75 Hard vs Winter Arc vs the Great Lock In: Which Fits You
Roon Team
75 Hard vs Winter Arc vs the Great Lock In: Which Fits You
75 Hard is a fixed 75-day program with five daily tasks and a full restart on any miss. Winter Arc is a self-written 90-day sprint from October 1 to December 31. The Great Lock In is a four-month commitment, September 1 to December 31, with no official rules at all. Pick by how much structure you keep when nobody is checking.
All three land in the same dark quarter of the year. They differ on the one axis that predicts whether you finish: what happens when you miss a day.
Key Takeaways
- 75 Hard gives you five non-negotiable daily tasks and resets to day 1 if you miss any of them. It is the only one with real consequences.
- Winter Arc lets you write your own three to five rules for 92 days (October through December). Structure without a penalty.
- The Great Lock In is a 122-day intent (September through December) with no rules, no restart, and no single founder. A deadline, not a program.
- The variable none of them address is caffeine: every version either bans energy drinks or adds early alarms, and most do both.
What Each Challenge Actually Is
75 Hard was created by entrepreneur Andy Frisella in 2019. He calls it a "mental toughness program," not a fitness or diet plan. It is the first phase of his year-long Live Hard program. The rules are fixed, public, and free. A paid app exists but is optional.
Winter Arc was coined by Miami creator Carly Berges (@carlyupgraded) in a fall 2024 TikTok that passed 4.5 million views. The convention is October 1 to December 31. There are no official rules. Participants write their own daily "non-negotiables," which is why you will see wildly different Winter Arc rule sets across TikTok.
The Great Lock In surfaced on TikTok in mid-August 2025 and runs September 1 to December 31 (122 days). No single founder, no official rules, no restart penalty. Creator Tatiana Forbes (@_tatianaforbes), whose post drew over 800,000 views, said: "Seventy-five hard, the Winter Arc, The Great Lock In, they're all the same thing" (CP24). She is right about the intent. She is wrong about the rules and penalties, which is where your decision lives. For a deeper look at the Lock In's dates and format, see our full guide.
75 Hard vs Winter Arc vs Great Lock In: The Rules Side by Side
| Criterion | 75 Hard | Winter Arc | The Great Lock In |
|---|---|---|---|
| Start date | Any day | Oct 1 (convention) | Sep 1 |
| Length | 75 days | ~92 days (Oct 1 – Dec 31) | 122 days (Sep 1 – Dec 31) |
| Who sets the rules | Andy Frisella | You | You |
| Number of daily tasks | 5 | 3–5 (self-written) | None required |
| Workout requirement | Two 45-min sessions, one outdoors | Whatever you write | None |
| Water requirement | 1 gallon plain water | Whatever you write | None |
| Reading requirement | 10 pages nonfiction/self-improvement | Optional | None |
| Alcohol | Banned for 75 days | Your call | Your call |
| Diet rule | Structured diet, no cheat meals | Your call | Your call |
| Progress photo | Daily | Optional | None |
| Missed-day policy | Full restart at day 1, no substitutions | No penalty (unless you write one) | No penalty |
| Cost | Free (optional paid app) | Free | Free |
Sources: andyfrisella.com, Cleveland Clinic, Dexerto, CP24
What a Missed Day Costs You
This single row predicts your outcome more than the workout count or the water number.
On 75 Hard, a missed day sends you back to day 1. Miss day 63, start over. That restart penalty is the entire point: you either did all five tasks today or you did not.
Winter Arc and the Great Lock In have no built-in penalty. You can resume the next morning. That means accountability is entirely internal. Most people who "fall off" Winter Arc do not dramatically fail; they quietly stop posting.
The tradeoff runs both directions. The restart penalty makes 75 Hard effective for people who respond to external constraints. It also makes it impractical for anyone with an unpredictable schedule, young kids, or a travel-heavy job where a mandatory outdoor workout at 11 p.m. in December is not always possible.
What Each One Does to Your Coffee and Energy Drinks
75 Hard does not ban coffee or caffeine. You can drink anything that fits the diet you chose. The catch: the gallon is plain, still, unflavored water only. Coffee, tea, sparkling water, and electrolyte mixes do not count (75 Hard FAQ). Alcohol is out for all 75 days.
Winter Arc and the Great Lock In have whatever caffeine rule you write. In practice, most templates include "no energy drinks" or "no sugar." That sounds simple until you look at the numbers: a 16 oz Monster has 160 mg of caffeine and about 54 g of sugar (Caffeine Informer), while a 12 oz Celsius has 200 mg of caffeine with zero sugar. Cutting energy drinks might cut your sugar, your caffeine, or both. Those are different problems.
The FDA ceiling is 400 mg of caffeine per day for healthy adults. The real issue is not the limit; it is that "no energy drinks" replaces counting with guessing. For the full comparison, see our energy drinks vs coffee breakdown.
What Each One Does to Your Sleep
Every version of these challenges pushes you into early mornings during the darkest months. Most Winter Arc templates include a 5 a.m. alarm. 75 Hard's two 45-minute workouts usually mean training before work. The Lock In has no alarm rule, but TikTok's social pressure skews early.
Daylight Saving Time ends November 1, 2026 (timeanddate.com). Sunset will land between 4:30 and 5:30 p.m. by mid-November. You are waking in the dark and training in the dark.
A 2013 study in the Journal of Clinical Sleep Medicine (Drake et al., n=12) found that 400 mg of caffeine taken 6 hours before bed still reduced total sleep time. Caffeine's half-life in most adults runs 5 to 6 hours. If your last caffeine is at 2 p.m. and you sleep at 10, you are fine. At 4 or 5 p.m., you are borrowing from tomorrow's discipline to fund today's. On 75 Hard, that borrowed night is especially expensive: one groggy morning where you skip the outdoor workout resets the counter. More on caffeine half-life and the six-hour cutoff.
Pick This One If...
Pick 75 Hard if you respond to rigid external rules, have 90-plus minutes a day for training, and will accept a restart. The fixed structure removes every decision except execution.
Pick Winter Arc if you want structure you can tune. Write three to five rules, set your own difficulty, and get a 90-day window with a community around it. Best for someone who has tried 75 Hard and found the restart crushing, or who needs rules that flex around an irregular schedule. We built a rule template and start-date calendar.
Pick the Great Lock In if you already have a routine and just need a deadline. The Lock In works as a container for existing habits, not as a program for building new ones. More on what "lock in" means and how to run focused blocks.
A note on 75 Soft: if you want 75 Hard's shape without the restart, the unofficial 75 Soft swaps to one 45-minute workout per day (with one active-recovery day per week), 3 liters of water, 10 pages of any book, and allows alcohol socially. No restart on a miss.
Can You Stack Them?
The calendar allows it. The Great Lock In starts September 1. Winter Arc starts October 1 inside it. A 75 Hard run beginning January 1, 2027 would end March 16, 2027. September through December becomes your ramp; January through March becomes the rigid block.
What does not work: running two rule sets in December. If your Winter Arc says "train five days a week" and you start 75 Hard on December 15, you will have conflicts, not discipline. One framework per month.
How to Choose a Seasonal Discipline Challenge
The choice is structural, not motivational. 75 Hard gives you rules and a penalty. Winter Arc gives you a template and a community. The Great Lock In gives you a deadline and nothing else. The best one is the one whose accountability model matches how you actually behave when the novelty wears off and it is November.
Frequently Asked Questions
Is Winter Arc the same as 75 Hard?
No. Winter Arc is a self-written 90-day challenge (October 1 to December 31) with no fixed rules and no restart penalty. 75 Hard is a fixed 75-day program with five specific daily tasks and a mandatory restart on any miss. The intent overlaps. The structure does not.
Is the Great Lock In the same as Winter Arc?
They share the idea of a fall-to-winter sprint, and TikTok creator Tatiana Forbes has said they are "all the same thing." But the Lock In starts September 1 (Winter Arc starts October 1), and the Lock In has no standard rules. Winter Arc at least has a convention of three to five daily non-negotiables.
Which is harder, 75 Hard or Winter Arc?
75 Hard, by a wide margin. Two daily workouts (one outdoors), a gallon of water, 10 pages of reading, a strict diet with no alcohol, a daily photo, and a full restart on any miss. Winter Arc's difficulty depends entirely on what rules you write for yourself.
Can you drink coffee on 75 Hard?
Yes. Coffee is allowed as long as it fits the diet plan you chose. The only restriction is that coffee does not count toward the one-gallon water requirement, which must be plain, still, unflavored water.
What is 75 Soft?
An unofficial modification of 75 Hard: one 45-minute workout per day (one active-recovery day per week), eat well with alcohol allowed socially, 3 liters of water daily, 10 pages of any book. No restart penalty. Runs for 75 days.
Can you do Winter Arc and 75 Hard at the same time?
A 75-day block fits inside Winter Arc's 92-day window, but 75 Hard's rules will override anything you wrote for Winter Arc. You would just be doing 75 Hard with a Winter Arc label. Better to sequence them: Winter Arc in October through December, 75 Hard starting January 1.
One Caffeine Rule for 75 Hard, Winter Arc, and the Lock In
Every version of these challenges hits the same wall around week three: the alarm fires at 5 a.m., it is dark, and the thing that got you through yesterday was a late-afternoon energy drink that kept you up until midnight. The caffeine plan is the rule none of them write for you.
Roon is an 80 mg caffeine pouch with 60 mg L-theanine, 25 mg methylliberine (Dynamine), and 5 mg theacrine (TeaCrine). Methylliberine slows caffeine clearance: a double-blind, placebo-controlled pharmacokinetic study (Mondal et al.) found co-administration extended caffeine's half-life from 7.2 to 15 hours and cut clearance from 41.9 to 17.1 L/hr, with no increase in peak concentration (study). That study used 100 mg methylliberine with 150 mg caffeine, four times Roon's 25 mg dose and roughly 1.9 times the caffeine, so the effect at Roon's dose is directionally the same but not identical. The felt window is 6 to 8 hours. Stop at least 8 hours before bed.
For 75 Hard specifically: a pouch is not a beverage, so it should not conflict with the gallon rule, though Frisella's official FAQ does not address pouches specifically. It does contain sucralose, so if your chosen diet is strict whole-foods, decide that before day 1. Zero sugar, zero calories, zero nicotine. From $9.16 per tin on subscription, $15.00 one-time for four tins. 80 mg fits under the 400 mg daily ceiling alongside a morning coffee. Try Roon.
Related from Roon
- Winter Arc 2026: Rules, Start Date, and a Free Daily Template
- The Great Lock In 2026: Dates, Rules, and How to Actually Finish
- How Long Does Caffeine Stay in Your System?
- Energy Drink vs Coffee: Caffeine, Sugar, and Cost Compared
Written by Roon Team
