diff --git a/init.sql b/init.sql
index ca61f6a..2a5ef58 100644
--- a/init.sql
+++ b/init.sql
@@ -1,12 +1,18 @@
 create table if not exists training(
-    id integer primary key,
+    id uuid primary key default gen_random_uuid(),
     medium varchar(255) not null,
-    uuid uuid not null,
+    comment text not null,
+    data jsonb not null default '{}'
+);
+
+create table if not exists training_data(
+    training_id uuid not null,
     t timestamp with time zone not null,
     lat float not null,
     lon float not null,
     speed float not null,
     altitude float not null,
     distance float not null,
-    kcal int not null
+    kcal int not null,
+    constraint fk_training_id foreign key(training_id) references training(id) on delete cascade
 );
\ No newline at end of file