How to read the result
Get a rest target that protects the next set. The notes below show the assumptions behind that recommendation.
Rest Time Calculator
Get a rest target that protects the next set. Most rest advice gives a broad range. This tool turns the last set and next-set priority into a timer target.
Log the set in Jacked and the next target stays with the workout.
How the rest target is chosen
The calculator starts with your goal, then adjusts for exercise type, reps, RIR, set difficulty, next-set priority, and time pressure.
When to rest longer
Rest longer when the lift is heavy, compound, close to failure, or when the next set needs load and rep quality.
When to rest shorter
Rest shorter for isolation work, easier sets, endurance work, or when time is the limiting constraint.
Common mistakes
Do not rush rest if it changes technique, cuts reps, or turns the wrong muscle into the limiter.
Short answers
How long should I rest between sets?
Long enough that the next set can hit the intended reps, load, and target muscle without technique breaking down.
Is shorter rest better for hypertrophy?
Not if it reduces useful hard reps. Short rest is a tool, not the goal.
Jacked turns your training history into next-set targets, RIR tracking, rest timing, smart warm-ups, PRs, and progress feedback.
Method, assumptions, and privacy
Method
Starts from goal and exercise type, then adjusts rest time for reps, RIR, last-set difficulty, next-set priority, and time pressure.
Assumptions
The right rest is the shortest rest that preserves the next set target and technique standard.
Privacy
Inputs are handled in the browser for the web tool experience. Jacked should only store lifting data when a user chooses to log it in the app.
Check the method before you trust the number. Bad inputs still produce tidy-looking outputs.
This is one set.
Jacked does it for your whole workout: next-set targets, RIR, rest timing, warm-ups, PRs, and progress feedback.
Download Jacked for iPhone