workout

The Four Block Grinder - Crossfit Workout

4 x AMRAP 4

AMRAP 4
10 DB Clean & Jerks – Intermediate: @15/22.5 | RX: @17.5/25
4 Shuttle Runs
10 Box Jumps

Rest 2 min

AMRAP 4

12 Sit-ups
9 KB Swings – Intermediate: @24/32 | RX: @28/40
12 Push-ups

Rest 2 min and repeat

Workout Overview

“The Four Block Grinder” stacks intensity across two 4-minute AMRAPs, repeated after short rest. The first AMRAP pairs dumbbell clean and jerks with shuttle runs and box jumps—demanding power, agility, and conditioning. The second shifts gears with sit-ups, kettlebell swings, and push-ups, emphasizing midline stamina and muscular endurance. With only 2 minutes rest between blocks, this workout builds fatigue round over round. Expect rising heart rate, compounding volume, and a test of consistency under pressure.

Execution and Focus

The dumbbell clean and jerks should be snappy and rhythmic—alternate arms if needed. Move quickly on the shuttle runs but stay tight on your turns. Jump confidently on the box—no hesitations. In AMRAP 2, keep your sit-ups unbroken, manage grip on the KB swings with smooth hip drive, and maintain form on the push-ups. Each round is a short sprint—work to minimize transitions and keep moving. Use your rest to breathe and mentally prep.

Strategy and Finish

Think of each 4-minute block as its own challenge. Start each AMRAP with a plan: unbroken reps early, intentional pacing, and short rests only when necessary. Track your rounds and push to match or beat them on the second go. The grind is real—but smart pacing and hustle in transitions will pay off.

The Four Block Grinder - Crossfit Workout

4 x AMRAP 4

AMRAP 4
10 DB Clean & Jerks – Intermediate: @15/22.5 | RX: @17.5/25
4 Shuttle Runs
10 Box Jumps

Rest 2 min

AMRAP 4

12 Sit-ups
9 KB Swings – Intermediate: @24/32 | RX: @28/40
12 Push-ups

Rest 2 min and repeat

The Workout description

Workout Overview

“The Four Block Grinder” stacks intensity across two 4-minute AMRAPs, repeated after short rest. The first AMRAP pairs dumbbell clean and jerks with shuttle runs and box jumps—demanding power, agility, and conditioning. The second shifts gears with sit-ups, kettlebell swings, and push-ups, emphasizing midline stamina and muscular endurance. With only 2 minutes rest between blocks, this workout builds fatigue round over round. Expect rising heart rate, compounding volume, and a test of consistency under pressure.

Execution and Focus

The dumbbell clean and jerks should be snappy and rhythmic—alternate arms if needed. Move quickly on the shuttle runs but stay tight on your turns. Jump confidently on the box—no hesitations. In AMRAP 2, keep your sit-ups unbroken, manage grip on the KB swings with smooth hip drive, and maintain form on the push-ups. Each round is a short sprint—work to minimize transitions and keep moving. Use your rest to breathe and mentally prep.

Strategy and Finish

Think of each 4-minute block as its own challenge. Start each AMRAP with a plan: unbroken reps early, intentional pacing, and short rests only when necessary. Track your rounds and push to match or beat them on the second go. The grind is real—but smart pacing and hustle in transitions will pay off.

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What is an "amrap" workout?

An AMRAP workout — short for "As Many Rounds (or Reps) As Possible" — is a popular format in CrossFit workouts and functional fitness training. In an AMRAP CrossFit workout, you’re given a set amount of time (e.g., 10, 12, or 20 minutes) to complete as many rounds or repetitions as possible of a specific set of exercises.

This training style is known for being simple, scalable, and highly effective. Whether you're performing a bodyweight circuit or combining barbell and cardio movements, an AMRAP workout pushes your limits and helps build endurance, strength, and mental toughness.

Why Choose an AMRAP CrossFit Workout?

  • Time-efficient: Great for busy schedules — you know exactly how long the workout takes.

  • Self-paced intensity: Go as hard as you can or focus on movement quality depending on your goal.

  • Easy to scale: Modify weights, reps, or movements to fit your fitness level.

  • Motivating structure: The challenge to beat your previous round count adds a competitive edge.

Whether you're training at home or at your CrossFit box, an AMRAP workout is a fun and functional way to boost your fitness, track your progress, and build resilience. Explore our library of AMRAP CrossFit workouts and get inspired to move!

What kind of exercises are in this workout?

  • sit-up

    Sit-ups are a classic core exercise where the athlete moves from a lying position to an upright seated position, engaging the abdominal muscles throughout. A common feature in sit-up workouts, this foundational movement builds endurance and strength in the front of the core.

    In this workout, sit-ups target the rectus abdominis and hip flexors, improving trunk flexion and midline control. They’re easy to scale, require minimal space, and can be performed for reps, speed, or volume—making them a versatile choice for conditioning and core development.

  • Box jump

    The box jump is a plyometric movement that builds explosive power, coordination, and lower body strength. It’s a key component in many high-intensity box jump workouts, often used to develop speed, agility, and stamina.

    In this workout, box jumps challenge your legs, core, and cardiovascular system, while also training quick reaction and balance. Whether performed at a moderate pace or in sprint intervals, the box jump is a powerful tool for improving athletic performance.

  • kettlebell swing

    The kettlebell swing is a powerful hip-hinge movement that builds posterior chain strength, core stability, and cardiovascular endurance. A go-to in any kettlebell swing workout, it’s known for improving explosiveness, grip, and conditioning in one efficient motion.

    In this workout, kettlebell swings train your glutes, hamstrings, and shoulders, while developing rhythm and control. Whether Russian or American style, the kettlebell swing is a versatile tool for both beginners and advanced athletes.

  • push up

    The push-up is a foundational bodyweight movement that strengthens the chest, shoulders, triceps, and core. A staple in any push-up workout, it’s effective, scalable, and requires no equipment — making it perfect for all fitness levels.

    In this workout, push-ups develop upper body endurance, stability, and control, especially under fatigue. Whether performed strict, hand-release, or elevated, the push-up is a timeless movement that builds strength and resilience.

  • shuttle run

    The shuttle run is a high-intensity, agility-based movement that involves running back and forth between two points. Common in shuttle run workouts, it develops speed, acceleration, change-of-direction skills, and aerobic capacity.

    In this workout, shuttle runs challenge your footwork, coordination, and cardiovascular endurance—especially when combined with strength movements. Whether done for distance, time, or reps, the shuttle run is a simple yet effective way to improve athletic conditioning.

  • dumbbell clean and jerk

    The dumbbell clean and jerk is a dynamic, full-body lift that moves a dumbbell from the ground to overhead in two explosive phases. Common in dumbbell clean and jerk workouts, it challenges coordination, strength, and stability—especially when performed unilaterally or for high reps.

    In this workout, dumbbell clean and jerks train explosive power, overhead control, and core engagement. They also develop shoulder and hip resilience while reinforcing proper movement patterns under fatigue. Whether used in strength work or metcons, this lift is functional, scalable, and highly effective.

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