AMRAP With Friends

15 minute AMRAP

The Rower's Engine

Cardio capacity · Engine Room · intensity 3 of 5

The workout

As many rounds as possible in 15 minutes of:

Overview

The Rower's Engine is 10 combat sprawls, 15 back widow, and 30 jumping jacks. The work moves through the full body and the upper back instead of sitting on one muscle.

Muscles worked

Energy systems

These are overlapping contributions. This workout is not assigned to one energy system.

  • Glycolytic: Low
  • Oxidative: High
  • Neuromuscular: Low

Training effect

Immediate demand

15 minutes, intensity 3 of 5. Today the limiter is 30 jumping jacks.

Intended stimulus

The same capacity work, with movements you can repeat for the whole clock. On this workout that is 10 combat sprawls, 15 back widow, and 30 jumping jacks.

Repeated practice

Repeat the same workout and compare the score. What can change over weeks is how long that pace lasts. One time through does not produce that change.

Body-composition context

Body weight changes with the rest of how you eat and train. This workout is one piece of work on one day.

Expected feel

30 jumping jacks is where the round gets hard. The other movements still have to be finished after it.

Pacing

Sprawls keep the lungs hot; widows are active recovery that still loads the rhomboids. Soft landings, elbows punching the floor.

30 jumping jacks is where the round gets long. That set is where a planned break belongs. If that set falls apart, shorten the combat sprawls on the next round rather than rushing it.

The movements

Combat Sprawls

You must land with your entire foot completely flat on the mat when returning from the plank. Landing on your toes in this wide stance places severe shearing force on the knee capsule and kills your ability to rebound.

What not to do. Landing the feet inside the hands, leaving no room to lift the chest.

Back Widow

Do not turn this into a core crunch. Your lower back and glutes must stay anchored to the floor. The only reason your torso lifts is because your lats and rhomboids are pressing the earth away.

What not to do. Turning the lift into a crunch so the lower back and hips leave the floor.

Jumping Jacks

Use this movement for active recovery. When paired with burpees or mountain climbers, the jumping jack is your opportunity to catch your breath.

What not to do. Bending the elbows so the hands never meet overhead.

Why these movements

The work moves through the full body and the upper back instead of sitting on one muscle.

Scaling

Keep the round short enough to repeat. Drop reps so you can stay moving, rather than resting the round into a different workout.

Combat Sprawls

  • Step the feet. Step back and step in instead of jumping. Same shape, no impact.
  • Hands elevated. Hands on a bench or step so the floor never comes all the way up to you.
  • No jump at the top. Stand tall and reach instead of leaving the floor.

Back Widow

  • Shorter lift. Drive into the floor but only lift as high as you can control without the hips or neck cheating.
  • Hold the squeeze. Reach the top and freeze for a count instead of cycling reps. Same drive, less fatigue management.

Jumping Jacks

  • Low impact. Keep one foot down throughout — march the pattern instead of running it.
  • Slower cadence. Same movement, fewer beats per minute. Cadence is the dial, not the shape.

Mistakes and who it is for

  • Opening the combat sprawls at a sprint makes the jumping jacks the piece that falls apart.
  • Resting until you feel fresh between movements removes the point of keeping them in one round.
  • Spending the first minutes hard leaves the later rounds as a different, slower workout.

Suited to someone who wants 15 minutes through Combat Sprawls, Back Widow, Jumping Jacks.

Scoring and progression

Work through the movements in the order listed, then start the next round. Your score is the number of complete rounds plus any reps of the round you were partway through when the clock hit zero — written as rounds plus reps, so seven full rounds and twelve reps is7+12.

Progression is repeating this workout and comparing that score. The page does not promise a change from one time through.

Related workouts

Run it with friends

The Rower's Engine runs on a shared countdown: share a rally link, everyone gets the same 15-minute clock, and the leaderboard updates as people log rounds.

Start this workoutMore 15 minute AMRAPs