What Is the Scientific 7-Minute Workout?

Where the “scientific” 7-minute workout comes from

Brett Klika and Chris Jordan described the routine in High-Intensity Circuit Training Using Body Weight: Maximum Results With Minimal Investment, published in the May/June 2013 issue of ACSM’s Health & Fitness Journal. Their practical question was how to combine aerobic and resistance exercise when time and access to equipment are limited.

Gretchen Reynolds brought the sample program to a wider audience in “The Scientific 7-Minute Workout,” published in New York Times Well on May 9, 2013. The name stuck.

“Scientific” needs context. The journal article explains a programming approach informed by broader research on circuits and interval training. It is not a report of one experiment proving that this exact sequence of 12 moves delivers every benefit associated with HIIT. Studies of cycling intervals, including work from McMaster, should not be read as tests of this bodyweight circuit.

HICT vs HIIT in plain language

HIIT means high-intensity interval training: harder efforts separated by recovery. HICT means high-intensity circuit training: moving through a series of exercise stations with limited rest. This routine uses a circuit to mix different kinds of effort. The terms overlap, but “HIIT” alone does not tell you which exercises, intervals, or training load a study used.

The protocol at a glance

Exercises

12, in a fixed order

Work / transition

30 seconds / 10 seconds

One circuit

About 7 minutes; allow roughly 8 on the clock

Equipment

Body weight, sturdy chair, wall

Effort

Hard: often described as about 8 out of 10

More time?

The authors suggest repeating the circuit 2–3 times

The familiar name rounds the duration down: twelve 30-second work intervals already total six minutes. Eleven 10-second transitions bring it to 7 minutes 50 seconds, or eight minutes if a final transition is included. Warm-up, setup, and recovery take additional time.

The roughly 8/10 effort description is a subjective guide, not a heart-rate prescription or a beginner’s starting requirement. Hard should still leave room for controlled movement. Learn the exercises first; the clock is not a reason to rush technique.

The 12 exercises (classic order)

This is the original sequence used by the classic workout in 7min Challenge. The labels describe each station’s role in the circuit, rather than every muscle it uses.

1. Jumping jack — total body
2. Wall sit — lower body
3. Push-up — upper body
4. Abdominal crunch — core
5. Step-up onto chair — total body
6. Squat — lower body
7. Triceps dip on chair — upper body
8. Plank — core
9. High knees / running in place — total body
10. Lunge — lower body
11. Push-up and rotation — upper body
12. Side plank — core

Read the form instructions before starting, particularly for step-ups, dips, and rotations. The app’s free exercise guides can help you review each movement without a countdown running. A list of names is a useful map, but it cannot check your technique or decide which variation fits you.

Why the exercise order matters

The sequence cycles through total body, lower body, upper body, and core. That alternation lets one area recover somewhat while another becomes the focus. It also spreads the work across the circuit instead of putting every demanding leg or arm exercise together.

The order and the 10-second transitions work together. Those short gaps are for changing position, not complete recovery. Rearranging the moves or taking much longer breaks changes the session’s demands. That may be appropriate for you; simply recognize it as an adaptation rather than the exact classic protocol. Safe transitions come first.

One round or more?

One round is a compact session. The authors also suggest repeating the circuit two or three times when time allows. More rounds mean more work, so allow for your current fitness, technique, and recovery rather than treating the longer option as a requirement.

Whether one round is “enough” depends on what you want to build and what else you do. It does not automatically replace walking, longer aerobic activity, progressive strength training, or sport-specific practice. A short circuit can be one part of your week without having to stand in for the whole week.

In 7min Challenge, you can stack rounds by selecting the number of circuits before you start.

Who should modify or get clearance

The original protocol is vigorous. Klika and Jordan recommend medical clearance and highlight extra caution for people returning after inactivity, older adults, people with previous injuries, people with overweight or obesity, and those with other health conditions. Bodyweight does not automatically mean easy or suitable for everyone.

In their original safety notes, the authors do not recommend the isometric holds — wall sit, plank, and side plank — for people with hypertension or heart disease. They describe replacing these with dynamic movements. If this applies to you, ask a clinician about suitable substitutions and intensity; this historical protocol is not personalized medical advice.

Avoid breath-holding and straining, also called the Valsalva maneuver, especially during holds. If the movements are unfamiliar, take time to learn them and use appropriate modifications or longer rests. You do not need to reach the advertised intensity on your first attempt.

How to try it

Clear enough floor space to lie down and move your arms. Find a clear wall and check that your chair is stable, non-slip, and suitable for the load; avoid wheels or folding seats. A chair that works for sitting may still be unsuitable for stepping onto. Choose a safe alternative if needed.

Review the moves, warm up, and decide on modifications before starting. Put your timer where you can hear it. Use the transitions to change position carefully, and pause if you need more time. Finishing a countdown matters less than moving with control.

If you want to run the classic circuit without planning intervals, 7min Challenge times the 12 moves for you. The core workout and exercise guides are free, with no account and no leaderboards.

FAQ

What is the scientific 7-minute workout?

The scientific 7-minute workout is a 12-exercise bodyweight circuit with 30 seconds of work and 10-second transitions. It combines whole-body, lower-body, upper-body, and core stations. The name refers to a sample HICT program published by Brett Klika and Chris Jordan in 2013, rather than a promise that seven minutes meets every fitness goal.

Who created it?

Brett Klika and Chris Jordan published the sample circuit in ACSM’s Health & Fitness Journal in May/June 2013. Their article explained how to organize high-intensity circuit training using body weight. Gretchen Reynolds popularized the routine in New York Times Well on May 9, 2013; the Times coverage did not originate the program.

What equipment do I need?

The classic circuit uses your body weight, a sturdy chair, and a wall. You also need enough clear floor space for push-ups, crunches, and planks, plus a way to time the intervals. Check the chair’s stability and suitability before using it for step-ups or dips; ordinary household furniture is not always safe for exercise.

How many exercises and how long is each interval?

There are 12 exercises. Each work interval lasts 30 seconds, followed by 10 seconds to transition between stations. Although called the seven-minute workout, those intervals take roughly eight minutes in full: 7 minutes 50 seconds with eleven transitions. Setup, warming up, and any additional recovery sit outside that circuit time.

Should I do more than one round?

You can, if the workload suits you. Klika and Jordan suggest repeating the circuit two or three times when time allows. One round is a shorter session; additional rounds increase its volume. The right amount depends on your fitness, goals, recovery, and other activity, rather than on a universal rule that everyone needs the same number.

Is it safe for beginners?

The full-intensity protocol is demanding, so beginners may need easier movements, more rest, and time to learn technique. The original authors recommend medical clearance and caution for several groups, including people returning after inactivity or with health conditions. Their notes advise against the isometric stations for hypertension or heart disease; seek individual guidance if that applies.

Why does exercise order matter?

The classic order alternates total-body, lower-body, upper-body, and core work so that one region can recover somewhat while another works. Together with short transitions, that structure shapes the circuit’s demands. Grouping similar exercises together changes the workload; keeping the original order helps you follow the intended program, while modifications should reflect your needs.