
+      return {
+        active: false,
+      };
+    }
+
+    return {
+      active: true,
+      state: workout.state,
+    }
+  }
+
   router.get("/", async(req, res) => {
     if (req.query.active === "true") {
       return res.status(200).json(workouts.map(w => ({
@@ -17,7 +31,7 @@ module.exports = function workoutRouter(repo) {
         bike: w.bike,
         program: w.program,
         date: w.date,
-        active: true,
+        ...activeData(w.id),
       })));
     }
 
@@ -25,7 +39,7 @@ module.exports = function workoutRouter(repo) {
       const dbWorkouts = await repo.listWorkouts();
       return res.status(200).json(dbWorkouts.map(w => ({
         ...w,
-        active: workouts.find(w2 => w2.id === w.id) != null,
+        ...activeData(w.id),
       })));
     } catch (err) {
       return res.status(400).json({code: 400, message: err.message || err})      
@@ -35,7 +49,13 @@ module.exports = function workoutRouter(repo) {
   router.get("/:id", async(req, res) => {
     let workout = workouts.find(w => w.id == req.params.id);
     if (workout != null) {
-      return res.status(200).json({id: workout.id, bike: workout.bike, program: workout.program, date: workout.date, active: true})
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program,
+        date: workout.date,
+        ...activeData(w.id),
+      });
     }
 
     try {
@@ -70,7 +90,13 @@ module.exports = function workoutRouter(repo) {
       const workout = await Workout.create(repo, bikeId, programId);
       workouts.push(workout);
 
-      return res.status(200).json({id: workout.id, bike: workout.bike, program: workout.program, date: workout.date});
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program,
+        date: workout.date,
+        ...activeData(workout.id),        
+      });
     } catch (err) {
       return res.status(400).json({code: 400, message: err.message || err});
     }
@@ -86,7 +112,13 @@ module.exports = function workoutRouter(repo) {
       workout = await Workout.continue(repo, req.params.id);
       workouts.push(workout);
 
-      return res.status(200).json({id: workout.id, bike: workout.bike, program: workout.program, date: workout.date});
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program,
+        date: workout.date,
+        ...activeData(w.id),
+      });
     } catch (err) {
       return res.status(400).json({code: 400, message: err.message || err})      
     }
@@ -100,7 +132,13 @@ module.exports = function workoutRouter(repo) {
 
     try {
       await workout.connect();
-      return res.status(200).json({id: workout.id, bike: workout.bike, program: workout.program, date: workout.date});
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program, 
+        date: workout.date,
+        ...activeData(workout.id),      
+      });
     } catch(err) {
       return res.status(500).json({code: 500, message: err.message || err});
     }
@@ -114,7 +152,13 @@ module.exports = function workoutRouter(repo) {
 
     try {
       await workout.start();
-      return res.status(200).json({id: workout.id, bike: workout.bike, program: workout.program, date: workout.date});
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program, 
+        date: workout.date,
+        ...activeData(workout.id),      
+      });
     } catch(err) {
       return res.status(500).json({code: 500, message: err.message || err});
     }
@@ -128,7 +172,13 @@ module.exports = function workoutRouter(repo) {
 
     try {
       await workout.pause();
-      return res.status(200).json({id: workout.id, bike: workout.bike, program: workout.program, date: workout.date});
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program, 
+        date: workout.date,
+        ...activeData(workout.id),      
+      });
     } catch(err) {
       return res.status(500).json({code: 500, message: err.message || err});
     }
@@ -148,7 +198,13 @@ module.exports = function workoutRouter(repo) {
       workouts = workouts.filter(w => w !== workout);
       await workout.destroy();
   
-      return res.status(200).json({id: workout.id, bike: workout.bike, program: workout.program, date: workout.date});  
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program, 
+        date: workout.date,
+        ...activeData(workout.id),      
+      });
     } catch(err) {
       return res.status(500).json({code: 500, message: err.message || err});
     }
@@ -168,15 +224,19 @@ module.exports = function workoutRouter(repo) {
   
       await repo.deleteWorkout(workout);
   
-      return res.status(200).json(workout);
+      return res.status(200).json({
+        id: workout.id,
+        bike: workout.bike,
+        program: workout.program, 
+        date: workout.date,
+        ...activeData(workout.id),      
+      });
     } catch (err) {
       return res.status(500).json({code: 500, message: err.message || err})      
     }
   });
 
   router.ws("/:id/subscribe", (ws, req) => {
-    console.log("HELLO!")
-
     const workout = workouts.find(w => w.id === req.params.id);
     if (workout == null) {
       ws.send(JSON.stringify({error: "workout not found"}));
@@ -184,6 +244,8 @@ module.exports = function workoutRouter(repo) {
     }
 
     workout.listMeasurements().then((list) => {
+      list = list.map(v => {delete v.id; delete v.workoutId; return v});
+
       for (let i = 0; i < list.length; i += 240) {
         ws.send(JSON.stringify({workoutStatusBackfill: list.slice(i, i+240)}));
       }
@@ -192,21 +254,28 @@ module.exports = function workoutRouter(repo) {
       ws.close();
     });
 
-    const handler = (workotuStatus) => {
-      workotuStatus = {...workotuStatus};
-      delete workotuStatus.id;
+    const onWorkoutStatus = (workoutStatus) => {
+      workoutStatus = {...workoutStatus};
+      delete workoutStatus.id;
     
-      ws.send(JSON.stringify({workotuStatus}))
+      ws.send(JSON.stringify({workoutStatus}))
+    }
+    workout.events.on("workoutStatus", onWorkoutStatus);
+
+    const onState = (state) => {    
+      ws.send(JSON.stringify({state}))
     }
+    workout.events.on("state", onState);
 
-    workout.events.on("workoutStatus", handler);
 
     ws.onclose = () => {
-      workout.events.removeListener("workoutStatus", handler);
+      workout.events.removeListener("workoutStatus", onWorkoutStatus);
+      workout.events.removeListener("state", onState);
       ws.removeAllListeners();
     };
 
     ws.send(JSON.stringify({
+      state: workout.state,
       workout: {
         id: workout.id,
         bike: workout.bike,
diff --git a/src/drivers/iconsole.js b/src/drivers/iconsole.js
index 9169023..9bfd338 100644
--- a/src/drivers/iconsole.js
+++ b/src/drivers/iconsole.js
@@ -12,6 +12,7 @@ class IConsoleDriver {
     this.maxLevel = 24;
     this.lastLevel = 18;
     this.workoutStatus = {};
+    this.started = false;
   }
 
   async connect() {
@@ -36,8 +37,17 @@ class IConsoleDriver {
     })
   }
 
+  get state() {
+    return this.client.state;
+  }
+
   async start() {
-    await this.client.start({level: this.lastLevel});
+    if (!this.started) {
+      await this.client.start({level: this.lastLevel});
+      this.started = true;
+    } else {
+      await this.client.resume();
+    }
   }
 
   async pause() {
diff --git a/src/drivers/mock.js b/src/drivers/mock.js
index cfa0da1..f5c0f99 100644
--- a/src/drivers/mock.js
+++ b/src/drivers/mock.js
@@ -18,6 +18,7 @@ class MockDriver {
       watt: 0,
       level: 1,
     };
+    this.state = "disconnected";
 
     this.interval = null;
   }
@@ -27,6 +28,8 @@ class MockDriver {
       this.events.emit("maxLevel", 32);
     })
 
+    this.state = "connected";
+
     return Promise.resolve();
   }
 
@@ -34,6 +37,7 @@ class MockDriver {
     if (this.started) {
       return;
     }
+    this.state = "started";
 
     this.started = true;
     this.interval = setInterval(() => {
@@ -77,10 +81,15 @@ class MockDriver {
   pause() {
     clearInterval(this.interval);
     this.started = false;
+    this.state = "connected";
     
     return Promise.resolve();
   }
 
+  resume() {
+    return this.start();
+  }
+
   stop() {
     this.pause();
     this.workoutStatus = {
@@ -95,6 +104,9 @@ class MockDriver {
       level: 1,
     };
     this.seconds = 0;
+    this.started = false;
+
+    this.state = "disconnected";
 
     return Promise.resolve();
   }
diff --git a/src/systems/workout.js b/src/systems/workout.js
index 42dc93c..2092fdb 100644
--- a/src/systems/workout.js
+++ b/src/systems/workout.js
@@ -29,29 +29,65 @@ class Workout {
     this.date = date;
     this.driver = null;
 
+    this.state = "disconnected";
+
     this.offsetSeconds = 0;
     this.offsets = {};
 
     this.events = new EventEmitter();
+
+    this.events.emit("state", this.state);
   }
 
   async connect() {
+    if (this.state !== "disconnected") {
+      return Promise.resolve();
+    }
+
     this.driver = createDriver(this.bike.driver, this.bike.connect);
     this.driver.events.on("workoutStatus", ws => this.handleworkoutStatus(ws));
 
-    return this.driver.connect();
+    return this.driver.connect().then((v) => {
+      this.state = this.driver.state;
+      this.events.emit("state", this.state);
+      return v;
+    });
   }
 
   start() {
-    return this.driver.start();
+    if (this.state === "started") {
+      return Promise.resolve();
+    }
+
+    return this.driver.start().then((v) => {
+      this.state = this.driver.state;
+      this.events.emit("state", this.state);
+      return v;
+    });
   }
 
   pause() {
-    return this.driver.pause();
+    if (this.state !== "started") {
+      return Promise.resolve();
+    }
+
+    return this.driver.pause().then((v) => {
+      this.state = this.driver.state;
+      this.events.emit("state", this.state);
+      return v;
+    });
   }
 
   stop() {
-    return this.driver.stop();
+    if (this.state === "started") {
+      return Promise.resolve();
+    }
+
+    return this.driver.stop().then((v) => {
+      this.state = this.driver.state;
+      this.events.emit("state", this.state);
+      return v;
+    });
   }
 
   destroy() {
@@ -60,6 +96,8 @@ class Workout {
 
     if (this.driver != null) {
       this.driver.destroy();
+      this.state = this.driver.state;
+      this.events.emit("state", this.state);
       this.driver = null;
     }
   }