20 Seconds of Suffering - Crossfit Workout

15 Rounds - 20 sec on / 40 sec off

Knee raises in rings / Knees to elbow / Toes to rings
Clusters - @20/35 Intermediate: @30/40 RX: @35/50
Assault bike
Shoulders to overhead - @20/35 Intermediate: @30/40 RX: @35/50
Wall balls 14/10 lbs

workout description

"20 Seconds of Fury – 15-Round ON/OFF"

15 Rounds
20 seconds ON / 40 seconds OFF
Rotate through these 5 movements:

Knee Raises in Rings / Knees to Elbow / Toes to Rings

Barbell Clusters
@20/35 kg
Intermediate: @30/40 kg
RX: @35/50 kg

Assault Bike (calories)

Barbell Shoulder to Overhead (same bar)

Wall Balls (14/10 lbs)

Total Time: 15 minutes
Format: Perform one movement per round, cycling through the list 3 full times. Max effort during each 20-second work window.

This ON/OFF style interval workout demands repeated max-effort bursts with limited volume per round. It builds explosive conditioning, barbell cycling capacity, and core stamina. Don’t pace—send it every time. Expect spiking heart rates, burning lungs, and surprisingly sneaky fatigue.

crossfit workout, crossfit exercise, crossfit workouts, crossfit inspiration

Workouts with the same "on-off" format

on-off
Watt the Hell

, , , , , , , , ,

3 ON/1 OFF x 4

1: 22/28 cal bike + v-ups
2: 22/28 cal assault bike + wall walks
3: 22/28 cal roning + T2B
4: 22/28 cal ski + burpees to ski

Try it
on-off
Bike & Die, Row & Cry

, , ,

90 ON/90 OFF x 6

A: 24 FR. Lunges
ME cal bike

B: 14 Power Snatch
ME cal row

Try it
on-off
The Finish Line Is a Number

, , , ,

1 ON/1 OFF

6/10 / Intermediate: 8/12 / RX: 10/14 Cal ski
Then: Max Deadlifts in remaining time - @35/50 Intermediate: @45/60 RX: @60/80

Complete 60 total deadlifts

3 min pause

1 ON/1 OFF

8/12 / Intermediate: 10/14 / RX: 12/16 cal bike
Then: Max Air Squats in remaining time

Complete 100 Air Squats

Try it
on-off
All Out or Wipe Out

, , , , ,

2 min on/1 min off x 6
1 round of:
10 Dual DB power clean
10 Dual DB squat
10 Dual DB push press

Then alternate between:
Max effort cal bike erg / cal ski erg

Try it
on-off
Devil’s Playground

, , , ,

3 min ON/1 min OFF x 3

Round 1: 

12/15 cal row
8 Double DB devils press
ME (max effort) Air squats

Round 2: 

12/15 cal row
8 Double DB devils press
ME (max effort) Atomic sit ups/V-ups

Round 3: 

12/15 cal row
8 Double DB devils press
ME (max effort) Burpees

Try it

Workouts with simliar Tags

, , , , , , ,

for time
Three Levels of Hell

, , , , , , , , ,

For time

Buy in: 15/20 cal assault bike
3 rounds of:
12 Ring rows/pullups
8 Hand release push ups/HSPU
10 DB snatch

1 min rest

Buy in: 15/20 cal assault bike
3 rounds of:
6 (Banded) pull ups/C2B
8 Hand release push ups/HSPU
10 DB snatch

1 min rest

Buy in: 15/20 cal assault bike
3 rounds of:
3 Burpee (banded) pull ups/bar muscle ups
8 Hand release push ups/HSPU
10 DB snatch

Try it
EMOM
Sweat Cycle 16

, , , , , ,

E2MOM 16

1: 50-75 Single unders/Double unders
2: 15-20 Wallballs @14/20 lbs
3: 15-20 Atomic situps/V-ups
4: 8-18 cal assault bike

Try it
AMRAP
Rep Escalator

, , , , ,

AMRAP 10

15 Wall balls
15 Overhead lunges w. wall ball
15 Ab-mat sit up w. wall ball
15 Down up on wall ball + ground to overhead

Try it
AMRAP
Wallball Wonderland

, , , , ,

AMRAP 12

12 ring rows/pull ups
20 DB reverse lunges
8 Hand release push ups/HSPU
20 Wall balls @14/20 lbs

Try it
for time
Two Rounds of Tears

, , , , , ,

2 rounds

20 Knee raises/knees to elbows/T2B 
20 DB snatch
20 DB Goblet Squat
20 HR push ups
20 Burpee Box Jumps 

Try it

What is an "on-off" workout?

An on-off workout is a time-based training format where you alternate between work periods and rest periods — for example, 1 minute on, 1 minute off. In an on-off CrossFit workout, your goal is to perform as many reps as possible during the "on" phase, then recover during the "off" phase before the next interval begins.

This format helps you push hard during the work period, knowing you have built-in rest. It's especially useful for building intensity, power output, and recovery efficiency.

Why Try an On-Off CrossFit Workout?

  • Encourages maximum effort during work intervals

  • Helps improve work-to-rest ratio awareness and recovery speed

  • Perfect for training sprints, weightlifting, or gymnastics under fatigue

  • Easily adaptable to all fitness levels and time domains

Whether you're doing 30 seconds on / 30 seconds off or longer 2–3 minute intervals, an on-off workout is a powerful way to train smart and hard — one round at a time. Ideal for interval-based CrossFit workouts, EMOM-style sprints, and team formats.

What kind of exercises are in this workout?

  • toes to rings

    Toes to rings is a dynamic gymnastics movement where the athlete lifts their toes to touch the gymnastic rings while hanging. Common in toes to rings workouts, this movement combines core strength, grip endurance, and precise body control—all made more demanding by the instability of the rings.

    In this workout, toes to rings train the entire anterior chain—especially the abs, hip flexors, and shoulders—while developing coordination and midline stability. As a more advanced variation of knee raises, it builds toward high-skill gymnastics like toes-to-bar and muscle-ups.

  • ring knee raise

    Ring knee raises are a core-centric gymnastics movement performed while hanging from gymnastic rings. Featured in ring knee raise workouts, they challenge stability, grip, and body control—especially as the unstable rings force more muscle engagement than bar-based variations.

    In this workout, ring knee raises target the lower abs, hip flexors, and lats while improving coordination and shoulder stability. They’re a scalable progression toward more advanced movements like toes-to-rings or toes-to-bar, and offer a unique challenge for core development in functional training.

  • wall ball

    The wall ball is a classic CrossFit movement that combines a front squat and an explosive throw, targeting your legs, shoulders, and lungs in one fluid motion. It’s a staple in any high-intensity wall ball workout, known for quickly elevating your heart rate.

    In this workout, wall balls build endurance, coordination, and full-body power. Whether you're using a 10 or 20 lb ball, this simple movement delivers serious results — especially when the reps start adding up.

  • Assault Bike

    The Assault Bike is a fan-powered machine that delivers one of the most effective full-body conditioning challenges in fitness. Common in high-intensity assault bike workouts, it trains your legs, arms, and lungs all at once — and responds directly to how hard you push.

    In this workout, the Assault Bike is used to build power, stamina, and mental toughness. Whether you're sprinting for calories or holding a steady pace, the Assault Bike is perfect for intervals, finishers, or pure engine tests.

  • shoulder to overhead

    The shoulder to overhead movement trains your ability to drive a load from the shoulders to a locked-out position overhead using one of several techniques — strict press, push press, push jerk, or split jerk. It's a staple in any shoulder to overhead workout for building upper body strength, power, and stability.

    In this workout, shoulder to overhead challenges your shoulders, triceps, and core, especially under fatigue. It’s a versatile movement that allows athletes to choose the most efficient technique to move weight overhead — depending on the load and intensity.

  • cluster

    A cluster is a hybrid movement that combines a squat clean with a thruster—taking the bar or dumbbells from the ground to overhead through a full squat and press. Popular in high-intensity cluster workouts, this movement is a total-body test of strength, stamina, and grit.

    In this workout, clusters train explosive power, front rack mobility, and overhead pressing endurance. They’re metabolically demanding, making them ideal for conditioning pieces and strength circuits. Whether performed with a barbell or dumbbells, clusters push your limits and deliver full-body results.

  • knees to elbows

    Knees to elbows is a gymnastics-based core movement performed hanging from a pull-up bar, where the knees are driven upward to make contact with the elbows. Frequently featured in knees to elbows workouts, it trains core strength, grip endurance, and body control—all under tension.

    In this workout, knees to elbows develop midline stability, lat activation, and coordination, serving as a foundational skill for more advanced movements like toes-to-bar. They’re an effective way to build functional core strength while improving shoulder and hip mobility in dynamic settings.

bookarrow-right linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram