Whether you are managing a niggling knee, recovering from a trail sprain, or simply tired of feeling every footfall the morning after a long run, low-impact cardio options can keep your engine ticking over without grinding through connective tissue. ‘It’s a great way to get exercise in and stay active without putting a ton of stress on your joints, especially if you’re someone that has pre-existing medical conditions or injuries,’ says Megha Abraham, MD, assistant professor and sports medicine physician at UTHealth Houston.
Low impact does not mean low intensity. The distinction matters: whereas soft cardio asks you to back off the effort, low-impact cardio lets you go as hard as you want, provided the mechanics of the movement keep ground-reaction force in check. From the gym floor to the pool, here are five picks the experts actually recommend.
The Best Low-Impact Cardio Options for Joint Health
The incline treadmill is a starting point worth taking seriously. Running on a flat belt is not truly low impact, but tilt the deck and the equation shifts. ‘What I like about adding incline is that it changes the position of your ankle, hip, knee, and spine,’ says Milica McDowell, PT, MSPT, DPT, associate vice president of education at US Physical Therapy and author of WALK. ‘For anybody who has difficulty managing load on a flat surface, taking them to an incline is going to feel much more gentle.’ Alex Rothstein, EdD, MS, CSCS, exercise physiologist and assistant professor of exercise science at the New York Institute of Technology, adds that incline also reduces the downward force itself: ‘You’re not really jumping up and landing down on the treadmill. You’re kind of stepping up. There’s still some impact, but it’s not nearly as strong.’
The elliptical remains the default answer for a reason. It came to market specifically as a lower-impact alternative to the treadmill, says Dr McDowell, and because your feet never leave the pads, impact is a fraction of what running produces. The arm handles add a second advantage: ‘By incorporating the upper extremities, you’re also going to burn more calories,’ Dr McDowell says. Rothstein advises choosing a machine that allows your natural stride rather than one that locks your legs into a fixed gait, to keep hips, knees, and ankles moving in their own pattern.
Swimming sits at the furthest end of the impact spectrum. ‘For anyone that’s dealing with an injury or really bad arthritis or anything like that, I always recommend swimming, water aerobics, and things like that,’ says Dr Abraham. The trade-off is that water handles the deceleration of your limbs for you, which means virtually no eccentric muscle contraction. ‘Swimming is very good for the body as a cardiovascular application, and for moving the joints through various ranges of motion, but it doesn’t really train the muscle and nervous system for the real world,’ Rothstein says. For hill walkers or bikers who need their legs to work reliably on a descent, that gap is worth keeping in mind.
Spin Bikes and Air Bikes: Higher Intensity, Still Low Impact
A spin bike’s circular pedalling motion removes repetitive impact entirely. ‘It’s very joint friendly, and you can control the intensity, so you can still have your HIIT workouts and things like that,’ says Dr Abraham. Clipping in with spin shoes improves the cadence further, letting you pull up through the stroke rather than simply pushing down.
Finally, the air bike. Known variously as the Assault Bike, Echo Bike, or Airdyne, it is not most people’s first choice for a steady session, but Dr McDowell makes the case for it: ‘When you think about the bike, you’re taking off some of your body weight, because you’re seated. And with the air bike you’re upgrading the cardio demand and challenging your upper body because of the handlebars.’ Its resistance scales directly with your effort, which means the intensity is always in your hands. As Dr McDowell puts it, the air bike ‘is an unpopular opinion, because everybody hates it,’ but that reputation belongs to people who have pushed it to its limit. You do not have to.
The common thread across all five is that managing impact does not require managing down the effort. Pick the machine that suits your injury history, clip in, and go.
