diff --git a/.gitignore b/.gitignore
index 9c07d4a..e051c58 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 *.class
 *.log
+.idea
+project/target
+target
diff --git a/README b/README
new file mode 100644
index 0000000..49c3c73
--- /dev/null
+++ b/README
@@ -0,0 +1,6 @@
+Workout manager
+=================================
+
+Defines and schedules workouts
+
+
diff --git a/build.sbt b/build.sbt
new file mode 100644
index 0000000..04d21d3
--- /dev/null
+++ b/build.sbt
@@ -0,0 +1,9 @@
+name := "workouts"
+
+version := "0.1"
+
+scalaVersion := "2.12.4"
+
+libraryDependencies ++= Seq(
+  "org.scalatest" %% "scalatest" % "3.0.5" % "test"
+)
\ No newline at end of file
diff --git a/project/build.properties b/project/build.properties
new file mode 100644
index 0000000..826c0bd
--- /dev/null
+++ b/project/build.properties
@@ -0,0 +1 @@
+sbt.version = 0.13.16
\ No newline at end of file
diff --git a/project/plugins.sbt b/project/plugins.sbt
new file mode 100644
index 0000000..3a8b7aa
--- /dev/null
+++ b/project/plugins.sbt
@@ -0,0 +1 @@
+addSbtPlugin("org.scalariform" % "sbt-scalariform" % "1.8.2")
diff --git a/src/main/scala/com.github.mgifos.workouts/model/Duration.scala b/src/main/scala/com.github.mgifos.workouts/model/Duration.scala
new file mode 100644
index 0000000..48d4e2f
--- /dev/null
+++ b/src/main/scala/com.github.mgifos.workouts/model/Duration.scala
@@ -0,0 +1,26 @@
+package com.github.mgifos.workouts.model
+
+import com.github.mgifos.workouts.model.DistanceUnits.DistanceUnit
+
+sealed trait Duration
+
+case class DistanceDuration(distance: Float, unit: DistanceUnit) extends Duration
+
+object DistanceUnits extends Enumeration {
+  type DistanceUnit = Value
+  val km, mi, m = Value
+}
+case class TimeDuration(hours: Int = 0, minutes: Int = 0, seconds: Int = 0) extends Duration
+
+object Duration {
+
+  private val DistanceRx = """^(\d+([\.]\d+)?)\s*(km|mi|m)$""".r
+  private val MinutesRx = """^(\d{1,3}):(\d{2})$""".r
+
+  def parse(x: String): Duration = x match {
+    case DistanceRx(quantity, _, unit) => DistanceDuration(quantity.toFloat, DistanceUnits.withName(unit))
+    case MinutesRx(minutes, seconds) => TimeDuration(minutes = minutes.toInt, seconds = seconds.toInt)
+    case _ => throw new IllegalArgumentException(s"Duration cannot be parsed $x")
+  }
+}
+
diff --git a/src/main/scala/com.github.mgifos.workouts/model/Step.scala b/src/main/scala/com.github.mgifos.workouts/model/Step.scala
new file mode 100644
index 0000000..5448f44
--- /dev/null
+++ b/src/main/scala/com.github.mgifos.workouts/model/Step.scala
@@ -0,0 +1,58 @@
+package com.github.mgifos.workouts.model
+
+sealed trait Step {
+  def `type`: String
+}
+
+abstract class DurationStep(stepType: String, duration: Duration, target: Option[Target] = None) extends Step {
+  override def `type` = stepType
+}
+
+case class WarmupStep(duration: Duration, target: Option[Target] = None) extends DurationStep("warmup", duration)
+
+case class RunStep(duration: Duration, target: Option[Target] = None) extends DurationStep("run", duration)
+
+case class RecoverStep(duration: Duration, target: Option[Target] = None) extends DurationStep("recover", duration)
+
+case class CooldownStep(duration: Duration, target: Option[Target] = None) extends DurationStep("cooldown", duration)
+
+case class RepeatStep(count: Int, definition: Seq[DurationStep]) extends Step {
+  override def `type` = "repeat"
+}
+
+object Step {
+
+  private val StepRx = """^(-\s\w*:\s.*)((\n\s{1,}-\s.*)*)$""".r
+  private val StepHeader = """^\s*-\s*(\w*):(.*)$""".r
+  private val ParamsRx = """^([\w\.:\s]+)\s*(@(.*))?$""".r
+
+  def parse(x: String): Step = x match {
+    case StepRx(header, subSteps, _) if subSteps.nonEmpty => header match {
+      case StepHeader(name, params) =>
+        assert(name == "repeat", "must be 'repeat' if contains sub-steps")
+        RepeatStep(params.trim.toInt, subSteps.trim.lines.toList.map(parseDurationStep))
+      case _ => throw new IllegalArgumentException(s"Cannot parse repeat step $header")
+    }
+    case StepRx(header, "", null) => parseDurationStep(header)
+    case _ => throw new IllegalArgumentException(s"Cannot parse step:$x")
+  }
+
+  private def parseDurationStep(x: String): DurationStep = x match {
+    case StepHeader(name, params) => name match {
+      case "warmup" => WarmupStep.tupled(expect(params))
+      case "run" => RunStep.tupled(expect(params))
+      case "recover" => RecoverStep.tupled(expect(params))
+      case "cooldown" => CooldownStep.tupled(expect(params))
+      case _ => throw new IllegalArgumentException(s"Duration step type was expected, $name")
+    }
+    case _ => throw new IllegalArgumentException(s"Cannot parse step type $x")
+  }
+
+  private def expect(x: String): (Duration, Option[Target]) = x match {
+    case ParamsRx(duration, _, target) =>
+      val maybeTarget = Option(target).filter(_.trim.nonEmpty).map(Target.parse)
+      (Duration.parse(duration.trim), maybeTarget)
+    case _ => throw new IllegalArgumentException(s"Cannot parse step parameters $x")
+  }
+}
+
diff --git a/src/main/scala/com.github.mgifos.workouts/model/Target.scala b/src/main/scala/com.github.mgifos.workouts/model/Target.scala
new file mode 100644
index 0000000..50f7f30
--- /dev/null
+++ b/src/main/scala/com.github.mgifos.workouts/model/Target.scala
@@ -0,0 +1,22 @@
+package com.github.mgifos.workouts.model
+
+sealed trait Target
+
+case class HrZoneTarget(zone: Int) extends Target
+case class PaceTarget(from: Pace, to: Pace) extends Target
+
+case class Pace(exp: String) {
+  def minutes: Int = exp.trim.takeWhile(_ != ':').toInt
+  def seconds: Int = exp.trim.split(":").last.toInt
+}
+
+object Target {
+  private val HrZoneRx = """^z(\d)$""".r
+  private val PaceRangeRx = """^(\d{1,2}:\d{2})\s*-\s*(\d{1,2}:\d{2})$""".r
+
+  def parse(x: String): Target = x.trim match {
+    case HrZoneRx(zone) => HrZoneTarget(zone.toInt)
+    case PaceRangeRx(from, to) => PaceTarget(Pace(from), Pace(to))
+    case _ => throw new IllegalArgumentException(s"Unknown target specification: $x")
+  }
+}
\ No newline at end of file
diff --git a/src/main/scala/com.github.mgifos.workouts/model/Workout.scala b/src/main/scala/com.github.mgifos.workouts/model/Workout.scala
new file mode 100644
index 0000000..d39a0ad
--- /dev/null
+++ b/src/main/scala/com.github.mgifos.workouts/model/Workout.scala
@@ -0,0 +1,26 @@
+package com.github.mgifos.workouts.model
+
+case class Workout(name: String, steps: Seq[Step] = Nil) {
+  def withStep(step: Step): Workout = Workout(name, steps :+ step)
+}
+
+object Workout {
+
+  private val WorkoutName = """^workout:\s([\w-]+)((\n\s*-\s[a-z]+:.*)*)$""".r
+  private val NextStepRx = """^((-\s\w*:\s.*)((\n\s{1,}-\s.*)*))(([\s].*)*)$""".r
+
+  def parse(x: String) = {
+    def loop(w: Workout, steps: String): Workout = steps match {
+      case NextStepRx(next, _, _, _, rest, _) =>
+        val newWorkout = w.withStep(Step.parse(next.trim))
+        if (rest.trim.isEmpty) newWorkout
+        else loop(newWorkout, rest.trim)
+      case _ => throw new IllegalArgumentException(s"Input string cannot be parsed to Workout: $steps")
+    }
+    x match {
+      case WorkoutName(name, steps, _) =>
+        loop(Workout(name), steps.trim)
+      case _ => throw new IllegalArgumentException(s"Input string cannot be parsed to Workout: $x")
+    }
+  }
+}
diff --git a/src/test/scala/com/github/mgifos/workouts/model/DurationSpec.scala b/src/test/scala/com/github/mgifos/workouts/model/DurationSpec.scala
new file mode 100644
index 0000000..4e6a572
--- /dev/null
+++ b/src/test/scala/com/github/mgifos/workouts/model/DurationSpec.scala
@@ -0,0 +1,30 @@
+package com.github.mgifos.workouts.model
+
+import org.scalatest.{ FlatSpec, Matchers }
+import com.github.mgifos.workouts.model.DistanceUnits._
+
+class DurationSpec extends FlatSpec with Matchers {
+
+  "Duration" should "parse correctly" in {
+
+    a[IllegalArgumentException] should be thrownBy Duration.parse("")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("5")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("5k")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("5 k")
+    a[IllegalArgumentException] should be thrownBy Duration.parse(":")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("1:")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("1:0")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("01: 00")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("00")
+    a[IllegalArgumentException] should be thrownBy Duration.parse(":00")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("1234:00")
+    a[IllegalArgumentException] should be thrownBy Duration.parse("2:40:15")
+
+    Duration.parse("5km") should be(DistanceDuration(5, km))
+    Duration.parse("10 mi") should be(DistanceDuration(10, mi))
+    Duration.parse("7.5m") should be(DistanceDuration(7.5f, m))
+
+    Duration.parse("1:00") should be(TimeDuration(minutes = 1))
+    Duration.parse("123:00") should be(TimeDuration(minutes = 123))
+  }
+}
diff --git a/src/test/scala/com/github/mgifos/workouts/model/StepSpec.scala b/src/test/scala/com/github/mgifos/workouts/model/StepSpec.scala
new file mode 100644
index 0000000..8f75398
--- /dev/null
+++ b/src/test/scala/com/github/mgifos/workouts/model/StepSpec.scala
@@ -0,0 +1,21 @@
+package com.github.mgifos.workouts.model
+
+import com.github.mgifos.workouts.model.DistanceUnits._
+import org.scalatest.{ FlatSpec, Matchers }
+
+class StepSpec extends FlatSpec with Matchers {
+
+  "Step" should "parse correctly" in {
+
+    a[IllegalArgumentException] should be thrownBy Step.parse("")
+    a[AssertionError] should be thrownBy Step.parse("- warmup: 5km\n  - run: 10km\n  - recover: 100m")
+
+    Step.parse("- warmup: 5km") should be(WarmupStep(DistanceDuration(5, km)))
+    Step.parse("- run: 2km @ 5:00-4:50") should be(RunStep(DistanceDuration(2, km), Some(PaceTarget(Pace("5:00"), Pace("4:50")))))
+    Step.parse("- recover: 500m @z2") should be(RecoverStep(DistanceDuration(500, m), Some(HrZoneTarget(2))))
+    Step.parse("- cooldown: 05:00") should be(CooldownStep(TimeDuration(minutes = 5)))
+    Step.parse("- repeat: 3\n  - run: 10km\n  - recover: 100m") should be(RepeatStep(3, List(
+      RunStep(DistanceDuration(10, km)),
+      RecoverStep(DistanceDuration(100, m)))))
+  }
+}
diff --git a/src/test/scala/com/github/mgifos/workouts/model/TargetSpec.scala b/src/test/scala/com/github/mgifos/workouts/model/TargetSpec.scala
new file mode 100644
index 0000000..2c18e07
--- /dev/null
+++ b/src/test/scala/com/github/mgifos/workouts/model/TargetSpec.scala
@@ -0,0 +1,19 @@
+package com.github.mgifos.workouts.model
+
+import org.scalatest.{ FlatSpec, Matchers }
+
+class TargetSpec extends FlatSpec with Matchers {
+
+  "Target" should "parse correctly" in {
+
+    a[IllegalArgumentException] should be thrownBy Target.parse("")
+
+    Target.parse("z1") should be(HrZoneTarget(1))
+    Target.parse("z2") should be(HrZoneTarget(2))
+
+    val paceTarget = Target.parse("5:20-04:30").asInstanceOf[PaceTarget]
+    paceTarget.from.minutes should be(5)
+    paceTarget.to.seconds should be(30)
+    paceTarget should be(PaceTarget(Pace("5:20"), Pace("04:30")))
+  }
+}
diff --git a/src/test/scala/com/github/mgifos/workouts/model/WorkoutSpec.scala b/src/test/scala/com/github/mgifos/workouts/model/WorkoutSpec.scala
new file mode 100644
index 0000000..914cd6d
--- /dev/null
+++ b/src/test/scala/com/github/mgifos/workouts/model/WorkoutSpec.scala
@@ -0,0 +1,32 @@
+package com.github.mgifos.workouts.model
+
+import org.scalatest.{ FlatSpec, Matchers }
+import com.github.mgifos.workouts.model.DistanceUnits._
+
+class WorkoutSpec extends FlatSpec with Matchers {
+
+  "Workout" should "parse correctly" in {
+    a[IllegalArgumentException] should be thrownBy Workout.parse("")
+    a[IllegalArgumentException] should be thrownBy Workout.parse("workout")
+    a[IllegalArgumentException] should be thrownBy Workout.parse("workout:")
+    a[IllegalArgumentException] should be thrownBy Workout.parse("workout: !")
+    a[IllegalArgumentException] should be thrownBy Workout.parse("workout run-fast")
+    a[IllegalArgumentException] should be thrownBy Workout.parse(" workout: run-fast")
+    /*
+    workout: run-fast
+    - warmup: 10:00
+    - repeat: 2
+      - run: 1500m @ z4
+      - recover: 01:30 @ z2
+    - cooldown: 5:00
+     */
+    val testWO = "workout: run-fast\n- warmup: 10:00\n- repeat: 2\n  - run: 1500m @ z4\n  - recover: 01:30 @ z2\n- cooldown: 5:00"
+    Workout.parse(testWO) should be(
+      Workout("run-fast", Seq(
+        WarmupStep(TimeDuration(minutes = 10)),
+        RepeatStep(2, Seq(
+          RunStep(DistanceDuration(1500, m), Some(HrZoneTarget(4))),
+          RecoverStep(TimeDuration(0, 1, 30), Some(HrZoneTarget(2))))),
+        CooldownStep(TimeDuration(minutes = 5)))))
+  }
+}