Donkey kicks look louder than they are. Hands and knees. One heel drives toward the ceiling while the knee stays bent. The name is the donkey picture. The job is smaller: extend the hip without letting the low back finish the lift for you.
Donkey kicks are a quadruped hip-extension drill: bent knee, heel up, quiet spine, hips square. ACSM recommends resistance exercise for each of the major muscle groups on 2-3 days each week; that is not a donkey-kick prescription. That frequency line is in the Garber et al. ACSM position stand. It is population guidance for apparently healthy adults. It does not name this drill, set a thigh height, or clear a sore back.
If your home menu already has side-hip work, this drill sits beside it rather than replacing it. A side-lift that targets hip abduction is the fire hydrant. A floor hip drive with both feet down is the glute bridge. A wider home hip menu lives under hip exercises at home. Use donkey kicks when you want a short rear-hip set without a cable or machine.
People skip them because they look like warm-up homework. Fair. Squats and lunges still leave a gap when the rear hip never owns a quiet isolation pattern. You can squat with a sleepy glute and a busy low back. This drill makes that swap hard to ignore if you keep the spine honest.
How to do donkey kicks without turning them into a back arch
Set the floor before you chase height. Most fake reps are lumbar extension with a decorative knee.
Start in quadruped. Wrists under shoulders. Knees under hips. Spine quiet, not rounded and not arched into a hammock. Eyes toward the floor a short distance ahead of the hands. A light brace through the midsection is enough. You are not bracing for a max deadlift.
Bend the working knee to about 90 degrees and keep it there. That bend is the form cue. Straightening the knee turns the path into a more hamstring-heavy raise. The bent knee keeps the job closer to hip extension through the glute.
Drive the heel toward the ceiling. Think “press the sole up,” not “kick the room behind you.” Stop when the low back wants to arch or the ribs want to flare. That first compensation is your honest range today. Thigh near parallel to the floor is a useful target only if the pelvis stays quiet. A higher line with a hammock lumbar is not a personal record.
Hold the top for one quiet second if you can still feel the working glute. Lower in about two seconds. Touch the floor between reps when you are learning. Hover just above the mat only after the shape stays clean for a full set.
Finish one side before you switch. Equal work both sides. The weaker side usually wants to arch sooner. That is information, not a character flaw.
The ACSM position stand says the exercise program should be modified according to an individual’s habitual physical activity, physical function, health status, exercise responses, and stated goals. Read that boundary in the Garber et al. PubMed record. Use it as permission to shorten the lift, drop to forearms, or skip the pattern when a joint complains.
Breathing is a brace, not a contest. Exhale as the heel rises, or keep a steady hiss. Holding a breath for fifteen slow reps is theater. If you cannot breathe and keep the spine quiet, the set is too long or the top is too high.
Film five slow reps from the side. Watch for lumbar arch, hip twist, and knee straighten. Limit the working range to the zone that stays clean. Raise it later.
What donkey kicks load and what they leave alone
Donkey kicks are a hip-extension pattern. Small setup changes decide whether the glute owns the work or the low back steals it.
Gluteus maximus is the main character when the knee stays bent and the spine stays quiet. It is the large rear-hip muscle that extends the thigh. On this drill you feel it most when the heel drives up and the pelvis does not dump into anterior tilt.
Hamstrings still help as secondary hip extensors. Their share grows if the knee opens toward straight during the kick. That is why the 90-degree cue matters. You do not need zero hamstring involvement. You need the knee angle not to wander mid-rep.
The trunk braces. Deep abdominals and the muscles that keep the spine from extending hard work isometrically so the lumbar does not finish the lift. The supporting hip works to keep the pelvis from twisting toward the kicking side. If those braces fail, you get a prettier looking height and a quieter target muscle.
Shoulders carry bodyweight through the hands. Wrists load. A forearm base changes that demand without changing the hip job.
Gluteus medius is mostly a supporting actor here. It helps keep the pelvis from dumping sideways, but the main motion is extension, not abduction. If your goal is the outer hip that lifts the thigh sideways, use the fire hydrant. Pairing matters more than pretending one drill covers the whole glute complex.
Westcott summarized resistance-training health effects in a review; that paper did not test donkey kicks or a home hip-extension protocol. The Westcott 2012 abstract discusses lean mass and other outcomes after resistance training in general. It is useful context for why strengthening matters. It is not evidence that this kick recreates those results, and it is not an injury-prevention trial for this move.
This page will not invent EMG percentages for donkey kicks, or quote low-back pain reductions that no cited source measured for this pattern. Anatomy and coaching cues are not a substitute for those papers.
Donkey kick progressions that keep the spine honest
Progression here is ownership of range, not a race to a circus variation.
Small-range kick. Raise the thigh only through the zone you can keep without arching. Watch the low back. If it stays quiet and you can feel the glute, you already have a usable set. Ten to twelve reps per side is enough while you learn the shape.
Forearm base. Drop to the forearms if the wrists complain. The lift is the same. The base is quieter. Useful on hard floors and for anyone who loses trunk control the moment the hands are loaded.
Full honest range. Thigh closer to parallel, spine still quiet, fifteen or so controlled reps if the last one still looks like the first. The Physical Activity Guidelines for Americans say adults need muscle-strengthening activity on at least 2 days each week, plus aerobic minutes across the week. See the current guidelines overview. A few honest donkey kicks can sit inside a strengthening day. They are not the week, and they do not pay the walking minutes.
Band around the thighs. A light loop just above the knees adds demand as the hip extends. Garber and colleagues treat progressive overload as part of useful resistance training for adults; that is population guidance, not a band brand. If the band makes you arch earlier, the band is too strong or the range is too high.
Ankle weight. One to three kilograms on the working ankle is a direct load step. Use it only after bodyweight reps stay clean. Schoenfeld et al. (2015) compared low-load and high-load training for strength and hypertrophy in trained men; that paper is about loading principles in general, not a living-room kick trial. See PMID 25853914. If the weight makes the lumbar take over, the weight is ahead of the shape.
Fire hydrant into donkey kick. Abduct first, then from a quiet top transition into a short hip-extension kick, return, and reset. That pairing trains side-hip and rear-hip jobs in one sequence. It is also easy to turn into a floppy circus. Keep the hips square or split the moves into separate sets.
Choose the donkey kick version you can keep with a quiet spine and a bent knee; raise the heel or add a band only after that shape repeats. That choice is coaching, informed by the ACSM note that programs should follow function and health status (Garber et al.). It is not a tested universal ladder for this drill.
A long isometric hold at a mid-height you own is a useful endurance tool. It is not a substitute for walking minutes or for a real squat or hinge day.
Mistakes that turn donkey kicks into a low-back set
The fake high kick is almost always lumbar extension.
Low back finishes the lift. As the heel rises, the pelvis dumps into anterior tilt and the lumbar arches. The range looks bigger. The glute does less. Fix: lower the top until the belt line stays quiet. A phone clip from the side is blunt and useful.
Knee straightens mid-rep. The path drifts toward a prone raise and the hamstring share grows. Fix: set 90 degrees on purpose before you lift. Cue “the knee angle does not change.”
Momentum swing. Fast reps use a whip. Slow the tempo: about two seconds up, a one-second quiet hold, two seconds down. If you cannot own that pace, the set is too long or the range is too high.
Hip twists at the top. The working knee turns out and the pelvis follows. You get rotation theater instead of clean extension. Fix: keep the knee pointing toward the floor. Stop earlier if the hip wants to open.
Drop the eccentric. Letting the knee fall back skips the lowering phase. Count two seconds down. Continuous tension is more useful than a bounce.
Choose a lower top over a prettier Instagram line when the low back starts to arch. That decision is still coaching. Westcott’s review is about resistance training and health in general, not about spotting your set from a PubMed abstract (Westcott 2012).
Film five slow reps per side. Watch for arch, twist, and knee straighten. Limit the working range to the zone that stays clean. Raise it later. Next-day glute fatigue is common. Next-day lumbar stiffness usually means you arched instead of extended the hip.
Donkey kicks vs fire hydrant and glute bridge
Name the job first. The rest gets easier.
Hip extension with a bent knee points to donkey kicks. Side-hip abduction and a quieter pelvis in single-leg work points to the fire hydrant. A floor hip drive with both feet down points to the glute bridge. A mixed home menu rather than one drill tutorial points to hip exercises at home.
You can put donkey kicks and fire hydrants in the same session. Do the extension first if the rear hip is the priority that day. Do the side-lift first if your pelvis dumps during extension work. Stacking both into one long circuit that ends in form failure helps nobody.
A squat or lunge still belongs in the week. Donkey kicks do not replace them. They fill a gap those patterns often leave alone when the glute never owns a quiet isolation set. If you only have ten quiet minutes, do the kick, then one side-hip pattern, then stop. A longer circuit that finishes in a back arch is not more complete. It is just longer. Keep the comparison honest: three different jobs, three different drills, one week that still has a squat pattern somewhere.
Garber et al. describe resistance exercise as part of adult fitness, alongside cardiorespiratory, neuromotor, and flexibility training. That framing is in the 2011 ACSM position stand. This drill can sit in the strengthening bucket for the hips. It does not, by itself, cover the aerobic target in the same document.
WHO 2020 guidance likewise frames adult activity across the week, including muscle-strengthening on two or more days; it does not prescribe donkey kicks. See Bull et al. in the WHO 2020 guidelines record. Use that as weekly context, not as a living-room protocol.
What the evidence does not say about donkey kicks
Keep the claims small. Fitness posts will not.
Westcott (2012) reviewed health effects of resistance training; the paper did not measure donkey-kick form, gluteus maximus EMG for this move, or injury rates after this drill. Use the PubMed record as general background for why progressive strengthening matters. Do not read it as a donkey-kick trial.
Garber et al. (2011) give adult exercise-prescription guidance, including resistance work for major muscle groups on 2-3 days per week; that is not a donkey-kick protocol. Details sit in the ACSM position stand. Modify for health status and goals. A sore low back is a reason to change the plan, not to “push through for activation.”
The Physical Activity Guidelines for Americans ask adults for at least 150 to 300 minutes of moderate-intensity aerobic activity each week, plus muscle-strengthening on at least 2 days. See the official overview. Rear-hip sets can contribute to a strengthening day. They do not clear the aerobic floor, and they do not treat a diagnosed knee or back condition.
Schoenfeld, Ogborn, and Krieger (2017) described a dose-response relationship between weekly resistance-training volume and muscle mass gains across exercises in general; that meta-analysis is not a donkey-kick hypertrophy trial. Details sit in PMID 27433992. Bodyweight kicks alone will not satisfy every trainee’s weekly volume needs. Use them as accessory or activation work inside a broader plan.
No source on this page reports an EMG ranking for donkey kicks versus hip thrusts, bridges, or cable kickbacks. No source here reports a percentage drop in low-back pain from this drill alone. If another article invents those numbers, it is not citing the sources used here.
Athletic sprinting and lifting use hip extension. A stronger glute can support that. This page will not pretend a living-room kick is sprint training or back-pain care.
Programming donkey kicks in a short week
Treat donkey kicks as a short rear-hip block, not as the workout that has to do everything. Two strengthening days that already include some hip work are enough for most people who also walk. Garber et al. (2011) still recommend resistance work for major muscle groups on two to three days each week, and they ask you to modify the plan for health status and goals (PMID 21694556). Schoenfeld et al. (2015) remind you that load and effort interact for strength and size outcomes in trained men; that is a loading principle, not a kick schedule (PMID 25853914). Ainsworth et al. (2011) list MET values for broad activity codes; use that only as intensity class, not as a donkey-kick calorie number (PMID 21681120).
A sketch, not a prescription:
- Day 1: bilateral donkey kicks, 2-3 sets each side, slow tempo, stop before the arch. Rest until the supporting hip feels normal.
- Day 2: skip the kick. Walk, squat pattern, or a glute bridge if the floor is free.
- Day 3: repeat Day 1, or add a light band if yesterday’s shape stayed honest.
- Day 4: rest from loaded hip extension on the floor.
- Day 5: optional short pairing with fire hydrants, then stop.
Desk-heavy days may need a longer warm-up for the hips before quadruped work. Lifters who already do heavy hinges may find bodyweight kicks easy and still should not finish with an arch. Next-day glute fatigue is common. Next-day lumbar stiffness usually means you extended the spine instead of the hip.
Do not park a long donkey-kick block right after a heavy deadlift day when the back is already tired. Socks on a slick floor let the supporting knee skate; a mat or bare knee helps. Thick carpet hides the pelvis the same way a soft mattress hides a bridge.
When the glute gets hard, people lock a breath and then dump the lumbar. Keep a slow inhale and a longer exhale as you lift. If you cannot breathe and keep the spine quiet, the set is too long. Stop.
Skip the pattern after a recent hip flare a clinician has limited, pregnancy positions a clinician has limited, wrist pain that persists on forearms, dizziness on the floor, or chest pain. Those are not “lower the heel and hope” problems. Use a standing hip extension with a band if a clinician has cleared that, or rest.
If you coach someone else, ask for a quiet spine you can see before you ask for parallel. A quiet small-range set is better first homework than a high kick for the camera. Band next. Ankle weight last. Height is a score only after the lumbar stays quiet.
A clear patch of floor beats a crowded gym aisle for this. You can film the side view. Keep a note of which version you used (small-range, full, forearm, banded, ankle weight) so you do not “progress” by accident into an arch.
Kneeling on a folded towel changes comfort without changing the hip job. It is not a better donkey kick. If the towel lets you chase height while the back arches, you found a comfort trick, not a progression. Same rule as the rest of this page: quiet spine first, height second.
If you sit for long blocks, a short standing hip hinge or a gentle open-the-hip stretch before you kneel is a cheaper warm-up than a twenty-minute mobility rabbit hole. Then do the floor set. If the first rep already arches, you are not warmed up, or the top is too high. Lower it.
RazFit can keep a 1 to 10 minute bodyweight session, a timer, and easier variations in one iOS 26+ app, with a 3-day trial, then €2.99 a week or €29.99 a year. That is product design: 30 exercises and 32 badges on the current listing. It is not a measured glute-growth, injury-prevention, or hip-extension result for this drill, and it does not clear an injury.
Medical Disclaimer
Donkey kicks load the wrists, knees, and working hip. People with hip pain, knee conditions, wrist injuries, or a recent low-back flare should talk with a clinician before using this pattern. A forearm base reduces some wrist demand. A lower top reduces some lumbar demand. Stop immediately for sharp joint pain, chest pain, dizziness, or unusual breathlessness.
Start Training with RazFit
RazFit publishes short bodyweight sessions (1-10 minutes, no equipment) with progressions you can scale. That is product design, not a measured hip-extension outcome and not app telemetry. Available on the App Store for iPhone and iPad, iOS 26+, with a 3-day free trial.