Donkey kicks with Smith Machine resistance turn a bodyweight glute classic into a loaded exercise you can progress for years. The guided bar handles balance, so your glutes get the work while the rails keep every rep on the same path.
This guide covers what the movement is, the muscles it trains, step-by-step form, loading, programming, common mistakes, and how to pick a machine for home glute training.
Quick Answer: Smith machine donkey kicks are a loaded hip extension performed with your foot pressed against the guided bar, driving it back and up with your heel. They train the gluteus maximus through progressive overload, and you should start with the empty bar for 3 sets of 10 to 12 reps per side.
Key Takeaways
- Prime mover: The gluteus maximus drives every rep, with the hamstrings, gluteus medius, and core assisting through hip extension.
- Research-backed: One EMG study found loaded prone hip extension produced 100.7% of MVIC gluteus maximus activation, the highest of the exercises tested.
- Start light: Begin with the empty bar and add small plates only after you complete 3 sets of 10 to 12 reps per side with clean form.
- Setup matters: Set the bar just below hip height, keep your hips square to the floor, and drive through the heel without arching the lower back.
- Safety first: Stop the set for sharp pain, numbness, or tingling in the lower back, hip, or knee, and reduce the load before returning.
What Are Smith Machine Donkey Kicks?
Smith machine donkey kicks are a loaded glute exercise where you press the guided bar away with one foot. The fixed vertical bar path removes balance demands, so the movement pattern stays consistent rep after rep.
The bodyweight donkey kick is a quadruped hip extension drilled on hands and knees, and it has long been a glute training staple because it is simple and joint friendly. The Smith machine version keeps that hip extension pattern but adds external load through the bar, which is what drives progressive overload over months of training.
- Bodyweight base: The classic donkey kick trains hip extension with no equipment, which makes it a safe starting point for beginners.
- Loaded upgrade: Pressing against the padded bar lets you add small plate increments, turning a warmup drill into a true hypertrophy accessory.
- Guided bar path: The rails fix the movement arc, so the target glute works instead of the stabilizers a free weight variation would demand.
Any Smith machine with a low bar setting supports the movement, and the multifunctional Smith machine is a popular pick for home lifters who want one station for glute work and everything else.
What Muscles Do Smith Machine Donkey Kickbacks Work?
The gluteus maximus is the prime mover in every Smith machine donkey kickback. The hamstrings, gluteus medius, and core assist, while the erector spinae holds your spine neutral.
Research on hip extension patterns backs up the glute focus. One EMG study found loaded prone hip extension produced the greatest gluteus maximus activation of the exercises tested at 100.7% of MVIC, while a forward step-up reached just 28.7%[1].
- Gluteus maximus: Extends the hip and takes the bulk of the load, and it is the muscle that grows visibly with consistent training.
- Hamstrings: Assist hip extension, especially when your working knee stays slightly bent so they do not dominate the rep.
- Gluteus medius: Keeps your hips square to the floor and prevents the working side from rotating open.
- Core and erector spinae: Brace your trunk isometrically so force travels through the hip instead of the lower back.
Keep the movement honest and the glute stays the star. Chasing heavy loads usually shifts work to the hamstrings and lower back, which defeats the purpose of an isolation accessory.
Training in the floating range means your primary movers and the stabilizing muscles around the lift both have a job to do. For hypertrophy work at moderate to sub-maximal loads, that middle ground produces a training feel that is genuinely different from a standard Smith machine.
BJ Nelson, Head of Field Testing at The Iron Clinic, in a RitFit M2 Pro 3D review
How Do You Do Donkey Kicks With a Smith Machine Step by Step?
Set the bar just below hip height and press it back and up with your heel from a hinged stance. The fixed rails keep the bar path vertical so you can focus on squeezing the glute at the top.
- Step 1: Lock the bar at the lowest setting just below hip height and slide on a bar pad so the pressure lands on your heel, not the arch of your foot.
- Step 2: Stand facing the machine, fold forward at the hips with a flat back, and rest your hands on the frame or your thighs for support.
- Step 3: Press the sole of one foot into the padded bar and plant the other foot firmly with a soft knee.
- Step 4: Extend the working hip to press the bar back and slightly up, squeezing the glute hard at full extension without arching your lower back.
- Step 5: Return the bar over a two second count, keep tension on the glute, and finish the set before switching sides.
Two setup details protect your lower back. Keep your hips square to the floor rather than letting them rotate open, and stop the press at the height where your glute runs out of range of motion instead of swinging for extra height.
The full body demo below shows how the guided bar behaves in a real home gym session, including lower body accessory work around a Smith machine.
How Much Weight Should You Use for Smith Machine Donkey Kickbacks?
Start with the empty bar and add small plates only after every rep stays clean. Most beginners progress well with 3 sets of 10 to 12 reps per side at a controlled tempo.
Lowering speed matters more than most lifters expect. A 2022 study found eccentric-phase gluteus maximus activation was 18.1% higher under inertial loading than gravitational loading during hip extension exercises, which supports treating the lowering phase as half the exercise rather than a reset[2].
- Starting load: Use the empty bar for your first session, then add the smallest plate pair you own, commonly 5 lb pairs, once form holds.
- Progression trigger: Add load only after you complete all sets with square hips, a neutral spine, and a full glute squeeze on every rep.
- Tempo target: Press with control, squeeze at the top, and lower over a two second count to keep tension on the glute.
- Effort ceiling: Stop adding weight when the hamstrings or lower back start taking over, even if the reps still move.
Single-joint glute work responds to patient small jumps, not big leaps. A pair of small plates added across weeks of clean training beats a rushed max attempt that wrecks your setup.
Are Smith Machine Donkey Kicks Better Than Cable Kickbacks?
Neither is universally better, because the Smith machine wins on bar loading while cables win on constant tension. The right pick depends on which limitation matters less in your home gym.
| Factor | Smith Machine Donkey Kick | Cable Kickback |
|---|---|---|
| Resistance feel | Load tracks the bar path, with the hardest feel near the top of the press | Tension stays fairly constant through the whole arc |
| Loading jumps | Small plate increments on the bar | Pin or stack adjustments in seconds |
| Skill floor | Low, because the rails guide the path | Low to moderate, because you control the arc yourself |
| Best use | Heavy, controlled glute accessory on a Smith day | Finisher burnout or warmup activation |
Comparison reflects the general training characteristics of each tool, not lab measurements.
Many lifters eventually use both, since the two complement each other across a training week. If you want both options in one footprint, the M1 Smith machine with cable crossover covers bar work and cable kickbacks on the same station.
How Do You Program Donkey Kickbacks Into a Glute Workout?
Program them as an accessory after compound lifts, using 3 sets of 10 to 12 reps per side. Two to three sessions per week works for most lifters, with at least one rest day between glute sessions.
Where a movement sits in your session shapes what it delivers. A 2021 study of fifteen resistance-trained women found the Romanian deadlift and 45-degree Roman chair back extension activated the gluteus maximus 94 to 140% more than a seated machine back extension at 6-RM loads, a reminder that exercise pattern and body position drive activation more than any single tool[3].
- Session slot: Run kickbacks after squats, hip thrusts, or Romanian deadlifts, when your glutes are warm and your technique is already dialed in.
- Substitute options: Glute bridges, hip thrusts, cable kickbacks, or banded donkey kicks cover the same pattern when the machine is busy.
- Progression path: Add a small plate, a rep, or a slower lowering phase each week before touching anything else.
- Deload signal: If the burn disappears and your lower back takes over, drop the load and rebuild the squeeze before progressing again.
Simple beats fancy in accessory work. Pick one kickback variation, progress it for six to eight weeks, and rotate only when progress stalls.
What Are the Most Common Mistakes, and When Should You Stop?
The most common mistakes are arching the lower back, rotating the hips open, and rushing load progression. Each one shifts work away from the glute and toward structures you did not mean to load.
- Back arching: Extending from the lumbar spine instead of the hip turns a glute exercise into a lower back grind, so shorten the range and reset your brace.
- Hip rotation: Letting the working hip open up steals tension from the glute and dumps it into the low back, so keep both hips square to the floor.
- Swinging the load: Fast, loose reps use momentum instead of muscle, and the two second lowering count is the simplest fix.
- Skipping the pad: Bare bar pressure on the heel or arch is uncomfortable and pulls your focus off the glute squeeze.
Some sensations mean stop, not push through. End the set and reduce the load if you feel sharp pain in the lower back, hip, or knee, and stop the session entirely if numbness or tingling shows up.
Muscle burn and next-day soreness are normal parts of glute training. Pain that lingers beyond a couple of days or returns every session deserves a professional look before you load the pattern again.
Which RitFit Smith Machine Should You Choose for Home Glute Training?
Choose by space, budget, and whether you want a weight stack, since every model supports donkey kicks. The differences that matter for glute training are bar access at low settings and how quickly you can switch between bar and cable work.
| Model | Best Fit | Why It Suits Glute Work |
|---|---|---|
| M1 Multi Functional Home Gym Smith Machine | First home gym in a garage or spare room | All-in-one footprint with cable options for kickback variations |
| M1 Pro Smith Machine Weight Stack Package | Lifters who want pin-loaded changes | Weight stack makes load jumps between sets nearly instant |
| M3 Power Rack Cable Crossover Smith Machine | Barbell lifters who want a rack too | Smith work, rack work, and cables in one station |
| Buffalo Smith Machine Home Gym Package | Households sharing one gym | One station covers glute work and full family training |
| PSR05 2.0 Pink Smith Machine | Design-led home gyms | Lat pulldown plus Smith bar in a statement finish |
Compare the full lineup, including current packages, on the RitFit Smith machine collection page.
Deeper dives help once you have a shortlist. The M1 multi functional home gym Smith machine suits first-time builders, the M1 Pro weight stack package rewards quick load changes, and the M3 power rack cable crossover Smith machine fits lifters who still want free weight work.
The Buffalo Smith machine package and the PSR05 2.0 pink Smith machine round out the range for shared gyms and design-led spaces.
Seeing the machine move is the fastest way to judge it. The review below walks through how a 3D Smith machine handles in a real garage gym.
FAQs About Smith Machine Donkey Kicks
Are Smith machine donkey kicks effective for glute growth?
Yes. Quadruped and prone hip extension patterns rank among the strongest gluteus maximus activators in EMG research, and one study found loaded prone hip extension produced the highest activation of the exercises tested. The guided bar lets you add load to that pattern in small, safe jumps.
How heavy should Smith machine donkey kickbacks be?
Start with the empty bar, then add small plates once every rep stays clean. Most beginners progress well holding a two second lowering tempo for 3 sets of 10 to 12 reps per side. Add load only when your hips stay square and your lower back stays neutral.
What muscles do Smith machine donkey kickbacks work?
The gluteus maximus is the prime mover, and the hamstrings, gluteus medius, and core stabilizers assist through every rep. The erector spinae works isometrically to hold your spine neutral while the fixed bar path keeps balance demands low so the target muscles get the loading.
Can beginners do donkey kicks with a Smith machine?
Yes. Beginners often progress faster with the guided bar because the fixed rails remove the balance requirement of free weights. Practice the bodyweight version on a mat first, then add light bar loading once the kneeling hip hinge feels stable, controlled, and pain free.
How often should you do Smith machine donkey kickbacks?
Two to three sessions per week works for most lifters, with the move placed after compound lifts like squats or hip thrusts. Treat it as an accessory using 3 sets of 10 to 12 reps per side, and leave at least one rest day between sessions.
When should you stop doing donkey kicks on a Smith machine?
Stop the set if you feel sharp pain in the lower back, hip, or knee. Muscle burn and next day soreness are normal, but joint pain, numbness, or tingling signals a form or load problem. Reduce the weight, reset your setup, and see a professional if pain persists.
Conclusion
Smith machine donkey kicks load a proven glute pattern with a bar path you can trust, and they earn a permanent slot as a lower body accessory. Set the bar low, keep your hips square, start with the empty bar, and let clean reps dictate every weight jump.
Build the rest of your setup around the training you actually do. Check the RitFit discount guide before you buy any machine or accessory, so your glute program and your budget both stay on track.
Disclaimer
This article is for general fitness information only and is not medical advice. Consult a qualified professional before starting a new training program, and stop any exercise that causes pain.
References
1. MacAskill MJ, Durant TJ, Wallace DA. Gluteal muscle activity during weightbearing and non-weightbearing exercise. Int J Sports Phys Ther. 2014;9(7):907-14. PMCID: PMC4275195
2. Martín-San Agustín R, Castillo-Ballesta L, Llobat Sancho J, Esbri-Navarro R, Sánchez-Barbadora M. Comparison of Electromyographic Activity During Hip Extension Exercises Under Gravitational or Inertial Loading Conditions. Sports Health. 2022;14(2):246-253. doi:10.1177/19417381211011407. PMCID: PMC8883425
3. Andersen V, Pedersen H, Fimland MS, et al. Comparison of Muscle Activity in Three Single-Joint, Hip Extension Exercises in Resistance-Trained Women. J Sports Sci Med. 2021;20(2):181-187. doi:10.52082/jssm.2021.181. PMCID: PMC8057707
