A two-month randomized controlled trial at Zhejiang Chinese Medical University put jump rope head-to-head against jogging in 92 college students. The jogging group got more explosive — their jump distance went up. The rope skipping group got less explosive — theirs went down. The researchers' own explanation has nothing to do with the rope. It has to do with nobody checking if the reps were hard enough to count.
What the Study Actually Tested
Researchers split 92 undergraduates — mostly medicine majors, about 70% women — into three groups for two months: jogging, rope skipping, and a no-change control. Both exercise groups trained at least four times a week, minimum 40 to 50 minutes a session. The jogging group ran continuous moderate-intensity sessions. The rope skipping group trained on their own, tracked through a fitness app called Keep — the same kind of self-logging tool most people use to "stay accountable" without anyone actually checking their work.
The Number That Should Worry Every Jump Rope Brand
Standing long jump distance — a standard test of explosive lower-body power — improved significantly in the jogging group, rising from 72.00 to 76.45 points over the two months. The rope skipping group's score went the other way. The gap between the two groups was statistically real, not noise. Systolic blood pressure told a similar story: it dropped meaningfully in the joggers, from about 125 to 121 mmHg, with no comparable change in the rope skippers. Endurance run times got worse for both the rope skipping group and the control group — only the joggers held steady.
Why the Rope Group Backfired, In the Researchers' Own Words
Here's the part that matters. The study's authors didn't conclude that jump rope doesn't work. They pointed at two specific failures in how it was delivered: the app-based supervision "failing to prevent all compliance issues," and — in their own words — "low rope-skipping intensity" as the likely reason the group got worse instead of better. Translation: the students were moving, but not working hard enough for it to count as training, and nothing in their setup caught that.
The researchers' own explanation wasn't the rope. It was that an app tracking whether you showed up isn't the same as a program making sure you actually worked.
Tracking Isn't the Same as Training
This is the gap that keeps showing up across jump rope research: the rope is not a magic tool that produces results by itself. Every study on this blog that found a real effect — faster sprint times, better balance, stronger cores — came from a defined, structured protocol: specific intervals, specific intensity, specific duration, checked against a plan. Every time the intervention was just "go skip rope for 40 minutes" with nobody verifying the effort, the results got shaky. A phone app that logs a session length isn't checking whether you were actually working. It's just counting minutes.
What This Actually Means If You Train With a Rope
If you already own a rope, this study is not a reason to switch to running. It's a reason to take intensity seriously. Jump rope at a lazy pace for 40 minutes is not the same stimulus as 40 minutes of real interval work, and a passive tracking app can't tell the difference between the two — it just logs that you moved. The variable that actually separates a result from a wasted 40 minutes isn't the equipment. It's whether something is holding you to a real pace.
We publish this one because it's an uncomfortable result for a company that sells ropes, and burying it would make us exactly the kind of brand we built this against. The data is the data. The fix isn't a better rope. It's a program that won't let you fake the workout.
Source: Frontiers in Public Health (2025), "Differential impacts of jogging and rope skipping in college students in China based on physical test score: a randomized controlled trial."
If a study can show rope skipping backfires just from bad supervision, the fix isn't switching to running — it's supervision that actually works. The Performance Rope comes with the Rep Theory Training App built in: a personalized program, a workout timer that tells you when to push and when to rest, and progress tracking that actually holds you to it — not just a log of minutes moved. Get the rope for $20 today, and the full Training App comes with it for $9.99/month after. A short minimum term applies — full details are on the product page.