The Four Block Grinder - Crossfit Workout

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.

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.

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.

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.

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.

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.