⏱️ Interval Recovery Ratio Calculator

Use this to compare work and rest inside interval sessions. It is a simple way to see whether a workout is built for speed, threshold, or just surviving the session.

Formula: Work-to-rest ratio = work interval ÷ rest interval

Calculator

1:1 for balanced efforts | 1:2 or 1:3 for speed work | 2:1 or tighter for hard threshold work

Why This Matters

Interval ratios shape the whole feel of a workout. A 1:3 session is very different from a 2:1 session, even if both sound like interval training.

When you track the ratio on purpose, you stop guessing whether a session is actually built for speed, threshold, or toughness.

Reference Ranges

Quick read: 1:1 for balanced efforts | 1:2 or 1:3 for speed work | 2:1 or tighter for hard threshold work

Example Calculations

InputResult
Work 30s, rest 60sRatio: 1:2
Work 4 min, rest 2 minRatio: 2:1

How FitnessView Helps

FitnessView gives you the workout history and heart rate response to see whether the ratio is doing what you wanted.

That makes planning the next interval block a lot easier.

Tips

Frequently Asked Questions

Is a tighter ratio always better?

No. The best ratio depends on the goal. Shorter rest is not automatically smarter.

Can this help with running workouts?

Absolutely. It works for running, cycling, rowing, and any other interval-based training.

Do I need perfect precision?

Not perfect, just consistent. Keep the same unit and the ratio will be useful.

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