Flat, level walking is excellent exercise. But add an incline, whether a real hill outdoors or a treadmill setting, and you unlock a noticeably different, more intense workout without adding any impact. Incline walking is one of the most underused tools for getting more out of the walk you're already doing.
Here's exactly what walking uphill does for your body, how to use incline effectively, and how to do it safely.
The calorie burn jump
This is the headline benefit, and the numbers are genuinely striking. Adding incline to your walk dramatically increases the effort required, and therefore the calories burned, without requiring you to walk any faster.
| Incline | Calories (30 min, 75 kg, 5 km/h) | vs flat ground |
|---|---|---|
| 0% (flat) | ~150 | Baseline |
| 3% | ~185 | +23% |
| 5% | ~210 | +40% |
| 8% | ~250 | +67% |
| 10% | ~280 | +87% |
| 15% | ~330 | +120% |
At a 10 percent incline, you're burning nearly double the calories of flat walking at the exact same pace. This puts incline walking's calorie burn in the same range as jogging, but without the joint-jarring impact that comes with running. For the full picture on how walking calories add up, see our calorie calculator guide.
Muscles that flat walking barely touches
Walking on level ground primarily works your calves and, to a lesser degree, your glutes and hamstrings. Adding incline shifts the muscular demand considerably, particularly toward your glutes and hamstrings, which have to work much harder to drive you up the slope with each step.
This is one of walking's biggest limitations when done exclusively on flat ground, and incline is one of the simplest ways to address it. Regular incline walking noticeably builds glute and hamstring strength over weeks, something flat walking alone does far more slowly. If you're looking for other ways to add resistance and muscle engagement to your walks, our guides on rucking and Nordic walking cover complementary approaches.
A genuine cardio boost
Because incline walking requires substantially more effort at the same speed, your heart rate climbs into a higher training zone than flat walking would produce. This means you get a more effective cardiovascular workout in the same amount of time, useful if your schedule is tight and you want more benefit per minute walked.
Multiple short incline intervals within a walk (alternating a few minutes at a steep incline with a few minutes flat) create a natural interval training effect, similar in principle to the interval structure covered in our power walking guide, just using incline instead of speed as the intensity lever.
Lower impact than running, similar intensity
This is the real magic of incline walking. Running at a pace that matches the cardiovascular demand of a steep incline walk puts roughly 2.5 to 3 times your body weight through your knees with every stride. Walking, even uphill, keeps that impact closer to 1 to 1.5 times body weight, since one foot remains in contact with the ground at all times.
This makes incline walking one of the best options for people who want running-level intensity without running-level joint stress, whether because of existing joint concerns, injury recovery, or simply wanting to protect long-term joint health while still training hard.
Better posture and core engagement
Walking uphill naturally encourages a slight forward lean from the ankles and more deliberate engagement of your core and glutes to maintain balance and drive momentum up the slope. Done with attention to proper walking form, incline walking can actually reinforce better overall walking posture more than flat walking does, since poor form becomes uncomfortable much faster on an incline.
Outdoor hills vs treadmill incline
Both work well, with some practical differences worth knowing.
Outdoor hills add natural variety, changing gradient, and the mental health benefits of being outside that we cover in our mental health guide. The downside is that hill availability depends entirely on your location, and steep or long descents put more strain on your knees than the ascent itself.
Treadmill incline gives you precise control over gradient, lets you keep the incline constant for a set duration, and, importantly, brings you back down at 0 percent incline instead of a steep descent, avoiding the knee strain that comes with walking down real hills. This makes a treadmill genuinely useful specifically for people who want the uphill benefit without any downhill impact. See our full treadmill vs outdoor comparison for more.
Recommended treadmill incline settings
| Goal | Incline | Pace | Notes |
|---|---|---|---|
| Simulate outdoor walking | 1-2% | Normal | Treadmill belts assist your stride slightly; this compensates |
| General fitness boost | 4-6% | Moderate | Noticeably harder, sustainable for 20-30 min |
| High intensity, low impact | 8-10% | Moderate-slow | Near-jogging effort, zero impact |
| Steep hike simulation | 12-15% | Slow | Very demanding, shorter durations (10-15 min) |
A popular structured incline workout that's gained attention online is the "12-3-30": 12 percent incline, 3 mph (4.8 km/h), for 30 minutes. It's genuinely effective, burning roughly 300 to 400 calories, but intense for beginners. A gentler starting version is 5 percent incline at 4 km/h for 30 minutes, which still delivers a meaningful boost over flat walking while being sustainable for most fitness levels.
How to start incorporating incline
If you're new to incline walking, ease in rather than jumping straight to steep grades:
- Week 1-2: Add 2 to 3 percent incline to your normal walks, or find a gentle slope outdoors, for the full duration.
- Week 3-4: Increase to 4 to 6 percent, or add a few short bursts of steeper incline (8-10%) within an otherwise flat walk.
- Week 5 onward: Build toward sustained sessions at 6 to 10 percent, or add dedicated hill routes to your weekly routine, alongside your regular flat walking days.
You don't need to do every walk on an incline. Even one or two dedicated incline sessions per week, added to your normal flat walking routine, meaningfully boosts your overall fitness and calorie burn without overhauling your entire routine.
Safety considerations
Watch your knees on descents. If walking real outdoor hills, the downhill portion puts more stress on your knees than the uphill climb. Slow down on the way down, take shorter steps, and consider trekking poles for steep descents if you have any knee sensitivity.
Don't hold the handrails on a treadmill incline. Gripping the rails reduces the effort your body actually does, undermining much of the calorie and muscle benefit. If you need support for balance at a steep incline, reduce the incline rather than relying on the rails.
Wear supportive shoes. Incline walking changes the pressure distribution across your foot, and good walking shoes with solid heel and arch support matter even more than on flat ground.
Build up gradually. Jumping straight to steep inclines for long durations can strain your calves and Achilles tendon, which work considerably harder on an incline. Progress over weeks, not days.
Track your incline walks too
StepMax tracks your steps and distance regardless of terrain, so your hill walks and incline treadmill sessions all count toward your daily goal.
Download on Google Play Download on App StoreThe bottom line
Adding incline to your walks, whether real hills or a treadmill setting, is one of the simplest ways to significantly increase calorie burn, build glute and hamstring strength, and get a more intense cardiovascular workout, all while keeping the low joint impact that makes walking so sustainable. Start with a gentle incline, build up over a few weeks, and you'll get noticeably more out of the same time spent walking.