Every difference in one table
| — | 75 Hard | Winter Arc |
|---|---|---|
| Rules | Five, fixed, written by Andy Frisella | 3–5, written by you |
| Length | 75 days, any season | ~92 days, 1 October to New Year |
| Workouts | Two 45-min daily, one outdoors | Whatever your rules say |
| Alcohol | Banned outright | Your call — most write a weekday ban |
| Missed day | Restart from day one | Logged, arc continues |
| Photo | Daily, mandatory | Optional |
| Start date | Any day you choose | 1 October by convention, cohort effect included |
| Identity | Mental toughness program — “not a fitness challenge”, its own words | Seasonal container — no owner, no rulebook |
Two different bets
Strip the branding and these are two theories of how change happens.
75 Hard bets on the line. All decisions were made for you in 2019; your only job is obedience to them, and the restart clause makes the line mean something. The program is open that the discomfort is the product. What it trains — genuinely — is the experience of not negotiating with yourself for 75 days.
The arc bets on the season. Dark evenings and a thinned-out calendar lower the cost of every habit, the shared 1 October start supplies a cohort, and the year's end supplies a finish line nobody can move. What it trains is programme design: writing rules for your own life and running them without a referee. Which is also its known failure mode — most people write their rules too soft, and there is nobody to object.
December decides it. Run the thought experiment before choosing: it is 20 December, third event of the week, and someone hands you a glass. On 75 Hard that glass is day zero — 60 days erased. On the arc it is either within your rules or one crossed box on the tracker. Neither answer is wrong. But you already know which one you will actually live with, and that answer, not ambition in August, is the honest basis for the choice.
Who should pick which
- Pick 75 Hard if you have run structures before, your winter calendar is genuinely clear, and the thing you want from these 75 days is the absolutism itself. Read the full rules first — the two-a-days and the gallon are bigger than they look.
- Pick the arc if December contains things you will not cancel, or the habits you need are not on Frisella's list — money, a skill, a bedtime. Start at the rules page.
- Pick 75 Soft if you want fixed rules without the restart clause — it sits exactly between the two, and its no-restart design is the reason people finish it.
The 18 October trick
The two are not mutually exclusive: 75 Hard started on 18 October puts day 75 on 31 December. Hard's fixed rules running inside the arc's season, cohort and finish line — the most elegant version of both, and the most brutal, because the entire alcohol ban lands on the party season. People genuinely do this. Check what your December contains on the dates page before you decide to be one of them, and if the answer is “a wedding” — see how Soft compares instead.