The hover jack is a bodyweight plank jack performed from a high plank hover, hopping the feet out wide and back together while the trunk stays level, training the abs and hip abductors. Where ahalf jackswings the legs under an upright torso, the hover jack asks the same leg action of a body held horizontal on the hands, so every hop tries to sag the hips or rock the shoulders and the trunk has to refuse. The shoulders load through a straight arm the whole time. Coaches place it in a core circuit or a bodyweight conditioning block.
What Muscles Does the Hover Jack Work?
- Primary: Rectus abdominis, transverse abdominis (deep core)
- Secondary: Gluteus medius (side glute), hip adductors, anterior deltoid
- Tertiary: Serratus anterior, quadriceps, gastrocnemius (calves)
How Do You Set Up for the Hover Jack?
Kneel on a floor that grips your shoes and place your hands under your shoulders, fingers spread. Step both feet back until the body forms one line from head to heels, feet together and toes tucked. Push the floor away so the upper back is broad, pull the ribs down and squeeze the glutes so the hips sit level with the shoulders. Set your gaze at the floor just ahead of your hands.
How Do You Perform the Hover Jack?
- Lock the plank with the hands under the shoulders, hips level and the feet together on the toes.
- Hop both feet out to a stance a little wider than your shoulders, keeping the knees soft.
- Land on the toes with the hips exactly where they were, no rise and no sag, and the shoulders still over the hands.
- Hold the wide position for a beat, feeling the abs brace against the pull of the wider base.
- Hop the feet back together, landing quietly on the toes with the legs straight.
- Re-check the line from head to heels with the feet together before the next hop.
What Are the Key Form Cues?
- Hips do not bounce: the feet move and the pelvis stays at one height; imagine a glass of water balanced on your lower back.
- Push the floor away: keep the shoulders pressing down into the hands so the upper back does not sink between the blades as the feet land.
- Land on the toes with quiet feet; noise means the knees are stiff and the impact is going into the wrists.
- Keep the ribs pulled toward the pelvis through the hop, not just at the start.
- Breathe out as the feet land wide and in as they come back together.
What Are the Most Common Mistakes?
- Letting the hips pike up as the feet go out: the abs unload and the shoulders take the rep; keep the pelvis level with the shoulders.
- Sagging the lower back on the landing: the lumbar spine takes the hop as extension under load; squeeze the glutes and pull the ribs down.
- Hopping the feet too wide: the hips drop and the legs slap the floor, breaking the rhythm; land just outside shoulder width.
- Rocking the shoulders forward over the hands: the wrists take the body weight and the plank shortens; keep the shoulders stacked over the palms.
- Rushing the reps into a bounce: the trunk never sets between hops and the exercise turns into a leg drill; pause a beat at each position.
What Are the Best Hover Jack Variations?
- Step-out hover jack: step one foot out and back at a time, a no-impact regression.
- Forearm hover jack: perform the hops from a forearm plank to load the abs more and the wrists less.
- Hover jack to mountain climber: after each jack, drive one knee toward the chest, the harder combination.
- Single-leg hover jack: hop one foot out while the other stays planted, alternating sides each set.
- Half jack: the same jumping leg pattern from a standing position for lifters not ready to hold the plank.
How Do You Progress the Hover Jack?
- Add difficulty by moving to the forearm version, or raising the feet onto a low box, once 60 seconds on the hands stays level.
- Build from 10 hops per set to 20 before making the drill harder.
- Add a third or fourth set, or a second circuit round, when two sets leave the abs fresh.
- Slow the hops to one per second, or hold the wide position for two seconds.
How Should You Program the Hover Jack?
Use the hover jack as a station in a core circuit or a bodyweight conditioning block, after the main lifts, two to three times a week. Work 3 to 4 sets of 10 to 20 hops, or 20 to 40 seconds, with 30 to 60 seconds of rest. Pair it with a glute bridge or a squat hold so the trunk recovers while the hips work.