diff --git a/fitnesstrax/app/src/components/day.rs b/fitnesstrax/app/src/components/day.rs
index d8d547f..db0edf3 100644
--- a/fitnesstrax/app/src/components/day.rs
+++ b/fitnesstrax/app/src/components/day.rs
@@ -18,6 +18,7 @@ You should have received a copy of the GNU General Public License along with Fit
 // use ft_core::TraxRecord;
 use crate::{
     components::{steps_editor, weight_field, ActionGroup, Steps, WeightLabel},
+    types::WeightFormatter,
     view_models::DayDetailViewModel,
 };
 use glib::Object;
@@ -162,7 +163,7 @@ impl DayDetail {
         let top_row = gtk::Box::builder()
             .orientation(gtk::Orientation::Horizontal)
             .build();
-        let weight_view = WeightLabel::new(view_model.weight());
+        let weight_view = WeightLabel::new(view_model.weight().map(WeightFormatter::from));
         top_row.append(&weight_view.widget());
 
         let steps_view = Steps::new(view_model.steps());
@@ -293,10 +294,10 @@ impl DayEdit {
             .orientation(gtk::Orientation::Horizontal)
             .build();
         top_row.append(
-            &weight_field(view_model.weight(), {
+            &weight_field(view_model.weight().map(WeightFormatter::from), {
                 let view_model = view_model.clone();
                 move |w| match w {
-                    Some(w) => view_model.set_weight(w),
+                    Some(w) => view_model.set_weight(*w),
                     None => eprintln!("have not implemented record delete"),
                 }
             })
diff --git a/fitnesstrax/app/src/view_models/day_detail.rs b/fitnesstrax/app/src/view_models/day_detail.rs
index 46aee59..2cd7224 100644
--- a/fitnesstrax/app/src/view_models/day_detail.rs
+++ b/fitnesstrax/app/src/view_models/day_detail.rs
@@ -14,13 +14,11 @@ General Public License for more details.
 You should have received a copy of the GNU General Public License along with FitnessTrax. If not, see <https://www.gnu.org/licenses/>.
 */
 
-use crate::{
-    app::{ReadError, RecordProvider, WriteError},
-    types::WeightFormatter,
-};
+use crate::app::{ReadError, RecordProvider, WriteError};
 use chrono::NaiveDate;
+use dimensioned::si;
 use emseries::{Record, RecordId, Recordable};
-use ft_core::TraxRecord;
+use ft_core::{RecordType, TimeDistance, TimeDistanceWorkoutType, TraxRecord};
 use std::{
     collections::HashMap,
     ops::Deref,
@@ -79,6 +77,17 @@ impl<T: Clone + emseries::Recordable> Deref for RecordState<T> {
     }
 }
 
+impl<T: Clone + emseries::Recordable> std::ops::DerefMut for RecordState<T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        match self {
+            RecordState::Original(ref mut r) => &mut r.data,
+            RecordState::New(ref mut r) => r,
+            RecordState::Updated(ref mut r) => &mut r.data,
+            RecordState::Deleted(ref mut r) => &mut r.data,
+        }
+    }
+}
+
 #[derive(Clone)]
 pub struct DayDetailViewModel {
     provider: Arc<dyn RecordProvider>,
@@ -132,22 +141,20 @@ impl DayDetailViewModel {
         })
     }
 
-    pub fn weight(&self) -> Option<WeightFormatter> {
-        (*self.weight.read().unwrap())
-            .as_ref()
-            .map(|w| WeightFormatter::from(w.weight))
+    pub fn weight(&self) -> Option<si::Kilogram<f64>> {
+        (*self.weight.read().unwrap()).as_ref().map(|w| (*w).weight)
     }
 
-    pub fn set_weight(&self, new_weight: WeightFormatter) {
+    pub fn set_weight(&self, new_weight: si::Kilogram<f64>) {
         let mut record = self.weight.write().unwrap();
         let new_record = match *record {
             Some(ref rstate) => rstate.clone().with_value(ft_core::Weight {
                 date: self.date,
-                weight: *new_weight,
+                weight: new_weight,
             }),
             None => RecordState::New(ft_core::Weight {
                 date: self.date,
-                weight: *new_weight,
+                weight: new_weight,
             }),
         };
         *record = Some(new_record);
@@ -172,72 +179,163 @@ impl DayDetailViewModel {
         *record = Some(new_record);
     }
 
+    pub fn new_time_distance(&self, type_: TimeDistanceWorkoutType) -> Record<TimeDistance> {
+        let id = RecordId::default();
+        let workout = TimeDistance {
+            datetime: chrono::Local::now().into(),
+            distance: None,
+            duration: None,
+            comments: None,
+        };
+        let tr = TraxRecord::from_time_distance(type_, workout.clone());
+        self.records
+            .write()
+            .unwrap()
+            .insert(id.clone(), RecordState::New(tr));
+        println!(
+            "records after new_time_distance: {:?}",
+            self.records.read().unwrap()
+        );
+        Record { id, data: workout }
+    }
+
+    pub fn update_time_distance(&self, workout: Record<TimeDistance>) {
+        let id = workout.id.clone();
+        let data = workout.data.clone();
+
+        self.records
+            .write()
+            .unwrap()
+            .entry(id)
+            .and_modify(|r| match **r {
+                TraxRecord::BikeRide(ref mut v) => *v = data,
+                TraxRecord::Row(ref mut v) => *v = data,
+                TraxRecord::Run(ref mut v) => *v = data,
+                TraxRecord::Swim(ref mut v) => *v = data,
+                TraxRecord::Walk(ref mut v) => *v = data,
+                _ => {}
+            });
+    }
+
+    pub fn time_distance_records(&self, type_: RecordType) -> Vec<Record<TimeDistance>> {
+        unimplemented!("time_distance_records")
+    }
+
+    pub fn time_distance_summary(
+        &self,
+        type_: TimeDistanceWorkoutType,
+    ) -> (si::Meter<f64>, si::Second<f64>) {
+        self.records
+            .read()
+            .unwrap()
+            .iter()
+            .filter(|(_, workout_state)| workout_state.is_time_distance_type(type_))
+            .filter_map(|(id, record_state)| match **record_state {
+                TraxRecord::BikeRide(ref workout)
+                | TraxRecord::Row(ref workout)
+                | TraxRecord::Run(ref workout)
+                | TraxRecord::Swim(ref workout)
+                | TraxRecord::Walk(ref workout) => Some(workout),
+                _ => None,
+            })
+            .fold((0. * si::M, 0. * si::S), |(distance, duration), workout| {
+                println!("folding workout: {:?}", workout);
+                match (workout.distance, workout.duration) {
+                    (Some(distance_), Some(duration_)) => {
+                        (distance + distance_, duration + duration_)
+                    }
+                    (Some(distance_), None) => (distance + distance_, duration),
+                    (None, Some(duration_)) => (distance, duration + duration_),
+                    (None, None) => (distance, duration),
+                }
+            })
+    }
+
+    fn get_record(&self, id: &RecordId) -> Option<Record<TraxRecord>> {
+        let record_set = self.records.read().unwrap();
+        match record_set.get(&id) {
+            Some(record) => Some(Record {
+                id: id.clone(),
+                data: (**record).clone(),
+            }),
+            None => None,
+        }
+    }
+
+    pub fn remove_record(&self, id: RecordId) {
+        unimplemented!("remove_record")
+    }
+
     pub fn save(&self) {
         glib::spawn_future({
             let s = self.clone();
-            async move {
-                let weight_record = s.weight.read().unwrap().clone();
-                match weight_record {
-                    Some(RecordState::New(data)) => {
-                        let _ = s.provider.put_record(TraxRecord::Weight(data)).await;
-                    }
-                    Some(RecordState::Original(_)) => {}
-                    Some(RecordState::Updated(weight)) => {
-                        let _ = s
-                            .provider
-                            .update_record(Record {
-                                id: weight.id,
-                                data: TraxRecord::Weight(weight.data),
-                            })
-                            .await;
-                    }
-                    Some(RecordState::Deleted(_)) => {}
-                    None => {}
-                }
-
-                let steps_record = s.steps.read().unwrap().clone();
-                match steps_record {
-                    Some(RecordState::New(data)) => {
-                        let _ = s.provider.put_record(TraxRecord::Steps(data)).await;
-                    }
-                    Some(RecordState::Original(_)) => {}
-                    Some(RecordState::Updated(steps)) => {
-                        let _ = s
-                            .provider
-                            .update_record(Record {
-                                id: steps.id,
-                                data: TraxRecord::Steps(steps.data),
-                            })
-                            .await;
-                    }
-                    Some(RecordState::Deleted(_)) => {}
-                    None => {}
-                }
-
-                let records = s
-                    .records
-                    .write()
-                    .unwrap()
-                    .drain()
-                    .map(|(_, record)| record)
-                    .collect::<Vec<RecordState<TraxRecord>>>();
-
-                for record in records {
-                    match record {
-                        RecordState::New(data) => {
-                            let _ = s.provider.put_record(data).await;
-                        }
-                        RecordState::Original(_) => {}
-                        RecordState::Updated(r) => {
-                            let _ = s.provider.update_record(r.clone()).await;
-                        }
-                        RecordState::Deleted(_) => unimplemented!(),
-                    }
-                }
-            }
+            async move { s.async_save().await }
         });
     }
 
+    pub async fn async_save(&self) {
+        println!("async_save");
+        let weight_record = self.weight.read().unwrap().clone();
+        match weight_record {
+            Some(RecordState::New(data)) => {
+                let _ = self.provider.put_record(TraxRecord::Weight(data)).await;
+            }
+            Some(RecordState::Original(_)) => {}
+            Some(RecordState::Updated(weight)) => {
+                let _ = self
+                    .provider
+                    .update_record(Record {
+                        id: weight.id,
+                        data: TraxRecord::Weight(weight.data),
+                    })
+                    .await;
+            }
+            Some(RecordState::Deleted(_)) => {}
+            None => {}
+        }
+
+        let steps_record = self.steps.read().unwrap().clone();
+        match steps_record {
+            Some(RecordState::New(data)) => {
+                let _ = self.provider.put_record(TraxRecord::Steps(data)).await;
+            }
+            Some(RecordState::Original(_)) => {}
+            Some(RecordState::Updated(steps)) => {
+                let _ = self
+                    .provider
+                    .update_record(Record {
+                        id: steps.id,
+                        data: TraxRecord::Steps(steps.data),
+                    })
+                    .await;
+            }
+            Some(RecordState::Deleted(_)) => {}
+            None => {}
+        }
+
+        let records = self
+            .records
+            .write()
+            .unwrap()
+            .drain()
+            .map(|(_, record)| record)
+            .collect::<Vec<RecordState<TraxRecord>>>();
+
+        for record in records {
+            println!("saving record: {:?}", record);
+            match record {
+                RecordState::New(data) => {
+                    let _ = self.provider.put_record(data).await;
+                }
+                RecordState::Original(_) => {}
+                RecordState::Updated(r) => {
+                    let _ = self.provider.update_record(r.clone()).await;
+                }
+                RecordState::Deleted(_) => unimplemented!(),
+            }
+        }
+    }
+
     pub fn revert(&self) {
         unimplemented!();
     }
@@ -247,11 +345,32 @@ impl DayDetailViewModel {
 mod test {
     use super::*;
     use async_trait::async_trait;
+    use chrono::{DateTime, FixedOffset, TimeZone};
     use dimensioned::si;
     use emseries::Record;
 
+    #[derive(Clone, Debug)]
     struct MockProvider {
-        records: Vec<Record<TraxRecord>>,
+        records: Arc<RwLock<HashMap<RecordId, Record<TraxRecord>>>>,
+
+        put_records: Arc<RwLock<Vec<Record<TraxRecord>>>>,
+        updated_records: Arc<RwLock<Vec<Record<TraxRecord>>>>,
+        deleted_records: Arc<RwLock<Vec<RecordId>>>,
+    }
+
+    impl MockProvider {
+        fn new(records: Vec<Record<TraxRecord>>) -> Self {
+            let record_map = records
+                .into_iter()
+                .map(|r| (r.id.clone(), r))
+                .collect::<HashMap<RecordId, Record<TraxRecord>>>();
+            Self {
+                records: Arc::new(RwLock::new(record_map)),
+                put_records: Arc::new(RwLock::new(vec![])),
+                updated_records: Arc::new(RwLock::new(vec![])),
+                deleted_records: Arc::new(RwLock::new(vec![])),
+            }
+        }
     }
 
     #[async_trait]
@@ -265,14 +384,24 @@ mod test {
             let end = emseries::Timestamp::Date(end);
             Ok(self
                 .records
+                .read()
+                .unwrap()
                 .iter()
+                .map(|(_, r)| r)
                 .filter(|r| r.timestamp() >= start && r.timestamp() <= end)
                 .cloned()
                 .collect::<Vec<Record<TraxRecord>>>())
         }
 
         async fn put_record(&self, record: TraxRecord) -> Result<RecordId, WriteError> {
-            Err(WriteError::NoDatabase)
+            let id = RecordId::default();
+            let record = Record {
+                id: id.clone(),
+                data: record,
+            };
+            self.put_records.write().unwrap().push(record.clone());
+            self.records.write().unwrap().insert(id.clone(), record);
+            Ok(id)
         }
 
         async fn update_record(&self, record: Record<TraxRecord>) -> Result<(), WriteError> {
@@ -284,89 +413,220 @@ mod test {
         }
     }
 
-    async fn with_view_model<TestFn>(test: TestFn)
-    where
-        TestFn: Fn(DayDetailViewModel),
-    {
+    async fn create_empty_view_model() -> (DayDetailViewModel, MockProvider) {
+        let provider = MockProvider::new(vec![]);
+
+        let oct_13 = chrono::NaiveDate::from_ymd_opt(2023, 10, 13).unwrap();
+        let model = DayDetailViewModel::new(oct_13, provider.clone())
+            .await
+            .unwrap();
+        (model, provider)
+    }
+
+    async fn create_view_model() -> (DayDetailViewModel, MockProvider) {
         let oct_12 = chrono::NaiveDate::from_ymd_opt(2023, 10, 12).unwrap();
         let oct_13 = chrono::NaiveDate::from_ymd_opt(2023, 10, 13).unwrap();
-        let provider = MockProvider {
-            records: vec![
-                Record {
-                    id: RecordId::default(),
-                    data: TraxRecord::Weight(ft_core::Weight {
-                        date: oct_12.clone(),
-                        weight: 93. * si::KG,
-                    }),
-                },
-                Record {
-                    id: RecordId::default(),
-                    data: TraxRecord::Weight(ft_core::Weight {
-                        date: oct_13.clone(),
-                        weight: 95. * si::KG,
-                    }),
-                },
-                Record {
-                    id: RecordId::default(),
-                    data: TraxRecord::Steps(ft_core::Steps {
-                        date: oct_13.clone(),
-                        count: 2500,
-                    }),
-                },
-                Record {
-                    id: RecordId::default(),
-                    data: TraxRecord::Weight(ft_core::Weight {
-                        date: oct_13.clone(),
-                        weight: 91. * si::KG,
-                    }),
-                },
-                Record {
-                    id: RecordId::default(),
-                    data: TraxRecord::Steps(ft_core::Steps {
-                        date: oct_13.clone(),
-                        count: 2750,
-                    }),
-                },
-            ],
-        };
-        let model = DayDetailViewModel::new(oct_13, provider).await.unwrap();
-        test(model)
+        let oct_13_am: DateTime<FixedOffset> = oct_13
+            .clone()
+            .and_hms_opt(3, 28, 0)
+            .unwrap()
+            .and_utc()
+            .with_timezone(&FixedOffset::east_opt(5 * 3600).unwrap());
+        let provider = MockProvider::new(vec![
+            Record {
+                id: RecordId::default(),
+                data: TraxRecord::Weight(ft_core::Weight {
+                    date: oct_12.clone(),
+                    weight: 93. * si::KG,
+                }),
+            },
+            Record {
+                id: RecordId::default(),
+                data: TraxRecord::Weight(ft_core::Weight {
+                    date: oct_13.clone(),
+                    weight: 95. * si::KG,
+                }),
+            },
+            Record {
+                id: RecordId::default(),
+                data: TraxRecord::Steps(ft_core::Steps {
+                    date: oct_13.clone(),
+                    count: 2500,
+                }),
+            },
+            Record {
+                id: RecordId::default(),
+                data: TraxRecord::Weight(ft_core::Weight {
+                    date: oct_13.clone(),
+                    weight: 91. * si::KG,
+                }),
+            },
+            Record {
+                id: RecordId::default(),
+                data: TraxRecord::Steps(ft_core::Steps {
+                    date: oct_13.clone(),
+                    count: 2750,
+                }),
+            },
+            Record {
+                id: RecordId::default(),
+                data: TraxRecord::BikeRide(ft_core::TimeDistance {
+                    datetime: oct_13_am.clone(),
+                    distance: Some(15000. * si::M),
+                    duration: Some(3600. * si::S),
+                    comments: Some("somecomments present".to_owned()),
+                }),
+            },
+        ]);
+        let model = DayDetailViewModel::new(oct_13, provider.clone())
+            .await
+            .unwrap();
+        (model, provider)
     }
 
     #[tokio::test]
     async fn it_honors_only_the_first_weight_and_step_record() {
-        with_view_model(|view_model| {
-            assert_eq!(view_model.weight().map(|val| *val), Some(95. * si::KG));
-            assert_eq!(view_model.steps(), Some(2500));
-        })
-        .await;
+        let (view_model, provider) = create_view_model().await;
+        assert_eq!(view_model.weight(), Some(95. * si::KG));
+        assert_eq!(view_model.steps(), Some(2500));
     }
 
-    #[test]
-    #[ignore]
-    fn it_enforces_one_weight_and_stepcount_per_day() {}
+    #[tokio::test]
+    async fn it_can_create_a_weight_and_stepcount() {
+        let (view_model, provider) = create_empty_view_model().await;
+        assert_eq!(view_model.weight(), None);
+        assert_eq!(view_model.steps(), None);
 
-    #[test]
-    #[ignore]
-    fn it_can_construct_new_records() {}
+        view_model.set_weight(95. * si::KG);
+        view_model.set_steps(250);
 
-    #[test]
-    #[ignore]
-    fn it_can_update_an_existing_record() {}
+        assert_eq!(view_model.weight(), Some(95. * si::KG));
+        assert_eq!(view_model.steps(), Some(250));
 
-    #[test]
-    #[ignore]
-    fn it_can_remove_a_new_record() {}
+        view_model.set_weight(93. * si::KG);
+        view_model.set_steps(255);
 
-    #[test]
-    #[ignore]
-    fn it_can_delete_an_existing_record() {}
+        assert_eq!(view_model.weight(), Some(93. * si::KG));
+        assert_eq!(view_model.steps(), Some(255));
 
-    #[test]
-    #[ignore]
-    fn it_retrieve_records_by_workout() {}
+        view_model.async_save().await;
 
-    #[test]
+        println!("provider: {:?}", provider);
+        assert_eq!(provider.put_records.read().unwrap().len(), 2);
+        assert_eq!(provider.updated_records.read().unwrap().len(), 0);
+        assert_eq!(provider.deleted_records.read().unwrap().len(), 0);
+    }
+
+    #[tokio::test]
+    async fn it_can_construct_new_records() {
+        let (view_model, provider) = create_empty_view_model().await;
+        assert_eq!(
+            view_model.time_distance_summary(TimeDistanceWorkoutType::BikeRide),
+            (0. * si::M, 0. * si::S)
+        );
+
+        let mut record = view_model.new_time_distance(TimeDistanceWorkoutType::BikeRide);
+        record.data.duration = Some(60. * si::S);
+        view_model.async_save().await;
+
+        assert_eq!(provider.put_records.read().unwrap().len(), 1);
+        assert_eq!(provider.updated_records.read().unwrap().len(), 0);
+        assert_eq!(provider.deleted_records.read().unwrap().len(), 0);
+    }
+
+    #[tokio::test]
+    async fn it_can_update_a_new_record_before_saving() {
+        let (view_model, provider) = create_empty_view_model().await;
+        assert_eq!(
+            view_model.time_distance_summary(TimeDistanceWorkoutType::BikeRide),
+            (0. * si::M, 0. * si::S)
+        );
+
+        let mut record = view_model.new_time_distance(TimeDistanceWorkoutType::BikeRide);
+        record.data.duration = Some(60. * si::S);
+        view_model.update_time_distance(record.clone());
+        let record = Record {
+            id: record.id,
+            data: TraxRecord::BikeRide(record.data),
+        };
+        assert_eq!(view_model.get_record(&record.id), Some(record));
+        assert_eq!(
+            view_model.time_distance_summary(TimeDistanceWorkoutType::BikeRide),
+            (0. * si::M, 60. * si::S)
+        );
+        assert_eq!(
+            view_model.time_distance_summary(TimeDistanceWorkoutType::Run),
+            (0. * si::M, 0. * si::S)
+        );
+        view_model.async_save().await;
+
+        assert_eq!(provider.put_records.read().unwrap().len(), 1);
+        assert_eq!(provider.updated_records.read().unwrap().len(), 0);
+        assert_eq!(provider.deleted_records.read().unwrap().len(), 0);
+    }
+
+    #[tokio::test]
     #[ignore]
-    fn it_summarizes_records_by_workout_type() {}
+    async fn it_can_update_an_existing_record() {
+        let (view_model, provider) = create_view_model().await;
+        let mut workout = view_model
+            .time_distance_records(RecordType::BikeRide)
+            .first()
+            .cloned()
+            .unwrap();
+
+        workout.data.duration = Some(1800. * si::S);
+        view_model.update_time_distance(workout.clone());
+
+        assert_eq!(
+            view_model.time_distance_summary(TimeDistanceWorkoutType::BikeRide),
+            (15000. * si::M, 1800. * si::S)
+        );
+
+        view_model.save();
+
+        assert_eq!(provider.put_records.read().unwrap().len(), 0);
+        assert_eq!(provider.updated_records.read().unwrap().len(), 1);
+        assert_eq!(provider.deleted_records.read().unwrap().len(), 0);
+    }
+
+    #[tokio::test]
+    #[ignore]
+    async fn it_can_remove_a_new_record() {
+        let (view_model, provider) = create_empty_view_model().await;
+        assert_eq!(
+            view_model.time_distance_summary(TimeDistanceWorkoutType::BikeRide),
+            (0. * si::M, 0. * si::S)
+        );
+
+        let record = view_model.new_time_distance(TimeDistanceWorkoutType::BikeRide);
+        view_model.remove_record(record.id);
+        view_model.save();
+
+        assert_eq!(provider.put_records.read().unwrap().len(), 0);
+        assert_eq!(provider.updated_records.read().unwrap().len(), 0);
+        assert_eq!(provider.deleted_records.read().unwrap().len(), 0);
+    }
+
+    #[tokio::test]
+    #[ignore]
+    async fn it_can_delete_an_existing_record() {
+        let (view_model, provider) = create_view_model().await;
+        let mut workout = view_model
+            .time_distance_records(RecordType::BikeRide)
+            .first()
+            .cloned()
+            .unwrap();
+
+        view_model.remove_record(workout.id);
+        assert_eq!(
+            view_model.time_distance_summary(TimeDistanceWorkoutType::BikeRide),
+            (0. * si::M, 0. * si::S)
+        );
+        view_model.save();
+
+        assert_eq!(provider.put_records.read().unwrap().len(), 0);
+        assert_eq!(provider.updated_records.read().unwrap().len(), 0);
+        assert_eq!(provider.deleted_records.read().unwrap().len(), 1);
+    }
 }
diff --git a/fitnesstrax/core/src/lib.rs b/fitnesstrax/core/src/lib.rs
index 207f483..8e2144a 100644
--- a/fitnesstrax/core/src/lib.rs
+++ b/fitnesstrax/core/src/lib.rs
@@ -1,4 +1,4 @@
 mod legacy;
 
 mod types;
-pub use types::{RecordType, Steps, TimeDistance, TraxRecord, Weight};
+pub use types::{RecordType, Steps, TimeDistance, TimeDistanceWorkoutType, TraxRecord, Weight};
diff --git a/fitnesstrax/core/src/types.rs b/fitnesstrax/core/src/types.rs
index b0959f7..a475dba 100644
--- a/fitnesstrax/core/src/types.rs
+++ b/fitnesstrax/core/src/types.rs
@@ -57,6 +57,16 @@ pub struct TimeDistance {
     pub comments: Option<String>,
 }
 
+impl Recordable for TimeDistance {
+    fn timestamp(&self) -> Timestamp {
+        Timestamp::DateTime(self.datetime)
+    }
+
+    fn tags(&self) -> Vec<String> {
+        vec![]
+    }
+}
+
 /// A singular daily weight measurement. Weight changes slowly enough that it seems unlikely to
 /// need to track more than a single weight in a day.
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
@@ -86,6 +96,15 @@ pub enum RecordType {
     Weight,
 }
 
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum TimeDistanceWorkoutType {
+    BikeRide,
+    Row,
+    Run,
+    Swim,
+    Walk,
+}
+
 /// The unified data structure for all records that are part of the app.
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub enum TraxRecord {
@@ -99,6 +118,16 @@ pub enum TraxRecord {
 }
 
 impl TraxRecord {
+    pub fn from_time_distance(type_: TimeDistanceWorkoutType, workout: TimeDistance) -> Self {
+        match type_ {
+            TimeDistanceWorkoutType::BikeRide => Self::BikeRide(workout),
+            TimeDistanceWorkoutType::Run => Self::Run(workout),
+            TimeDistanceWorkoutType::Row => Self::Row(workout),
+            TimeDistanceWorkoutType::Swim => Self::Swim(workout),
+            TimeDistanceWorkoutType::Walk => Self::Walk(workout),
+        }
+    }
+
     pub fn workout_type(&self) -> RecordType {
         match self {
             TraxRecord::BikeRide(_) => RecordType::BikeRide,
@@ -118,6 +147,27 @@ impl TraxRecord {
     pub fn is_steps(&self) -> bool {
         matches!(self, TraxRecord::Steps(_))
     }
+
+    pub fn is_time_distance(&self) -> bool {
+        matches!(
+            self,
+            TraxRecord::BikeRide(_)
+                | TraxRecord::Row(_)
+                | TraxRecord::Run(_)
+                | TraxRecord::Swim(_)
+                | TraxRecord::Walk(_)
+        )
+    }
+
+    pub fn is_time_distance_type(&self, type_: TimeDistanceWorkoutType) -> bool {
+        match type_ {
+            TimeDistanceWorkoutType::BikeRide => matches!(self, TraxRecord::BikeRide(_)),
+            TimeDistanceWorkoutType::Row => matches!(self, TraxRecord::Row(_)),
+            TimeDistanceWorkoutType::Run => matches!(self, TraxRecord::Run(_)),
+            TimeDistanceWorkoutType::Swim => matches!(self, TraxRecord::Swim(_)),
+            TimeDistanceWorkoutType::Walk => matches!(self, TraxRecord::Walk(_)),
+        }
+    }
 }
 
 impl Recordable for TraxRecord {