Row & Recover

Comfort & fit

Best Rowing Machines for Bad Knees

This is an equipment-fit page, not a medical one. Seat height, rail length and how smoothly the machine loads are what decide it - and a few makers actually publish them.

By Stephen V.An enthusiast who reads the manuals and does the math. Not a coach, not a lab.Last verified July 24, 2026.

We earn a commission if you buy through the links on this page, at no cost to you. It has no effect on what we recommend or the order we recommend it in — we say “skip this one” on machines that pay us the same as the ones we like. How we’re funded.

A note before the picks: this is a page about choosing equipment, not a substitute for advice from a physiotherapist or doctor. We have not tested these machines on anyone, we hold no clinical credential, and nothing here is treatment or rehabilitation guidance. If your knees are a medical question, ask a professional before you buy a machine to use them on. What follows is about fit — which published numbers make a rower easier to get on, off and use comfortably.

Rowing is already one of the gentler things you can do for cardio, because the seat carries your weight and there is no impact — no landing, no pounding, nothing that jars a joint. That is the whole reason people with cranky knees look at a rower in the first place. But three published details still separate the comfortable machines from the awkward ones, and most makers leave all three off the listing.

They are seat height (how far you drop down to sit and push up to stand), rail length (whether your legs reach full extension without the machine forcing your knees into a deep bend at the catch), and resistance smoothness (magnetic and water load gradually; hydraulic and hard air catches jolt). The machines below are the ones that publish enough to judge the fit.

The short answer

Quick picks

Ranked on published specification, buyer fit and what each machine costs to keep over five years. Select a row to jump to the full write-up. We have not rowed on these machines — here is exactly what we do instead.

#MachineBest forPrice
1
Concept2 RowErg with Tall Legs

Concept2 RowErg with Tall Legs

The same machine with the seat 6 inches higher. That one change is the difference between a rower you can get off unaided and one you cannot.

Best for getting on and off
2
Sunny Health & Fitness Obsidian Surge

Sunny Health & Fitness Obsidian Surge

Water resistance and a 17-inch seat at roughly a quarter of a WaterRower's price, in steel rather than ash.

Best budget higher seat
3
Sunny Health & Fitness Smart Dual-Rail Rower

Sunny Health & Fitness Smart Dual-Rail Rower

A 50-inch rail, 16 magnetic levels and a published 300 lb capacity, with covered dual rails that keep the running noise down.

Best smooth magnetic
4
WaterRower Club

WaterRower Club

The commercial-spec WaterRower — a taller seat, a heavier frame and the Bluetooth S4, for people who found the Natural a touch low.

Best higher-seat water rower
5
MERACH Q1S

MERACH Q1S

The budget rower that publishes the numbers the others hide: 350 lb capacity, users to 6 ft 7 in, 65 inches long, 58.9 lb — all stated on the listing.

Best budget overall

In detail

Every pick, and what is wrong with it

Each machine below gets the same four things: what it does well, what it does not, the five-year cost of owning it, and the case for buying something else instead.

Concept2 RowErg with Tall Legs rowing machine

1. Best for getting on and off

Concept2 RowErg with Tall Legs

The same machine with the seat 6 inches higher. That one change is the difference between a rower you can get off unaided and one you cannot.

Floor space: about 9.0 ft by 4.0 ft once you allow for handle travel and elbow room — roughly 36 sq ft.

What is good

  • 20-inch seat height instead of 14 — close to a dining chair, so you stand up rather than push up off the floor
  • Identical 500 lb capacity, PM5 monitor and no-subscription position as the standard RowErg
  • Easier transfer on and off makes it the sensible pick for older rowers and anyone rehabbing

What is not

  • Concept2 publishes 68 lb with tall legs against 57 lb standard — 11 lb more to move
  • Stored footprint grows to 27 x 47 x 54 in
  • Costs meaningfully more than the standard-leg model for one dimensional change

Skip this one if: Skip it if you have no trouble getting off a low seat — you are paying extra for height you do not need.

Sunny Health & Fitness Obsidian Surge rowing machine

2. Best budget higher seat

Sunny Health & Fitness Obsidian Surge

Water resistance and a 17-inch seat at roughly a quarter of a WaterRower's price, in steel rather than ash.

Floor space: about 7.7 ft by 3.8 ft once you allow for handle travel and elbow room — roughly 29 sq ft.

What is good

  • 17-inch seat height is unusually high for a budget machine — an easy step on and off
  • 16 hydro blades give the water sound and progressive resistance people buy water rowers for
  • Stores upright, and the SunnyFit app carries no membership fee

What is not

  • Steel frame rather than wood; the aesthetic that sells WaterRowers is not the point here
  • Sunny does not publish a user weight limit for this model
  • 34 inches tall in use, so it does not slide under anything

Skip this one if: Skip it if the wooden-rower look is half the reason you want one — no steel machine delivers that.

Sunny Health & Fitness Smart Dual-Rail Rower rowing machine

3. Best smooth magnetic

Sunny Health & Fitness Smart Dual-Rail Rower

A 50-inch rail, 16 magnetic levels and a published 300 lb capacity, with covered dual rails that keep the running noise down.

Floor space: about 7.6 ft by 3.6 ft once you allow for handle travel and elbow room — roughly 28 sq ft.

What is good

  • 50-inch rail — long enough for a full leg drive on most adults
  • Dual rails with protective coverings; the covers are doing acoustic work, not just cosmetic
  • 300 lb capacity published, and the SunnyFit app is free

What is not

  • 36.4 inches tall in use
  • 68 lb
  • 300 lb ceiling is lower than the MERACH Q1S at a higher price

Skip this one if: Skip it if you need more than 300 lb of capacity — the rail is excellent but the frame rating is the binding constraint.

WaterRower Club rowing machine

4. Best higher-seat water rower

WaterRower Club

The commercial-spec WaterRower — a taller seat, a heavier frame and the Bluetooth S4, for people who found the Natural a touch low.

Floor space: about 7.9 ft by 4.0 ft once you allow for handle travel and elbow room — roughly 32 sq ft.

What is good

  • Higher seat than the Natural, which makes getting on and off noticeably easier
  • S4 BLE monitor pairs with phone apps out of the box
  • Built for club use, so the frame is specified for far more hours than a home machine needs

What is not

  • 117 lb before you add water
  • No published user weight limit on this listing
  • Costs more than the Natural for a specification most home rowers will never exhaust

Skip this one if: Skip it if the Natural fits you — the Club's extra durability is aimed at a gym's usage, not a spare bedroom's.

MERACH Q1S rowing machine

5. Best budget overall

MERACH Q1S

The budget rower that publishes the numbers the others hide: 350 lb capacity, users to 6 ft 7 in, 65 inches long, 58.9 lb — all stated on the listing.

Floor space: about 6.4 ft by 3.6 ft once you allow for handle travel and elbow room — roughly 23 sq ft.

What is good

  • 350 lb capacity and 6 ft 7 in maximum user height, both published — unusual candour at this price
  • Dual slide rail is more stable than the single rail most budget machines use
  • 16 magnetic levels and no subscription of any kind

What is not

  • 65 inches of rail is short if you are near the 6 ft 7 in ceiling — the limit and the comfortable limit are different numbers
  • Magnetic resistance does not build with stroke rate the way air does; hard efforts feel capped
  • 1-year manufacturer warranty

Skip this one if: Skip it if you plan to train intervals seriously — magnetic resistance at this price runs out of top end.

How to choose

What actually decides this

Seat height is the first thing to check

The single most useful number for a stiff knee is how high the seat sits off the floor, because getting up from a low seat is a deep knee-loaded push that a sore joint feels most. Most machines put the seat around 14 inches — the standard Concept2 is exactly that. The Concept2 RowErg with tall legs raises it to 20 inches, close to a dining chair, so you stand up rather than push off the floor. That one change is why it leads this page: everything else about it is the reference-standard RowErg — 500 lb capacity, no subscription, the PM5 monitor — with the seat where a stiff body wants it.

On a budget, the Sunny Obsidian Surge publishes a 17-inch seat, unusually high for a cheap machine and an easy step on and off, on a water rower that costs a fraction of the wooden ones. The WaterRower Club sits higher than the Natural too, which is most of the reason to choose it. Where a maker does not publish a seat height, our tables say “Not published” rather than guessing — and you should treat the silence as a reason to measure in a showroom if you can.

Rail length, so the catch is not a deep squat

At the front of the stroke your knees bend up toward your chest. On a rail that is too short for your legs, you either run out of track or fold your knees deeper than they want to go to fit the stroke in. A longer rail lets you keep the catch shallow. The Sunny Dual-Rail publishes a 50-inch rail and the MERACH Q1S fits users to a stated 6 ft 7 in — both give most people room to keep the catch comfortable rather than cramped. The tall-users roundup ranks machines on exactly this if your height is the binding constraint.

Smooth resistance, not a jolt

Magnetic and water resistance both load gradually — the harder you pull, the more they give back, with nothing sudden at the catch. That is kinder to a joint than a hydraulic cylinder’s abrupt bite or an air rower driven at a hard, snatchy catch. The Sunny Dual-Rail is the quiet, smooth magnetic pick here; the two water rowers give the same gradual loading with a low-frequency sound most people find pleasant. None of this is a medical claim — it is simply how the mechanisms behave.

What decides it

If the budget allows, the Concept2 tall-legs model is the most comfortable machine here to get on and off, and the best machine here full stop. On a budget, the Sunny Obsidian Surge buys you a high seat and smooth water resistance cheaply, and the MERACH Q1S buys you a rated frame and a long enough fit. Whichever you choose, set it up so the catch stays shallow and stop if anything hurts — and if pain is the reason you are shopping, talk to a professional first. This page can help you pick a machine; it cannot tell you whether to be on one.

General information about choosing equipment, not medical advice. Row & Recover has no clinical credential and has not assessed anyone’s knees.

Straight answers

Questions people actually ask

Is a rowing machine good for bad knees?

Rowing is low-impact - the seat carries your weight and there is no landing or pounding to jar a joint - which is why many people with sensitive knees consider it. Whether it is right for your knees specifically is a medical question for a physiotherapist or doctor, not something a buying guide can answer. This page can only help you choose a machine that is comfortable to get on, off and use.

What seat height is best for a rowing machine if you have knee problems?

A higher seat is easier to stand up from, which is the movement a stiff knee feels most. Most rowers sit around 14 inches; the Concept2 RowErg with tall legs raises it to 20 inches, close to a dining chair, and the Sunny Obsidian Surge publishes 17 inches on a budget. Where a maker does not publish the figure, treat that as a reason to measure one in person.

Is magnetic or water resistance better for sensitive joints?

Both load gradually rather than with a sudden bite, which is generally kinder to a joint than a hydraulic cylinder or a hard, snatchy air catch. That is a description of how the mechanisms behave, not a medical recommendation. A smooth magnetic machine like the Sunny Dual-Rail or a water rower gives that gradual loading.

Does rail length matter for knee comfort?

Yes. At the catch your knees bend up toward your chest, and a rail that is too short for your legs forces a deeper bend to fit the stroke in. A longer rail - the Sunny Dual-Rail publishes 50 inches - lets you keep the catch shallow. Measure your inseam and match it to the published rail length or fit range rather than guessing from overall height.

The honest part

What we did not do

We have not rowed on these machines. We do not own them, there is no test lab here, and nobody writing this holds a coaching certification. Every ranking on this page is an argument from published specification and buyer fit, not from a stopwatch.

What we did do is read each manufacturer’s own published figures, record the ones they decline to publish, compute the floor space and the five-year cost, and date all of it. The full method is here so you can check our working or disagree with it.

Show your working

Sources

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