# Momentum > Momentum shows when your steps happen across the day, hour by hour, and picks out your longest stretch sitting down. Two days with the same step count can look very different. Research suggests breaking up long sitting spells helps: in one trial, five minutes of walking every 30 minutes cut blood sugar spikes after meals by more than half. - URL: https://www.getstepup.app/metrics/momentum - Author: Dheeraj Kumar Sharma, founder of StepUp - Published: 2026-10-16 - Updated: 2026-10-16 Your step count tells you how much you walked. It doesn't tell you *when*. A day with one long walk in the morning and nine hours at a desk can add up to the same number as a day with movement spread from breakfast to bedtime. Momentum shows the difference. ## What does Momentum measure? Momentum lays out your steps across the day, hour by hour, so you can see when you move and when you don't. It also picks out your **longest stretch sitting down**: the longest gap in your waking day with almost no steps. That one number is often the most useful thing on the screen. It points straight at the part of your day where a few minutes on your feet would make the biggest difference. ## Where does the data come from? Momentum uses the step counts your iPhone and Apple Watch save to Apple Health throughout the day. It doesn't need an Apple Watch: carrying your phone is enough, although a watch fills in the steps you take while your phone is on a desk or charging. ## Why does breaking up sitting matter? For years, advice about activity focused on the total: minutes a week, steps a day. Research since has looked at how that time is spread out, and it points the same way. - **Healy et al., 2008.** Australian adults wore activity monitors for a week. Those who broke up their sitting time more often had smaller waists and healthier blood fats and blood sugar, even when their total sitting time was the same. - **Duran et al., 2023.** In a lab trial, adults sat for eight hours on several different days, trying a different pattern of walking breaks each time. Five minutes of easy walking every 30 minutes cut blood sugar spikes after large meals by 58% compared with sitting all day, and every walking pattern lowered blood pressure. The trial was small, with 11 people, and the first study shows an association rather than proof. But both suggest the same practical rule: long, unbroken spells of sitting are worth breaking up, even if you also exercise. ## What's a good Momentum? There's no single target. A good day is one with **steps spread across most hours** and **no very long stretch sitting down**. If your longest sitting stretch is three or four hours, bringing it under an hour or two is a realistic first goal. Don't compare yourself with someone else's day. A nurse on a 12-hour shift and someone working from home will never have the same shape. Compare this week with your last few. ## How can you improve your Momentum? - **Set a cue, not a timer.** Stand up at the end of every call, after every email you send, or each time you refill your water. - **Walk during calls.** A 20-minute phone call is 2,000 steps on foot. - **Use the stairs or the far toilet.** Small detours add movement without adding a walk. - **Start where your longest stretch is.** If it's every afternoon at your desk, that's where your first break belongs. - **Two to five minutes is enough.** The breaks in the 2023 trial were short, easy walks, not workouts. ## Momentum in StepUp Momentum is free in StepUp. It shows your steps for the day by hour and highlights your longest stretch sitting down, with a short note explaining what it means. Like every StepUp metric, it's worked out on your iPhone from Apple Health, and your data never leaves your phone. It pairs well with [How many steps should I walk a day?](https://www.getstepup.app/guides/how-many-steps-a-day): the total tells you how much, Momentum tells you how evenly. ## The short version - Momentum shows when your steps happen, hour by hour, and your longest stretch sitting down. - Two days with the same step count can be very different for your body. - Breaking up long sitting spells is linked to healthier blood sugar, blood fats and blood pressure. - Two to five minutes on your feet every half hour or so is enough to start. - Momentum is free and needs only your iPhone. ## Questions ### How long is too long to sit? There is no official limit, but research suggests breaking up sitting every 30 to 60 minutes. In one lab trial, five minutes of walking every 30 minutes lowered blood sugar spikes and blood pressure compared with sitting all day. ### Does exercise cancel out sitting all day? Not completely. Exercise has its own benefits, but studies find that how you break up the rest of your day also matters. Someone who exercises in the morning and then sits for nine hours still benefits from short walking breaks. ### Does Momentum need an Apple Watch? No. Momentum uses the step counts your iPhone saves to Apple Health. An Apple Watch helps fill in steps you take while your phone is on a desk, but it isn't required. ### Is Momentum free in StepUp? Yes. Momentum is one of StepUp's free features, alongside steps, distance, calories and flights climbed. The other eight walking metrics are part of StepUp Pro. ## Sources - [Healy et al. (2008), Breaks in sedentary time: beneficial associations with metabolic risk, Diabetes Care](https://doi.org/10.2337/dc07-2046) - [Duran et al. (2023), Breaking up prolonged sitting to improve cardiometabolic risk: dose–response analysis of a randomized crossover trial, Medicine & Science in Sports & Exercise](https://doi.org/10.1249/MSS.0000000000003109)