75 Hard Challenge: Complete Guide, Rules, and What to Expect

The 75 Hard challenge has taken social media by storm, with millions attempting this 75-day mental toughness program. But what exactly is it, does it work, and is it right for you?

Here's everything you need to know about 75 Hard—the rules, the science, the risks, and honest advice for deciding whether to attempt it.

What Is 75 Hard?

75 Hard is a mental toughness program created by entrepreneur Andy Frisella. It's not marketed as a fitness program, though fitness is a major component. The goal is building discipline, mental resilience, and self-confidence through 75 consecutive days of challenging habits.

The program has no flexibility. If you miss any requirement on any day, you start over from day one.

The 75 Hard Rules

Every day for 75 days, you must complete all of the following:

1. Two 45-Minute Workouts

One workout must be outdoors, regardless of weather
Workouts must be at least 3 hours apart
Active recovery and walking count if done intentionally as exercise

2. Follow a Diet

Any diet you choose, but you must have clear rules
No alcohol whatsoever
No cheat meals or unplanned deviations

3. Drink One Gallon of Water

One gallon (128 oz / 3.8 liters) of water daily
Other beverages don't count toward this total

4. Read 10 Pages of Non-Fiction

Must be a physical book (audiobooks don't count in the original rules)
Self-improvement, business, or educational content
No fiction

5. Take a Progress Photo

One photo every day
Tracks physical changes over the 75 days

The Zero-Tolerance Policy

Miss any single requirement? Start over from day one. No exceptions, no modifications, no "I'll make it up tomorrow."

This strict rule is the point—it's designed to build mental toughness through unwavering commitment.

The Appeal of 75 Hard

People attempt 75 Hard for several reasons:

Building Discipline

The rigid structure forces daily discipline. There's no "I don't feel like it today." You either do it or restart.

Proving Something to Yourself

Completing 75 Hard provides concrete evidence of your ability to commit to something difficult. Many people report increased self-confidence.

Physical Transformation

90 minutes of daily exercise plus a clean diet typically produces significant physical changes.

Breaking Bad Habits

The no-alcohol rule and strict diet eliminate common habits many people want to break anyway.

Community and Accountability

The massive online community provides motivation, support, and accountability.

The Science Behind 75 Hard

Let's examine what research says about the program's components:

Exercise Benefits

Two daily workouts totaling 90 minutes exceeds standard exercise recommendations. This level of activity can improve:

Cardiovascular health
Body composition
Mental health
Sleep quality
Energy levels

However, 90 minutes daily without rest days may be excessive for some people.

Hydration

One gallon is significantly more than most guidelines suggest. For reference:

General recommendation: 8-10 cups (64-80 oz)
Active adults: Up to 100 oz
75 Hard requirement: 128 oz

This amount is safe for most healthy adults but can be excessive for smaller individuals or those with certain health conditions.

Reading

Daily reading has documented benefits for stress reduction, cognitive function, and personal development. Ten pages is achievable but meaningful.

Habit Formation

Research suggests habits typically form in 18-254 days, with 66 days being average. 75 days aligns well with habit formation science.

The Restart Rule

This creates a powerful psychological mechanism. The fear of restarting from day one increases commitment and reduces the temptation to "just skip today."

Potential Benefits

Completers commonly report:

Improved discipline and follow-through
Better relationship with exercise
Reduced alcohol consumption or eliminated drinking
Weight loss and improved body composition
Increased energy and mental clarity
Stronger sense of self-efficacy
Better daily habits overall
Improved focus and productivity

Potential Risks and Concerns

The program isn't without criticism:

Overtraining Risk

90 minutes of daily exercise with no scheduled rest days can lead to:

Overuse injuries
Chronic fatigue
Decreased performance
Hormonal disruption

Especially if both workouts are high-intensity.

All-or-Nothing Thinking

The restart rule can reinforce unhealthy perfectionism. For some, a single slip leading to complete restart may be demoralizing rather than motivating.

Unsustainable Pace

75 days is temporary. Without a plan for day 76 and beyond, people may revert to old habits or feel lost without the structure.

Potential for Disordered Behaviors

The rigid rules around food and exercise may trigger or worsen disordered eating or exercise addiction in susceptible individuals.

Water Intake Concerns

One gallon daily may be excessive for:

Smaller individuals
People with kidney issues
Those taking certain medications
Those in cooler climates with low activity

Ignoring Body Signals

Training through pain, illness, or exhaustion to avoid restarting can cause injury or prolonged illness.

Who Should Consider 75 Hard

The program may work well for:

People with good baseline fitness seeking a mental challenge
Those who respond well to rigid structure
People looking to break specific habits (especially alcohol)
Those with no history of disordered eating or exercise addiction
People who have adequate time for 90+ minutes of daily exercise

Who Should Avoid 75 Hard

Consider alternatives if you:

Have a history of eating disorders or exercise addiction
Are new to regular exercise
Have health conditions affected by excessive water intake
Cannot commit 90+ minutes daily to exercise
Respond poorly to all-or-nothing frameworks
Have injuries or chronic conditions requiring rest days

Modifications and Alternatives

75 Soft

A gentler alternative with similar structure:

One 45-minute workout daily (can be indoors)
Follow a diet with one cheat meal per week allowed
Drink 3 liters of water (about 100 oz)
Read 10 pages daily
No alcohol

If you slip up, continue the next day—no restart required.

Sensible Modifications for 75 Hard

If you want the challenge but with safety modifications:

Exercise:

Include at least one designated rest or active recovery day weekly
Count walking as one of your workouts
Adjust intensity based on how you feel

Water:

Target 80-100 oz for smaller individuals
Increase during high activity or hot weather
Decrease if experiencing symptoms of overhydration

Diet:

Choose a sustainable approach rather than extreme restriction
Work with a nutritionist if unsure

Outdoor Workout:

Use common sense in dangerous weather conditions
A garage with the door open can count in extreme conditions

Tips for Completing 75 Hard

Before Starting

Choose your diet in advance. Have clear, specific rules written down.
Plan your workouts. Know what types of exercise you'll do and when.
Stock up on books. Have several non-fiction books ready.
Prepare your environment. Get a large water bottle, set up outdoor workout options, clear your schedule.
Tell people about it. Accountability increases success rates.
Consider timing. Starting during a vacation or major life transition may set you up for failure.

During the Challenge

Morning outdoor workout. Get it done early before weather, schedules, or willpower become issues.
Carry water everywhere. A gallon is a lot—spread it throughout the day.
Make reading a ritual. Same time each day, no screens nearby.
Walking counts. A 45-minute walk is legitimate exercise.
Plan for obstacles. Travel, illness, bad weather—have contingencies ready.
Find community. Online groups provide support and accountability.
Track everything. Use an app or journal to ensure you don't forget any component.

Managing the Outdoor Workout

The outdoor requirement is often the hardest part. Strategies:

Walking is valid. A 45-minute outdoor walk counts.
Early mornings. Beat the heat or crowds.
Embrace bad weather. Rain jackets, layers, and the right gear make almost any weather manageable.
Find covered outdoor spaces. Pavilions, overhangs, carports—technically outdoors.
Lower intensity outdoors. Save hard workouts for the indoor session.

What Happens After Day 75?

This is crucial. Without a transition plan, many people:

Immediately indulge in everything they restricted
Feel lost without the rigid structure
Return to old habits within weeks

Planning for Day 76 and Beyond

Don't eliminate everything at once. Keep some habits and gradually reintroduce flexibility.

Maintain exercise. Maybe not 90 minutes daily, but continue regular movement.

Keep reading. Even 5-10 pages daily maintains the habit.

Moderate alcohol if reintroducing. Don't go from 75 days without to binge drinking.

Create a sustainable routine. Use what you learned about discipline to build lasting habits.

The Verdict

75 Hard can be a powerful experience for the right person. It's genuinely difficult, and completing it does build discipline and prove something to yourself.

But it's not magic, and it's not for everyone. The program can:

Create real positive change when approached sensibly
Cause injury or burnout when taken too literally
Reinforce unhealthy patterns in susceptible individuals
Fail to produce lasting change without a post-challenge plan

My honest take: The core principles—daily exercise, clean eating, reading, hydration—are valuable. The rigid structure works for some personalities. But mandatory 90 minutes of daily exercise with no rest, the gallon of water, and the complete restart rule make it unnecessarily extreme for most people.

Consider 75 Soft or a modified version that maintains the discipline-building aspects without the risks. Or, if you're ready for the full challenge and understand the risks, go for it—just train smart and listen to your body.

Whatever you choose, remember: the goal is building lasting habits, not just surviving 75 days.