Fitness challenge with friends: how to set one up so everyone is still training at the end
A fitness challenge with friends works best when it rewards turning up regularly rather than training the most, lasts long enough to build a habit, and has rules that forgive a bad week. The research supports the idea. In the STEP UP randomised trial, 602 adults tracking their steps walked more each day when placed in a game with other participants, and the competitive version had the largest effect, the only one still significantly above the control group three months after the game ended. A meta-analysis of goal setting found that goals worked particularly well when set as a group and in public. But a badly designed challenge can do harm: if the winner is whoever trains the most, the fittest person wins every time, beginners give up, and someone overreaches. This article explains what to measure, how long to run it, how to score it fairly, and how to keep the challenge going once it ends.
Your consistency score in a crew
Enter the crew's weekly rhythm, the weeks gone by and the sessions you have done: the calculation gives your consistency, the way the Never Skip Club ranking counts it.
- Your consistency
- 92 %
- Sessions required so far
- 12 sessions
- Sessions missing for 100 %
- 1 sessions
Sessions above the weekly rhythm do not count extra: consistency, not volume, decides the ranking.
What the research says about competing with friends
The best evidence comes from the STEP UP trial, led by Mitesh Patel. Adults with overweight or obesity from across the United States wore step trackers, chose a step goal, and were randomly assigned either to a control group, which only got feedback from the device, or to one of three 24-week games built with points and levels: support, collaboration or competition between participants.
All three games increased daily steps compared with control during the intervention. Competition produced the largest increase, around 920 extra steps a day on average. During the 12-week follow-up, when the games had stopped, activity fell in every arm, and only the competition group remained significantly above control.
Two other findings help with design. A meta-analysis by Epton and colleagues, covering 141 papers, found that goal setting was particularly effective when the goal was difficult, set publicly and set as a group goal. And Harkin and colleagues, pooling 138 randomised studies, found that monitoring progress helped people reach their goals, more so when the results were reported to others or made public. A challenge with friends combines all three.
Measure turning up, not volume
The classic mistake is to score the total: most kilometres, most minutes, most calories. That rewards the person who already trains the most and has the most free time, and it encourages everyone to do too much too soon.
A fairer measure is regularity: the share of agreed sessions each person actually completed. If the crew agrees four sessions a week and you do four, you score 100%, whether you are a marathon runner or a beginner. Doing six earns nothing extra.
This is not just fairer, it is closer to what builds a habit. A study of new gym members by Kaushal and Rhodes found that consistency was the strongest of the factors that predicted how quickly an exercise habit formed, and that four sessions a week for six weeks was the minimum that established it.
Set rules that work for everyone
Agree the rules before the start, write them down and keep them simple.
- The rhythm. How many sessions per week. Three or four suits most adults and meets the World Health Organization minimum of 150 minutes of moderate activity if each session lasts 30 to 40 minutes.
- What counts as a session. A minimum duration, for example 30 minutes, and any type of training. A minimum stops "two-minute sessions" without pushing anyone to extremes.
- The duration. One week to try it, one month to feel a difference, three months to build a habit. In the study led by Lally, the time to reach a plateau of automaticity ranged from 18 to 254 days, so longer challenges do more lasting good.
- The group. Three to seven people is a workable size: enough that the ranking means something, small enough that everyone knows each other.
- The stake. Keep it light: the last-placed person chooses the next restaurant, or picks the next challenge. Large stakes make people hide missed sessions.
Avoid the classic traps
- Overtraining. A challenge can push people to train through pain or fatigue. Rules that do not reward extra sessions remove most of this pressure. If someone is ill or injured, they rest.
- The all-or-nothing streak. Challenges that reset to zero after one missed day make people quit after the first lapse. In Lally's study, missing one opportunity did not materially affect habit formation. Score the percentage, not an unbroken run. More on this in our article on the missed workout.
- Leaving beginners behind. If the plan is the same for everyone, choose a level that the least trained person can sustain. Each person can then adjust intensity within their own sessions.
- The cliff at the end. In STEP UP, activity dropped once the game stopped. Plan the next round before the current one ends.
Keep going after the challenge
The end of a challenge is a risky moment. Three ways to soften it:
- Start a new round straight away, perhaps with a slightly different rhythm or a new member.
- Keep the slots. The sessions you protected for the challenge become your normal week.
- Turn the challenge into personal goals. Our article on fitness goals explains how to set ones you can track.
If you are setting up a challenge mainly to train with one or two people, the workout buddy article covers how to choose partners and plan a shared week. For the sessions themselves, the hotel room workout is a complete routine that fits anywhere, which helps when someone is travelling.
If anyone in the group has a heart condition, high blood pressure, diabetes, a recent injury or is pregnant, they should check with a doctor before starting and set their own intensity. Chest pain, dizziness or unusual breathlessness mean stopping and seeking medical advice.
Read your score honestly
The calculator below uses the same logic as the Never Skip Club ranking: sessions done divided by sessions required since the start of the challenge, with extra sessions above the weekly rhythm not counted. Use it before the challenge to see where you are starting from, and halfway through to check whether your rhythm is realistic. If you are below 50%, the rhythm is probably too ambitious for your current weeks.
Launch your challenge on Never Skip Club
Never Skip Club was built for exactly this kind of challenge. Create a crew of 3 to 7 friends, choose a rhythm, for example four sessions a week, and a duration of one week, one month or three months. A session counts when it lasts 30 minutes or more, and the ranking is based on regularity, sessions done divided by sessions planned: training more than agreed earns no points, so the fittest person has no built-in advantage. Everyone can launch a guided session in about a minute, at the gym, at home or in a hotel room, and share the crew story on Instagram or WhatsApp.
Create your free account, set up your crew and send the link to your group chat tonight. If someone in the crew wants expert guidance, they can find a coach from our network, and existing members can sign in to start a new round.
Questions
How long should a fitness challenge with friends last?
Long enough to build a habit, short enough to stay exciting. One week is a good trial run, one month lets people feel a difference, and three months matches what habit research suggests, where reaching automaticity took from 18 to 254 days. Many groups start with a month, then immediately run a second round so the routine continues when the first one ends.
How do you make a fitness challenge fair for different fitness levels?
Score regularity rather than volume. If everyone agrees the same number of sessions per week and the ranking counts the share each person completes, a beginner who keeps all four sessions ranks level with a seasoned athlete who does the same. Let each person choose their own intensity within those sessions, and give no extra points for training more than agreed.
Does competition between friends actually increase activity?
In one large trial, yes. In STEP UP, 602 adults tracking their steps walked more when placed in a game with support, collaboration or competition, and competition gave the biggest increase, around 920 extra daily steps on average. It was also the only version still above the control group after the game stopped. Friendly competition works best with rules that do not reward overdoing it.
What should happen when someone misses a day in the challenge?
Nothing dramatic. Count the share of sessions completed over the whole challenge rather than an unbroken streak, so one missed day lowers the score slightly but never resets it. Habit research found that a single missed opportunity did not materially affect habit formation. A rule that resets to zero mostly teaches people to give up after their first bad week.
Sources
- Patel et al.: gamification interventions with social incentives for increasing physical activity, the STEP UP randomized clinical trial (JAMA Intern Med, 2019)
- Epton, Currie and Armitage: unique effects of setting goals on behavior change, systematic review and meta-analysis (J Consult Clin Psychol, 2017)
- Harkin et al.: does monitoring goal progress promote goal attainment? A meta-analysis of the experimental evidence (Psychol Bull, 2016)
- Kaushal and Rhodes: exercise habit formation in new gym members, a longitudinal study (J Behav Med, 2015)
- Lally et al.: how are habits formed, modelling habit formation in the real world (Eur J Soc Psychol, 2010)
- Gardner, Lally and Wardle: making health habitual, the psychology of habit formation (Br J Gen Pract, 2012)
- World Health Organization: physical activity, key facts
- Bull et al.: World Health Organization 2020 guidelines on physical activity and sedentary behaviour (Br J Sports Med, 2020)