Most challenges are designed forwards, from the launch date. You promote it for a fortnight, forty people sign up, half of them stop logging by week three, and at the end you have a list of email addresses and two new clients. The mechanism is fine. What went wrong is that nobody decided, before the first post went out, what the challenge was supposed to turn into.
A challenge is an acquisition mechanism. Design it backwards from the conversion and almost every other decision — length, entry price, daily actions, what you measure — answers itself.
Work backwards from the offer
Write the offer before you write the promotion. One sentence: at the end of this, finishers can move onto my ongoing coaching at this price, starting on this date.
That sentence constrains everything upstream. If the offer is twelve weeks of individual programming and weekly check-ins, the challenge has to give people a real sample of being coached by you — your programming, your feedback, your voice — not a PDF and a hashtag. Someone who spent six weeks following a generic plan in a Facebook group has no evidence that paying you monthly would be different.
It also tells you who you are recruiting. A challenge open to anyone fills with people who are not going to buy coaching from anyone. A challenge aimed at the same person your coaching is aimed at fills more slowly and converts several times better.
A challenge is one way to fill a pipeline and it is the costliest of them in your own time. Before you commit six weeks, it is worth knowing where it sits against the other ways to generate leads, some of which run without you.
Free entry or paid entry
The entry price is not a revenue decision. It is a filter, and it changes who turns up.
| Free entry | Paid entry ($40–$100) | |
|---|---|---|
| Signup volume | High | Much lower |
| Who signs up | Anyone, including people with no intention of starting | People who have already decided to spend money on this |
| Completion rate | Low | Substantially higher |
| Conversion to coaching | A small share of a big number | A larger share of a small number |
| Your admin per finisher | High | Low |
| Suits | Building an audience from nothing | Filling a roster |
Free challenges are not worthless — they are how you turn a cold audience into a warm one, and if you have no list at all, that is the job in front of you. But a free challenge is a marketing exercise you will run mostly for the list, and you should judge it that way.
If clients are what you want, charge. Forty dollars is enough to stop someone signing up on a whim and small enough that it is not competing with your coaching price. It also buys the participant a reason to keep going, which is worth more than the money.
Charging turns the challenge into a product you have to sell and service: receipts, a refund position, a way for someone to pay without you sending bank details. Selling it as a one-off package from a storefront that takes card payments also gets each buyer a client account without you setting one up by hand, which matters at forty people and is unmanageable at a hundred.
Six weeks beats thirty days
Thirty-day challenges are common because a month is a tidy unit. It is the wrong length for conversion, for two reasons.
The first is that a month is barely enough time for anything a participant would pay to continue. Strength changes are just becoming visible, habits are still fragile, and someone who has been consistent for four weeks is still deciding whether they can do this. Ask them to commit at that point and you are asking before the evidence has arrived.
The second is that thirty days leaves you nowhere to make the offer. If the challenge ends on day thirty and you pitch on day twenty-eight, the pitch lands in the middle of the final push. Six weeks gives you a fortnight of results behind you and a week of runway in front — you can make the offer in week five, while people still feel the difference, and let week six be the finish rather than the sales pitch.
Six weeks also fits a quarter with room around it: run, close out, rest, prepare, run again.
Keep the daily actions small enough to finish
The most common design failure is asking for too much. A challenge that wants a workout, a full food log, ten thousand steps, three litres of water, a sleep target and a daily photo has a completion rate near zero by week three — and every person who drops out has just learned that being coached is something they fail at. That is a worse outcome than not running the challenge.
Three actions. One training, one nutrition or lifestyle, one social:
- Three sessions a week, from the program you provide.
- Hit your protein target on five days out of seven.
- Post once a week in the group.
Note the five days out of seven. Targets that require perfection break on the first bad week and never recover, because the participant has already failed and there is nothing left to protect. Targets with slack built in survive a sick child and a work trip, which is what actually happens in six weeks. The same principle governs habit coaching more generally: the action has to be small enough to do on the worst day of the week, not the best.
Difficulty is also the main reason people quietly disappear from paid coaching, so a challenge pitched too hard is a preview of the churn you would have had anyway — the same pattern behind why coaching clients quit.
A six-week outline
| Week | What you run | What participants do | What it is for |
|---|---|---|---|
| 0 | Intake form, group opens, welcome post, baseline session | Introduce themselves, record baselines | Screening, and a group that is warm before day one |
| 1 | Daily presence in the group, reply to every first post | Start the three actions | Nobody feels invisible in week one |
| 2 | Short lesson: protein, or steps, or sleep | Keep going, first weekly check-in | Teach one thing well |
| 3 | Mid-point performance retest | Retest, compare to baseline | Visible progress before motivation dips |
| 4 | Individual message to every participant | Adjust their actions with you | The first taste of being coached, not broadcast to |
| 5 | Final retest, then the offer | Retest, decide | Offer lands while the result is in front of them |
| 6 | Close out, results post, prize draw | Finish, submit final numbers | A real ending, and a deadline on the offer |
The individual message in week four is the part coaches skip and the part that converts. Forty personal messages is an afternoon. It is also the only point in the challenge where someone experiences the difference between a group program and a coach.
Measure something other than weight
This is a design decision, not a disclaimer. Challenges that rank people by kilos lost are won by whoever dehydrates hardest, and they cause real harm to people whose relationship with food is already fragile — which, in any group of forty, is several of them.
Percentage of body weight is the usual workaround. It is not one. It is the same leaderboard with the arithmetic hidden: it still ranks people by how fast they lost weight, still rewards aggressive restriction, and still ends with a public list of who lost least. Fixing the denominator does not change what is being incentivised.
Measure these instead:
- Consistency. Actions completed out of actions set. This is the only number that should ever appear on a leaderboard, and it happens to be the behaviour you actually want to reinforce.
- Performance. Reps at a set weight, a timed carry, a distance, a step total. It improves fast in six weeks, it improves for everyone, and it is not a proxy for body size.
- Private measures. Weight, photos and tape measurements, if you take them at all, go between you and that participant only. Never announced, never compared, never posted.
Award prizes for finishing and for consistency, and draw the main prize at random among everyone who completed all six weeks. A random draw among finishers removes any reason to do something drastic in the final week, which a results-based prize actively encourages.
Public weigh-ins have no upside worth the cost. Neither do before-and-after photos posted without explicit written permission from the person in them.
Screen people before you accept them
A short intake form does two jobs: it qualifies buyers, and it identifies people for whom a competitive challenge is the wrong format.
Ask what they train now, what injuries or medical conditions apply, whether they are pregnant or postpartum, what they want out of the six weeks, and whether they have a history of disordered eating or are under care for an eating disorder. Then act on the answers. Some people should be offered one-to-one coaching instead of a place in the challenge, and some should be referred to a clinician — a challenge format, with its deadlines and its comparisons, is a poor environment for someone in recovery, and you are not qualified to manage it.
Saying "this format is not right for you, here is what I would do instead" costs you one entry fee and protects everything else.
The group does the retention work
Completion is a social outcome more than a programming one. People finish because other people can see whether they did, and because someone noticed when they posted.
What makes that work is mundane: everyone in one space, a small weekly post required of each person, you replying to every post in the first fortnight, and a weekly poll or question that is easy to answer. What kills it is a channel that is only ever you broadcasting, which participants mute in week two.
In Fitsly a cohort maps onto a community — you create it on the dashboard and add the participants yourself, since clients never join on their own, and everyone gets a shared feed plus a group chat with the same members. Polls are coach-only, so the weekly question stays yours to ask.
Make the offer in week five, not week six
Week six is the ending. People are finishing, submitting numbers and feeling good about it, and an offer dropped into that is competing with the celebration.
Week five is better because the retest has just happened, the result is in front of them, and there is still a week in which they can say yes without it feeling like a farewell. Make it individually, in a message, referencing something specific from their six weeks — not as a group announcement.
Three things the offer needs: a normal price, a deadline, and a reason to continue now rather than in January. Do not offer a permanent discount to challenge finishers. A time-boxed first month, or their place in the group carrying over, is fine; a lower monthly rate forever tells them what the real price is and you will never raise it.
As a planning assumption, converting something in the range of one in ten to one in four finishers is a reasonable outcome for a well-run paid challenge, with free challenges landing well below that. Treat those as ranges to plan against rather than benchmarks to be judged by — the number moves enormously with how targeted the entry was.
Converting them is the start. Keeping them is a separate problem, and the first ninety days decide it — see how to retain online coaching clients.
Prizes and entry fees have rules — check yours
Competitions and prize draws are regulated, and the rules vary by country and, in Australia, by state. Whether you need a permit, what terms you must publish, and what you can require of entrants all depend on where you and your entrants are, and on whether the prize is awarded by skill or by chance. Check your own jurisdiction or ask someone qualified before you announce a prize. This is not legal advice and it should not be the last thing you read on it.
Separately, taking entry fees makes this a sale. Publish what happens if someone drops out in week two, before someone asks.
One challenge is a spike; four a year compounds
A single challenge produces a burst of signups, two or three clients and a list that is cold by the following quarter. That is not a failure of the format. It is what running something once does.
The second run is cheaper in every way. The program is written, the weekly lessons exist, the intake form works, and you know where people dropped off last time and can fix that week. Finishers who did not convert are the warmest people you will ever pitch — they have already done six weeks with you — and they come back for the next one. Past participants refer, because a six-week commitment is an easy thing to invite a friend into.
Run it quarterly, keep the same structure, change one thing each time. Four runs a year is a recruitment channel. One run is an event you will remember fondly and not repeat.
