diff --git a/README.md b/README.md
index 3a3ac7e..c955df7 100644
--- a/README.md
+++ b/README.md
@@ -116,7 +116,6 @@ console.log(stats(workout));
 - Unsupported params: message duration & y-position
 - More restricted syntax for text (with quotes)
 - Concatenate similar intervals
-- Sync TSS prediction of free-ride with Zwift (64 TSS for 1h freeride)
 - Distinguish between terrain-sensitive and insensitive free-ride.
 - Syntax for comments placed relative to previous ones, e.g. `@ +00:10`
 - Detect overlaps of comments.
diff --git a/src/Intensity.ts b/src/Intensity.ts
index 78eaf10..544298c 100644
--- a/src/Intensity.ts
+++ b/src/Intensity.ts
@@ -49,15 +49,16 @@ export class RangeIntensity implements Intensity {
 
 export class FreeIntensity implements Intensity {
   get value() {
-    return 0;
+    // To match Zwift, which gives 64 TSS for 1h of freeride.
+    return 0.8;
   }
 
   get start() {
-    return 0;
+    return this.value;
   }
 
   get end() {
-    return 0;
+    return this.value;
   }
 
   get zone() {
diff --git a/test/__snapshots__/cli.test.ts.snap b/test/__snapshots__/cli.test.ts.snap
index fe4ac29..d0093c5 100644
--- a/test/__snapshots__/cli.test.ts.snap
+++ b/test/__snapshots__/cli.test.ts.snap
@@ -300,10 +300,10 @@ exports[`Generate stats examples/ftp-test.txt 1`] = `
 "
 Total duration: 45 minutes
 
-Average intensity: 36%
-Normalized intensity: 71%
+Average intensity: 72%
+Normalized intensity: 81%
 
-TSS: 37
+TSS: 49
 XP: 336
 
 Zone Distribution: