10 Best Exercise Machines For Knee Replacement in 2026

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The Cubii Move Under Desk Elliptical is our Best Overall pick. It delivers whisper-quiet, low-impact motion that spares a healing knee while fitting under any desk. For those in the first weeks of rehab, the OPTP Knee Glide by Bob and Brad offers targeted range-of-motion work, and the Sunny Health & Fitness Smart Magnetic Recumbent Bike provides stable, seated cardio with adjustable resistance.

Recovering from knee replacement means finding movement that rebuilds strength without jarring the joint. The right machine lets you control the range of motion, keep impact near zero, and stay consistent even when fatigue sets in.

We researched specifications, manufacturer details, expert round-ups, and patterns in owner feedback to build this guide. You get ten machines covering every stage of recovery, from bed-based leg presses to fully adjustable recumbent bikes.

Top 10 Exercise Machines For Knee Replacement in the Market

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The Best Exercise Machines For Knee Replacement, Reviewed

#1Best Overall

Cubii Move Under Desk Elliptical

Cubii Move Under Desk Elliptical
DimensionsL 19.7 x W 9.4 x H 21.7 in
Weight17.6 lb
DisplayLCD (stride count, mileage, duration, calories)
MotionLow-impact elliptical
Muscle groups6 key muscle groups
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What We Like

  • Ultra-quiet under-desk operation
  • Low-impact elliptical motion spares joints
  • Compact footprint fits small spaces
  • LCD tracks stride count and calories

Trade-offs

  • Seated use only, no standing option
  • No adjustable resistance level mentioned
  • App integration requires manual data entry

At just 17.6 pounds, the Cubii Move is light enough to carry from room to room and compact enough to tuck under most desks or tables. You can pedal while you work or watch TV. Its smooth elliptical motion supports leg strength and mobility through low-impact seated exercise, which means you get a gentle workout that doesn’t stress your joints, knees, or back. The built-in LCD tracks your stride count, mileage, duration, and calories burned, letting you monitor progress without pulling out your phone.

Compared to the Sunny Health & Fitness Smart Mini Exercise Bike, which offers 8 levels of magnetic resistance, the Cubii is simpler but also lighter and quieter. That makes it easier to keep at your desk and use daily. Reviewers note that this is a straightforward, no-frills machine focused on gentle, consistent motion for building mobility without complexity.

Best for: Someone who wants a whisper-quiet, compact elliptical for seated exercise at a desk or in a chair. Not ideal for those who need progressive resistance or a standing workout.
#2Best Compact Mini Bike

Sunny Health & Fitness Smart Mini Exercise Bike

Sunny Health & Fitness Smart Mini Exercise Bike
DimensionsL 21.6 x W 18.7 x H 14.4 in
Weight20.5 lb
Resistance Levels8 magnetic
Resistance BandsIncluded (20 lb)
Digital MonitorScan, Speed, Time, Distance, Calories
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What We Like

  • 8-level magnetic resistance for quiet operation
  • Includes 20 lb resistance bands for arm work
  • Free SunnyFit app with 1,000+ workouts
  • Compact and portable with built-in handle

Trade-offs

  • Seated-only design limits standing or full-leg extension
  • At 20.5 lb, heavier than some under-desk bikes

The 8 levels of magnetic resistance adjust smoothly with a simple dial, so you can go from easy pedaling to a more challenging ride without any loud clanking. That quiet operation makes it practical for use at a desk or while watching TV without disturbing others. The included 20 lb resistance bands let you work arms and legs together or separately, turning this into a versatile machine for a full-body workout. It’s compact enough to store under a desk or in a closet, and the digital monitor tracks scan, speed, time, distance, and calories burned without needing the app if you prefer simple tracking.

At 20.5 pounds and 14.4 inches tall, this mini bike is light enough to carry with one hand and short enough to slide under most desks. You can pedal while you work or watch TV. It won’t give you the same seated position as a full-size recumbent bike. The Sunny Health & Fitness Smart Magnetic Recumbent Bike, for instance, weighs 100 pounds and takes up much more floor space, but that’s the point. If you want low-impact movement without dedicating a room to it, this little unit lets you bring out a workout whenever you have a few minutes.

Best for: Someone who wants a quiet, compact way to do low-impact seated pedaling and light arm work at home or under a desk. Not ideal for those who need a full-size stationary bike or a standing exercise position.

Product photos

#3Best For Post-Surgery Rehab

OPTP Knee Glide by Bob and Brad

OPTP Knee Glide by Bob and Brad
Length32 inches
Width5 inches
Height5.5 inches
Made InUSA
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What We Like

  • Designed for seated leg extension and flexion
  • Suitable for ACL, PCL, hip, and shoulder rehab
  • Includes instructions for home or clinic use

Trade-offs

  • No resistance levels for progressive strengthening
  • At 32 inches long, it needs floor space to glide
  • Requires user to sit and push manually

The 32-inch glide path lets you perform controlled leg extensions and flexions while seated, which is exactly the kind of low-impact, range-of-motion work your knee needs in those early weeks after replacement. Bob and Brad designed it for multiple surgeries (ACL, PCL, hip, rotator cuff), so it pulls double duty if you’re recovering from more than just a knee procedure. For someone fresh out of surgery who needs to start moving safely without standing or balancing, this is a gentle, straightforward tool that follows physical therapy instructions closely.

The trade-off is that there’s no adjustable resistance, you’re only working against your own leg weight and friction on the floor. That makes it ideal for the first month or two of rehab. But once you need to rebuild strength beyond basic motion, you’ll likely graduate to something like the Cubii Move Under Desk Elliptical, which adds smooth, seated pedaling with more challenge. Still, for the fragile early stage when pushing too hard can set you back, the simplicity of this glider is actually a strength: no knobs, no magnets, no confusion, just slide and repeat. It’s a narrow tool, but for that narrow window, it’s exactly what the doctor ordered.

Best for: Anyone in the first weeks of knee replacement rehab who needs a portable, low-impact seated glider for regaining range of motion. Not ideal for building progressive leg strength beyond basic flexion and extension.
#4Best Recumbent Bike

Sunny Health & Fitness Smart Magnetic Recumbent Bike

Sunny Health & Fitness Smart Magnetic Recumbent Bike
Dimensions66.9 x 32.7 x 50.6 inches
Weight100.0 pounds
Resistance Levels12-Level Magnetic
App CompatibilitySunnyFit App with 1000+ videos
DesignStep-Thru, Recumbent
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What We Like

  • Step-thru design for easy mounting
  • 12-level magnetic resistance for gradual intensity
  • Full-body training with moving arm handles
  • Low-impact motion protects healing joints

Trade-offs

  • At 100 lb, it's heavy to move around
  • Arm handles move when pedaling stops
  • Large footprint needs dedicated floor space

A 12-level magnetic resistance system means you can dial the intensity from a gentle spin to a solid cardio challenge without sudden jolts. The step-thru frame makes getting on and off feel safe and stable, and the recumbent seat keeps your hips and lower back supported while your legs do the work. It suits anyone who wants a full-body workout with low-impact motion, and the SunnyFit app adds guided video sessions so you never have to guess what to do next.

At 100 pounds and nearly five and a half feet long, this bike demands a permanent home, it’s not something you can slide under a desk or stash in a closet. Moving it to another room really calls for a second person. The Cubii Move Under Desk Elliptical, by contrast, weighs just 17.6 pounds and fits easily under a desk, but it’s designed for seated lower-body pedaling only. If you have the space and want a machine that works your upper body too, with 12 levels of magnetic resistance, this bike delivers.

Best for: A person who wants a stable, low-impact recumbent bike with adjustable resistance for gradual progression and full-body training. Not ideal for those with very limited floor space or who need a portable machine to move between rooms.

Product photos

#5Best Motorized Option

Exerpeutic 2000M Motorized Under Desk Bike

Exerpeutic 2000M Motorized Under Desk Bike
Dimensions21.0 x 18.2 x 14.5 inches
MotorizedYes, with overload protection
Speed ControlHand-held remote, 6 ft cord
DisplayLCD: distance, time, calories, reps
PedalsFoldable with adjustable straps
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What We Like

  • Motor assists recovery when legs tire
  • Overload protection stops cranks safely
  • Foldable pedals with straps prevent slipping
  • Carry handle and floor mat included

Trade-offs

  • 15-minute auto timer limits longer sessions
  • Motor off mode has more resistance, not less
  • No seat or base, requires a chair or desk

A motor that actively turns the pedals is the key feature for anyone with limited mobility or recovering from an injury. The handheld remote lets you adjust speed without bending over, so you can maintain a comfortable pace. Overload protection stops the cranks if your legs can’t keep up, which adds a layer of safety during use. This makes it a practical choice for seated use at a desk or in a chair, where you want low-impact movement without forcing a painful range. The LCD shows distance, time, calories, and reps, giving you basic progress tracking without complexity.

The Exerpeutic 2000M’s motor assistance is its key feature. If you need help getting started with gentle motion, that motorized help is worth the extra step of restarting the 15-minute auto timer for longer sessions. Compare that to the Cubii Move, which has no motor and relies entirely on your own effort, making it a different tool for those who prefer self-powered exercise. The Exerpeutic also doesn’t include a seat or frame, so you’ll need a stable chair or desk to use it.

Best for: Someone with limited mobility or in rehabilitation who needs motor-assisted pedaling for low-impact seated exercise. Not ideal for those who want a fully self-powered workout or a standalone machine with a built-in seat.
#6Best Adjustable Senior Bike

MDODM Pedal Exerciser Bike for Seniors

MDODM Pedal Exerciser Bike for Seniors
Height range31 to 43 inches
Base length15.7 to 21.5 inches
Weight15.6 pounds
Frame materialThickened steel tubing
Resistance typeAdjustable knob on handles and pedals
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What We Like

  • 5-level height adjustment for handlebar and pillar
  • Stepless base length adjustment for different body types
  • Non-slip suction cups for floor stability

Trade-offs

  • 40.5-inch height limits under-desk placement
  • 15.6-pound weight makes it less portable

A 31- to 43-inch adjustable height range means this pedal exerciser can work for someone in a standard chair or a taller armchair. That matters a lot after knee replacement when you need to keep your operated leg moving without bending too far. The thickened steel tubing and triangular base with four suction cups keep it planted on hard floors, so you can focus on gentle pedaling rather than chasing a sliding machine.

The trade-off is that the 15.6-pound frame uses suction cups for grip on hard floors. On thick carpet it might not stay as steady. If you need whisper-quiet operation and a compact profile that fits under a desk, the Cubii Move is a quieter alternative, but it doesn’t offer the upper-body handlebars or massage function that the MDODM provides for total-body seated rehab.

Best for: Seniors and post-knee-replacement users who want a fully adjustable seated bike with arm and leg options. Not ideal for anyone needing a machine that stays put on thick carpet.

Product photos

#7Best Compact Design

AN Under Desk Bike Pedal Exerciser

AN Under Desk Bike Pedal Exerciser
Dimensions20.0 x 9.0 x 15.0 inches
Resistance TypeAdjustable turn-knob
DisplayLCD: time, count, distance, calories
Use PositionsFloor (legs) or table (arms)
Non-slip featuresWidened pedals, straps, rubber feet
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What We Like

  • Whisper-quiet pedaling for office use
  • Adjustable resistance via turn-knob
  • Compact size fits under desks or sofas
  • Dual use for legs or arms

Trade-offs

  • No motorized assistance for passive rehab
  • Lacks full-body upper support like recumbent bikes
  • Pedal-only motion limits range-of-motion variety

The compact size of this pedal exerciser makes it easy to place on the floor for leg pedaling or on a table for arm exercise while you work, read, or watch TV. The whisper-quiet operation means you can pedal without distracting others nearby, and the adjustable resistance knob lets you customize your workout intensity from light to more challenging. For someone who wants to add low-impact movement to their daily routine without needing a large machine, this is a practical way to stay active while seated.

If you’re able to pedal on your own, this non-motorized unit offers a compact way to exercise legs or arms on the floor or a table. That’s a different approach from the Nobol PhysioPedal Premium Motorized Exerciser, which includes adjustable speed and resistance with a remote control. For someone who wants simple, self-powered movement without extra electronics, this design keeps things straightforward and space-efficient.

Best for: Anyone who wants a compact, quiet pedal exerciser for low-impact leg or arm workouts at a desk or beside a chair. Not ideal for those who need motorized assistance to move their limbs.

Product photos

#8Best Full-Body Rehab

Birdfeel Recumbent Exercise Bike with Arm Exerciser

Birdfeel Recumbent Exercise Bike with Arm Exerciser
DimensionsL 24.6 x W 55.1 x H 47.2 in
Weight53.1 lbs
Max Weight400 lbs
Resistance8-level magnetic, silent
DisplayLCD: speed, time, distance, calories
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What We Like

  • Synchronized arm and leg movement
  • 400 lb heavy-duty steel frame
  • 8-level silent magnetic resistance
  • Adjustable padded seat and backrest

Trade-offs

  • At 53.1 lb, it's not easily portable
  • 55.1-inch length needs dedicated floor space
  • No pulse sensors or heart rate tracking

A 400-pound weight capacity on a recumbent bike with synchronized arm and leg motion means this machine supports serious rehab for a wide range of body types without wobble or strain. The low-impact design and cushioned, adjustable seat let you work your core, arms, and legs from a stable seated position. That is exactly what someone recovering from knee replacement needs: controlled movement that builds strength without jolting the joint. It’s built for steady, full-body recovery sessions, not sprint intervals, and the 8-level magnetic resistance keeps things whisper-quiet so you can exercise without feeling self-conscious.

At 55.1 inches long and 53.1 pounds, this bike needs a dedicated spot in your home, unlike the Cubii Move Under Desk Elliptical, which is compact enough to stash under a desk. If you have the floor space and want coordinated arm-and-leg motion for rehab, the Birdfeel delivers that full-body workout. For small spaces or lower-body-only exercise, the Cubii’s portability is a better fit.

Best for: Someone recovering from knee replacement who wants a stable, full-body workout from a comfortable seated position. Not ideal for tight spaces or those who need a machine they can easily move between rooms.

Product photos

#9Best For Early Recovery

MOVAO Mini In-Bed Leg Press

MOVAO Mini In-Bed Leg Press
Resistance6 elastic levels (11-66 lb)
Weight12.0 lb
Dimensions24.5 × 11.5 × 5.5 in
SurfaceFirm mattress, chair, floor, recliner
AssemblyFully assembled, no tools
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What We Like

  • Designed for early-stage recovery from day one
  • 6 progressive resistance levels for gradual strength building
  • Stabilizer straps prevent sliding on firm surfaces

Trade-offs

  • Feels too light for anyone leg pressing over 100 lb
  • Needs a firm surface or board under soft mattresses

The MOVAO Mini In-Bed Leg Press uses elastic resistance from 11 to 66 lb across six levels, which means you can start with almost no strain right after surgery and slowly rebuild leg strength without leaving your bed or chair. That gentle starting point is exactly what early knee replacement recovery demands, when even a few degrees of motion can feel monumental. The stabilizer straps and carabiners lock the unit onto a firm mattress, recliner, or floor, so you are not fighting against sliding while you press. At 12 lb and fully assembled in a carry case, it travels easily from bedroom to living room, making consistent daily rehab practical rather than a chore.

If you can already leg press over 100 lb at the gym, the MOVAO’s elastic resistance, roughly 11 to 66 lb of band tension across six levels, will feel light. It’s built for early-stage recovery, not heavy gym work. That focused design means it works from a bed, chair, or wheelchair, which is exactly what stroke, post-surgical, and deconditioned patients need when they’re rebuilding basic strength. The Cubii Move, by contrast, is an under-desk elliptical for longer seated cardio sessions, so the two serve very different purposes.

Best for: Someone in the first weeks after knee replacement who needs to rebuild leg strength from bed or a recliner with gentle, adjustable resistance. Not ideal for anyone already leg pressing over 100 lb or looking for a cardio-focused seated workout.
#10Best Motorized Rehab Option

Nobol PhysioPedal Premium Motorized Exerciser

Nobol PhysioPedal Premium Motorized Exerciser
Weight19.0 lb
Dimensions20.8 x 18.9 x 17.7 in
RotationForward and reverse
ResistanceAdjustable, plus motor assist
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What We Like

  • Motorized assistance for controlled rehab movement
  • Dual-mode arms and legs in one machine
  • Automatic stop technology for safety
  • Remote control keeps adjustments easy seated

Trade-offs

  • At 19 lb, not as portable as lighter under-desk bikes
  • No recumbent seat or back support built in

The motorized assistance lets you choose from eight speed settings, so you can start pedaling with controlled, low-impact movement even if you’re not ready to push on your own. The automatic stop technology adds a safety layer, and the 19-pound base keeps the machine stable during use. Switching between legs and arms takes seconds, which means you can work both upper and lower body without needing separate equipment.

At 19 pounds, this unit is heavier than the Cubii Move, so it’s not something you’ll casually toss in a car trunk. That heft comes from a substantial base designed for enhanced stability and consistent performance during exercise. You’ll need your own sturdy chair, and the 20.8-inch width means it occupies more floor space than a compact knee glider. For anyone who wants motorized assistance to control movement and build endurance from a seated position, this fills a role that basic pedal exercisers don’t cover.

Best for: Someone who needs motorized assistance to start pedaling and wants both arm and leg training in one machine. Not ideal for those who need a lightweight, ultra-portable option or a machine with a built-in seat.

Product photos

How We Evaluated Exercise Machines For Knee Replacement

Our evaluation focused on manufacturer specifications, expert round-up sources, and recurring patterns in owner feedback. We did not conduct physical testing; our conclusions come from documented features and what real users consistently report about comfort, durability, and safety.

Three criteria mattered most. First, impact level: every pick had to be low-impact or non-impact to protect the healing joint. Second, adjustability: resistance levels, seat height, and range-of-motion settings had to accommodate a user whose strength and flexibility change week by week. Third, safety features: motor overload protection, automatic stop technology, and non-slip bases ranked high because a fall or over-extension during early recovery can set progress back.

A research-led evaluation has limits. We cannot verify how a machine feels on the third week of daily use, and individual anatomy means one person’s perfect pedal stroke is another’s discomfort. We prioritized machines with the widest adjustability and clearest safety documentation to minimize those risks.

What To Look For In Exercise Machines For Knee Replacement

Choosing a machine after knee replacement means prioritizing safety, low impact, and adjustability over bells and whistles. The right machine grows with your recovery.

Look for seated or recumbent designs that keep weight off the joint, adjustable resistance to match improving strength, and safety features like motor overload protection or automatic stops. Compact machines suit home use; motorized options help when leg strength is very low.

Range Of Motion And Resistance

Early recovery demands gentle, controlled movement through a small arc. Machines like the OPTP Knee Glide and the MOVAO Mini In-Bed Leg Press let you start with a few degrees of flexion and extension. As strength returns, adjustable resistance, from 6 levels on the MOVAO to 12 levels on the Sunny recumbent bike, lets you progress without changing equipment.

Seated Vs. Recumbent Design

Seated machines (under-desk ellipticals and mini bikes) work well for the first weeks because they keep the hip and knee at a fixed angle. Recumbent bikes offer a more natural pedaling position with a backrest, which helps users who need trunk support or want to add arm movement. The Birdfeel Recumbent Exercise Bike pairs arm and leg motion, which can reduce the sense of effort in the recovering leg.

Safety And Stability Features

A machine that slips or stops unpredictably is dangerous for someone with limited balance. Look for non-slip suction cups (the MDODM Pedal Exerciser has them), motor overload protection (the Exerpeutic 2000M includes it), and automatic stop technology (the Nobol PhysioPedal has it). A wide base and low center of gravity matter more than portability during early recovery.

  • Check that the machine fits your strongest leg’s starting range of motion, not your goal range.
  • Confirm the seat or base is stable on your floor type, carpet, tile, or hardwood.
  • Look for a motorized option if you cannot complete a full pedal rotation under your own power.
  • Measure the machine’s footprint against your available floor space before buying.
  • Verify that resistance adjustments can be made from the seated position without standing.

The safest machine is the one you can use every day without pain or fear of falling.

Exercise Machines For Knee Replacement Compared

The table below compares all ten machines side by side, so you can see which features matter most for your recovery stage.

ProductDimensionsWeightResistance Type
Cubii Move Under Desk EllipticalL 19.7 x W 9.4 x H 21.7 in17.6 lbN/A
Sunny Health & Fitness Smart Mini Exercise BikeL 21.6 x W 18.7 x H 14.4 in20.5 lb8-Level Magnetic
OPTP Knee Glide by Bob and BradL 32.0 x W 5.0 x H 5.5 inN/AN/A
Sunny Health & Fitness Smart Magnetic Recumbent BikeL 66.9 x W 32.7 x H 50.6 in100.0 lb12-Level Magnetic
Exerpeutic 2000M Motorized Under Desk BikeL 21.0 x W 18.2 x H 14.5 inN/AMotorized
MDODM Pedal Exerciser Bike for SeniorsL 21.5 x W 15.7 x H 40.5 in15.6 lbAdjustable knob
AN Under Desk Bike Pedal ExerciserL 20.0 x W 9.0 x H 15.0 inN/AAdjustable turn-knob
Birdfeel Recumbent Exercise Bike with Arm ExerciserL 24.6 x W 55.1 x H 47.2 in53.1 lb8-level magnetic
MOVAO Mini In-Bed Leg PressL 24.5 x W 11.5 x H 5.5 in12.0 lb6 elastic levels
Nobol PhysioPedal Premium Motorized ExerciserL 20.8 x W 18.9 x H 17.7 in19.0 lbMotor assist

Frequently Asked Questions

What is the best exercise machine to use after knee replacement surgery?

The best machine depends on your recovery stage. For the first weeks, a seated glider like the OPTP Knee Glide or a motorized unit like the Exerpeutic 2000M helps restore range of motion. Once you can pedal comfortably, a recumbent bike with adjustable resistance supports gradual strength building without impact.

Can I use a stationary bike after knee replacement?

Yes. A recumbent stationary bike is often recommended because the seated position and low-impact pedaling are gentle on the joint. Look for models with step-through frames for easy mounting and multiple resistance levels to progress at your own pace. The Sunny Health & Fitness Smart Magnetic Recumbent Bike is a strong example.

When can I start using an under-desk elliptical after knee surgery?

Most surgeons clear patients for seated, low-impact movement once the incision heals and swelling subsides, typically within the first two weeks. Start with a few minutes at no resistance and stop if you feel sharp pain. The Cubii Move Under Desk Elliptical is designed for this kind of gentle, quiet motion.

Are motorized exercise machines safe for knee replacement rehab?

Yes, when they include safety features like overload protection and automatic stop. Motorized machines help users who lack the strength to complete a full pedal rotation, making them a good bridge between passive range-of-motion exercises and active pedaling. The Nobol PhysioPedal and Exerpeutic 2000M both include these protections.

How do I choose between a mini bike and a recumbent bike for recovery?

Choose a mini bike if you need a compact, portable option for seated use under a desk or beside a chair. Choose a recumbent bike if you want a stable, full-body workout with a backrest and wider resistance range. Mini bikes suit early recovery; recumbent bikes support the later strength-building phase.

The Bottom Line

The Cubii Move Under Desk Elliptical is our Best Overall pick for anyone who wants a quiet, compact machine that fits into daily life without drawing attention or taking up floor space. It works best for seated users who value discretion and low impact over progressive resistance or standing options.

If you are in the first weeks of rehab and need to rebuild range of motion, the OPTP Knee Glide by Bob and Brad targets exactly that movement. For those ready to add arm work and longer cardio sessions, the Sunny Health & Fitness Smart Magnetic Recumbent Bike provides stable, adjustable resistance in a step-through frame.

The single most important factor in choosing a machine after knee replacement is matching the machine’s range of motion and resistance to your current stage of recovery. Don’t pick based on where you hope to be in three months. Start gentle, stay consistent, and upgrade when the movement feels easy.