Jack Plank
- Músculo objetivo
- Gluteus Medius, Pectoralis Major Sternal Head
- Músculos sinergistas
- Deltoid Anterior, Gluteus Maximus, Obliques, Pectoralis Major Clavicular Head, Tensor Fasciae Latae, Triceps Brachii
- Equipamiento
- Body weight
- Parte del cuerpo
- Waist
- Tipo
- Strength
The Jack Plank combines a high plank hold with a jumping-jack leg movement, primarily targeting the gluteus medius and lower chest (pectoralis major sternal head). Synergists include the anterior deltoid, gluteus maximus, obliques, upper chest, tensor fasciae latae, and triceps brachii. It is effective for building core stability, hip abductor strength, and upper-body endurance simultaneously.
Cómo hacer el Jack Plank
- 1Start in a high plank position with your hands directly under your shoulders, arms fully extended, and your body forming a straight line from head to heels.
- 2Engage your core, squeeze your glutes, and press the floor away with your palms to activate the chest and triceps.
- 3Keep your hips level and your neck neutral — eyes focused on the floor just ahead of your hands.
- 4Jump both feet out wide to the sides simultaneously, as if performing the lower half of a jumping jack.
- 5Land softly on the balls of your feet with your legs spread wider than shoulder width.
- 6Immediately jump both feet back together to return to the starting plank position.
- 7Maintain a rigid torso throughout — do not let the hips rise or sag as the feet move.
- 8Continue jumping the feet out and back for the target number of reps or time, keeping each rep controlled and evenly paced.
Consejos de técnica
- Brace your abs as if bracing for a punch before each rep to protect the lower back and keep the hips stable.
- Keep your shoulders stacked directly over your wrists throughout the movement — do not let them drift forward or back.
- Land with soft knees each time to absorb impact and reduce stress on the joints.
- Focus on driving the feet outward from the hips rather than letting the movement collapse inward at the knees.
- If the jumping version is too intense, step one foot out at a time instead of jumping both feet simultaneously.
Errores comunes
- Letting the hips pike upward when the feet jump out — this reduces core engagement and shifts load away from the target muscles.
- Allowing the lower back to sag toward the floor — this places excessive stress on the lumbar spine and signals a loss of core tension.
- Flaring the elbows outward — this strains the wrists and shoulders; keep elbows soft and tracking over the wrists.
- Rushing the reps without control — fast, sloppy foot landings increase joint impact and reduce time under tension for the glutes and obliques.
- Holding the breath during the movement — this spikes intra-abdominal pressure and accelerates fatigue; exhale as the feet jump out and inhale as they return.
Preguntas frecuentes
What muscles does the Jack Plank work?
The Jack Plank primarily targets the gluteus medius and the lower chest (pectoralis major sternal head), which work isometrically to support the plank position. The anterior deltoid, gluteus maximus, obliques, upper chest, tensor fasciae latae, and triceps brachii all assist as synergists.
Is the Jack Plank good for the core?
Yes. Maintaining the plank position while the legs move laterally forces the obliques and deep core stabilizers to resist rotation and extension, making it an effective anti-rotation and core-stability drill.
How many reps or how long should I do Jack Planks?
Common prescriptions are 20–30 total reps (each out-and-back counts as one rep) or 30–60 seconds of continuous effort. Adjust volume based on your fitness level and where the exercise falls in your workout.
Can I do the Jack Plank if I have wrist pain?
If wrist pain is an issue, try performing the exercise on your fists or forearms to keep the wrist in a neutral position. You can also use push-up handles to reduce wrist extension stress.
What is the difference between a Jack Plank and a plank jack?
They are the same exercise — the terms are used interchangeably. Both describe starting in a high plank and repeatedly jumping the feet out wide and back in, mimicking the lower-body motion of a jumping jack.
