Workout Timer App: a full-body interval workout in about 18 minutes.
This Workout Timer App is a simple interval training tool you can run directly in your browser. The default program is a full-body circuit that takes about 18 minutes and guides you through timed exercises and rest periods automatically, so you can focus on training instead of watching the clock.
What this workout timer does
The app runs a structured sequence of exercises with a clear timer, short rest breaks, and automatic progression to the next movement. It’s built for consistency: press Start, follow the instructions, and complete the session without planning, counting reps, or setting up equipment.
How to use the app
- Press Start and follow the “Now” exercise shown on screen.
- Work for the full interval, then use the rest period to reset your breathing and form.
- Repeat through the full circuit (3 rounds by default).
- Use Pause if you need to stop, Skip to move forward, and Reset to restart the session.
For best results, train 3–5 times per week. Keep the movements controlled and prioritize good form over speed.
How long the workout is
The program is based on 40 seconds of work and 20 seconds of rest, repeated across 6 exercises for 3 rounds. That creates a high-density training session that fits into a lunch break while still delivering a real training stimulus.
What results you can expect
Used consistently, this type of full-body interval training improves:
- overall conditioning and work capacity
- muscle endurance and visible “tone”
- core strength and posture
- calorie burn and body composition over time
The biggest driver of results is consistency. A short plan you actually complete beats a perfect plan you rarely do.
Why these exercises are included
This workout is built around fundamental movement patterns for a trained, athletic body — without equipment:
- Squats: legs and glutes (knee-dominant strength)
- Push-ups: upper-body pushing strength + core stability
- Hip hinge: posterior chain (glutes/hamstrings/back pattern)
- Plank: trunk stiffness and posture under fatigue
- Jumping jacks: simple, low-skill cardio to elevate heart rate
- Mountain climbers: cardio + core control with a higher intensity finish
Together, these cover the “big rocks” of fitness: lower body, upper body, core, and conditioning.
Why 40 seconds work and 20 seconds rest works
This interval structure is a practical sweet spot:
- long enough to create a meaningful conditioning and muscular endurance stimulus
- short enough to maintain technique and intensity
- brief rest periods keep heart rate elevated and build real-world work capacity
It’s designed to be hard, but repeatable — so you can train often and progress.
How to progress over time
After 2–3 weeks: increase weekly frequency.
Keep the exercise list stable for 6–8 weeks before you change movements. Progress comes from repeated exposure and gradual overload, not constant novelty.
Who this timer is for
This app is ideal if you want a fast, effective, no-equipment workout at home, at the office, or while traveling. It’s also useful as a baseline routine you can run year-round when motivation or time is low.