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Booty Builder Selectorized Standing Hip Abductor

A supported standing hip-abduction exercise using a selectorized weight stack. Moving the thighs outwards trains the hip abductors, including gluteus medius and minimus, while the handles assist stability.
PRIMARY MUSCLE
Gluteus medius
SECONDARY MUSCLES
Gluteus minimus · Gluteus maximus (upper fibres) · Tensor fasciae latae
MUSCLES INVOLVED
Exercise Demonstration Watch the Movement
Technique

How to Perform

Follow the setup and execution sequence below before adding load or increasing training intensity.

01

Setup

Select a light resistance with the stack resting and fully insert the selector pin.
Use the handles to step onto the entry platform, then place each foot on its designated moving foot support. Position the outer thighs against the pads, just above the knees.
Choose a comfortable handle position and sit the hips back into a controlled bent-knee stance. Establish secure foot and pad contact before beginning.
  • Selector pin fully inserted.
  • Use the handles when stepping on.
  • Feet secure on the moving supports.
  • Outer thighs against the pads.
  • Comfortable bend at the hips and knees.
  • Test the position with light resistance.
Equipment & Machine Setup

FOOT SUPPORTS & PADS

Distinguish the entry platform from the moving foot supports. Keep each foot securely positioned and the outer thighs in contact with the pads.

HANDLES

Choose the side or centre handles according to comfortable reach. Use them for stability without pulling or swinging the torso to move the resistance.

WEIGHT STACK

Change resistance only when the stack is resting. Record the selected load and working position when tracking progression.

02

Execution

Press the thighs outwards against the pads, allowing the foot supports to move with the legs. Maintain the chosen hip and knee bend with a steady torso.
Open only as far as you can control without shifting sideways, twisting or losing foot contact.
Return inwards smoothly, resisting the pull of the machine. Repeat through a consistent range without bouncing or slamming the stack.
After the final repetition, gently close the pads and let the resistance settle. Keep hold of the handles while stepping back onto the entry platform and off the machine.
  • Press the thighs outwards.
  • Maintain secure foot and pad contact.
  • Keep the chosen hip and knee bend.
  • Avoid swinging or twisting the torso.
  • Use a comfortable, controlled range.
  • Resist the inward return.
  • Close the pads before stepping off.
Coaching Essentials

Key Coaching Points & Common Errors

Focus on these key coaching cues and avoid the common technical errors that can reduce control, efficiency, and consistency.

01

Key Coaching Points

  • Move the thighs rather than shifting the body sideways.
  • Keep both sides moving evenly.
  • Choose a load that allows the final repetition to resemble the first.
02

Common Errors

  • Swinging the torso to move heavier resistance.
  • Forcing extra width by twisting or losing foot contact.
  • Turning each repetition into a squat unintentionally.
  • Letting the pads snap back together.
Important Considerations
The bent-knee abduction and abduction-plus-squat versions are different movements. Keep the chosen version consistent when tracking progress.
Changing torso lean or toe angle has not been shown to isolate a particular glute region on this machine. Use a comfortable position rather than forcing an exaggerated posture.
Standing abduction is an alternative to seated abduction; superior muscle growth or injury prevention has not been established for this model.
Movement Science

Anatomy & Biomechanics

Understand the muscles, joints and movement mechanics involved in the exercise, including how the body creates force, maintains control and completes each repetition.

Anatomy
Gluteus medius and minimus contribute to moving the thighs outwards and controlling the pelvis. Tensor fasciae latae also assists hip abduction. Other hip, trunk and leg muscles help maintain the supported bent-knee position.
  • Gluteus medius and minimus contribute to outward thigh movement.
  • The upper fibres of gluteus maximus assist hip abduction.
  • Tensor fasciae latae also contributes to the movement.
  • Trunk and leg muscles maintain posture while the thighs move.
Biomechanics
The thighs press outwards against the pads while the foot supports move with the machine arms. Holding a consistent hip and knee bend keeps the movement focused on hip abduction. Adding a squat introduces hip and knee extension.
Hip position can change muscle activity. Laboratory testing found greater gluteus maximus and tensor fasciae latae activity at 45° of hip flexion than in less-flexed positions. This does not demonstrate reduced gluteus medius or minimus contribution, or greater muscle growth on this machine.
  • More hip flexion increased gluteus maximus and tensor fasciae latae activity in the tested laboratory positions.
  • A decrease in gluteus medius or minimus contribution is not established.
  • Leaning the torso forwards does not necessarily increase hip flexion if the movement comes from rounding the back.
  • Pad position, body proportions and machine leverage affect the effort required at the hips.
  • Keep the working position consistent when comparing loads and repetitions.
Practical Application

Variations & Programming

Explore useful exercise variations and learn how the movement can be selected, adapted and programmed according to your training goal, experience and individual needs.

Variations
  • Standing hip abduction with a brief pause before returning inwards.
  • Hip abduction combined with a squat. This adds hip and knee flexion and extension and requires separate technique instructions.
Programming
  • Supplementary hip-abductor strength and hypertrophy work.
  • Additional glute training alongside squats, hinges or hip thrusts.
Typical Rep Range 10–15+.
Programming Note
Choose a load that allows controlled repetitions through a comfortable range. Finish challenging sets with a few good repetitions remaining. Increase repetitions before adding weight, keeping the working position consistent.
Use the squat combination as a separate variation and record it separately. Pauses are optional and have not been shown to produce greater muscle growth on this machine.
Workout Application

Training Considerations

Use these guidelines to adapt the exercise to individual needs, experience and tolerance.

Use Caution When
  • Hip or knee pain during outward movement.
  • Painful pressure from the pads.
  • Difficulty maintaining balance or stepping on and off safely.
Possible Modifications
  • Reduce the selected resistance.
  • Use a smaller, comfortable range.
  • Adjust the working stance or choose seated abduction if standing is uncomfortable.
Safety Note
Fully insert the selector pin and change resistance only with the stack resting.
Keep hands clear of moving arms and foot supports.
Close the pads under control before stepping off, using the handles for support.
Stop for sharp pain or loss of control.