diff --git a/src/stats/index.ts b/src/stats/index.ts
index 2e8c0fa..1570606 100644
--- a/src/stats/index.ts
+++ b/src/stats/index.ts
@@ -2,7 +2,6 @@ import { Workout } from "../ast";
 import { averageIntensity } from "./averageIntensity";
 import { normalizedIntensity } from "./normalizedIntensity";
 import { totalDuration } from "./totalDuration";
-import { tss } from "./tss";
 import { tss2 } from "./tss2";
 import { zoneDistribution } from "./zoneDistribution";
 
@@ -19,8 +18,7 @@ Total duration: ${(duration.seconds / 60).toFixed()} minutes
 Average intensity: ${(avgIntensity.value * 100).toFixed()}%
 Normalized intensity: ${(normIntensity.value * 100).toFixed()}%
 
-TSS #1: ${tss(intervals).toFixed()}
-TSS #2: ${tss2(duration, normIntensity).toFixed()}
+TSS: ${tss2(duration, normIntensity).toFixed()}
 
 Zone Distribution:
 ${zones.map(({ name, duration }) => `${(duration.seconds / 60).toFixed().padStart(3)} min - ${name}`).join("\n")}
diff --git a/src/stats/tss.ts b/src/stats/tss.ts
deleted file mode 100644
index 2c95478..0000000
--- a/src/stats/tss.ts
+++ /dev/null
@@ -1,36 +0,0 @@
-import { Interval } from "../ast";
-import { Duration } from "../Duration";
-
-// Training Stress Score formula from Training and Racing with a Power Meter:
-//
-// TSS = (s * W * IF) / (FTP * 3600) * 100
-//
-// s - duration in seconds
-// W - power in watts
-// IF - intensity factor (power / FTP)
-
-const steadyTss = (duration: Duration, intensity: number): number => {
-  return ((duration.seconds * intensity * intensity) / 3600) * 100;
-};
-
-const rangeTss = (duration: Duration, from: number, to: number): number => {
-  let score = 0;
-  const step = new Duration(1);
-  for (let i = 0; i < duration.seconds; i += step.seconds) {
-    const intensity = from + (to - from) * (i / duration.seconds);
-    score += steadyTss(step, intensity);
-  }
-  return score;
-};
-
-const intervalTss = ({ duration, intensity }: Interval): number => {
-  if (intensity.start === intensity.end) {
-    return steadyTss(duration, intensity.value);
-  } else {
-    return rangeTss(duration, intensity.start, intensity.end);
-  }
-};
-
-export const tss = (intervals: Interval[]): number => {
-  return intervals.map(intervalTss).reduce((a, b) => a + b, 0);
-};
diff --git a/test/__snapshots__/cli.test.ts.snap b/test/__snapshots__/cli.test.ts.snap
index 1819f81..9596e3b 100644
--- a/test/__snapshots__/cli.test.ts.snap
+++ b/test/__snapshots__/cli.test.ts.snap
@@ -245,8 +245,7 @@ Total duration: 24 minutes
 Average intensity: 60%
 Normalized intensity: 74%
 
-TSS #1: 17
-TSS #2: 22
+TSS: 22
 
 Zone Distribution:
  15 min - Z1: Recovery
@@ -265,8 +264,7 @@ Total duration: 43 minutes
 Average intensity: 79%
 Normalized intensity: 84%
 
-TSS #1: 48
-TSS #2: 51
+TSS: 51
 
 Zone Distribution:
  10 min - Z1: Recovery
@@ -285,8 +283,7 @@ Total duration: 45 minutes
 Average intensity: 36%
 Normalized intensity: 71%
 
-TSS #1: 21
-TSS #2: 37
+TSS: 37
 
 Zone Distribution:
  35 min - Z1: Recovery
@@ -305,8 +302,7 @@ Total duration: 62 minutes
 Average intensity: 74%
 Normalized intensity: 81%
 
-TSS #1: 62
-TSS #2: 68
+TSS: 68
 
 Zone Distribution:
  22 min - Z1: Recovery
@@ -325,8 +321,7 @@ Total duration: 79 minutes
 Average intensity: 69%
 Normalized intensity: 78%
 
-TSS #1: 69
-TSS #2: 81
+TSS: 81
 
 Zone Distribution:
  42 min - Z1: Recovery