Popular fitness YouTuber Will Tennyson recently completed what many consider one of the internet’s most grueling mental and physical challenges: 75 Hard.
The program promises dramatic transformations and builds qualities like determination, discipline, and mental toughness through relentless daily protocols.
But does it live up to the hype?
Tennyson documented every step of his journey, revealing both the remarkable results and unexpected struggles of pushing his body and mind to the limit for over two months straight.
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What Exactly Is 75 Hard?
The 75 Hard challenge requires participants to complete five non-negotiable daily tasks for 75 consecutive days. Miss even one, and the entire challenge resets to day one.
The demands are intense:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- Two 45-minute workouts daily (one must be outdoors regardless of weather)
- Drink one gallon of water every single day
- Follow a diet with zero cheat meals and no alcohol
- Read 10 pages of non-fiction
- Take a daily progress photo
To mark his commitment, Tennyson shaved his head before starting on January 1st. A decision he immediately questioned when facing snowy outdoor workouts in the dead of winter.
Setting Clear Goals From Day One
Tennyson entered 75 Hard with two primary objectives. First, he wanted to prove he could stick with difficult commitments regardless of motivation levels.
Second, he aimed to continue his three-month body transformation journey by building muscle while losing fat.
To track progress scientifically, he got baseline measurements on day one. A DEXA scan showed 32.4% body fat, while blood work revealed his testosterone levels fell in the lowest 10% for his age group.
These numbers would serve as crucial benchmarks for measuring real physiological changes.
The Early Warning Signs
Despite initial enthusiasm, problems emerged quickly. Just two weeks in, Tennyson noticed concerning symptoms.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Mentally I’m feeling good physically on the other hand I am tired like my body sore all the time my lower back has been bugging me but damn dude this is no joke this is no joke.
The relentless training was wearing him down and dramatically increasing injury risk. But help came from an unexpected source: fitness YouTuber Coach Greg, who had reacted to Tennyson’s previous weight loss video.
Coach Greg’s brutal but insightful feedback highlighted a critical mistake.
Pacing Makes All the Difference
And the first thing he does wrong is he starts out workout one too hard he’s saying how difficult he is he’s dying if you’re so exhausted that you’re sitting down you can hardly stand up you win too hard you wake up the next day feeling like you got ran over by a truck you get demotivated and you don’t even train.
The veteran trainer emphasized a fundamental principle: pace yourself. Going all-out every single day isn’t sustainable and leads to burnout or injury.
Tennyson took this advice to heart, restructuring his approach. He started incorporating walks for outdoor sessions and yoga for indoor workouts, reserving weekends for low-impact recovery training.
This balanced strategy proved crucial for longevity. Within weeks, he progressed from three pull-ups to four—modest but meaningful improvement.
Battling Diet Demons and Mental Fatigue
For his nutrition protocol, Tennyson maintained a high-protein, low-fat, low-sugar approach with a slight calorie deficit. The same strategy that had been working for his weight loss goals.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
But being the only person in his social circle on a strict diet with zero cheat meals allowed began taking a psychological toll around day 30.
He turned to Reveri, a self-hypnosis app founded by Stanford psychiatrist Dr. David Spiegel, to help manage cravings and maintain motivation during difficult moments.
The Unexpected Challenges
Drinking a gallon of water daily turned out to be more disruptive than anticipated, requiring constant bathroom breaks that made productivity challenging.
Daily progress photos, however, proved surprisingly motivating. Even though the scale showed minimal change, visual evidence revealed noticeable body composition improvements that fueled continued effort.
The reading requirement also exceeded expectations. Despite not considering himself a reader, Tennyson completed three books front-to-back plus four audiobooks.
In a serendipitous moment, he discovered that one book—Hidden Potential by Adam Grant—actually referenced his previous Steph Curry training video.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Hitting the Wall at Day 70
As the finish line approached, Tennyson encountered his toughest obstacle yet: severe sleep disruption. Multiple nights of waking at 3 a.m. left him running on just four to six hours of rest.
His performance metrics reflected the struggle. Strength decreased, rep counts dropped, and motivation evaporated.
Can’t lift as much weight as before can’t do as many reps just feeling horrible so yeah just feels like I’m hanging on you know just feels like I’m hanging on.
But then came a crucial realization: the old version of himself would have already quit.
He was showing up consistently despite every excuse to stop. The workouts weren’t perfect, but they were happening. That shift in mindset represented exactly the mental transformation 75 Hard promises.
The Results: Beyond Expectations
When Tennyson completed day 75 and received his final test results, the numbers told a remarkable story.
His testosterone levels skyrocketed from 2.51 ng/mL to 7.69 ng/mL—more than tripling his baseline. He went from the bottom 10% for his age to the top 10%.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Body composition changes were equally impressive:
- Lost 8.6 pounds of body fat
- Gained over 5 pounds of lean muscle
- Body fat percentage dropped from 32.4% to 27.7%
Combined with his previous three months of training, he achieved nearly a 10% reduction in body fat percentage over six months.
Key Takeaways for Anyone Considering 75 Hard
Tennyson’s experience reveals several critical lessons for those contemplating this challenge.
Don’t go all-out every session. Balancing intense training with recovery work prevents injury and burnout. Incorporating walks, yoga, and lower-impact activities on certain days makes the program sustainable.
Small wins compound over time. Daily photos capture changes that scales miss. Incremental strength gains like one additional pull-up matter more than dramatic breakthroughs.
Mental tools help during rough patches. Whether through self-hypnosis apps, meditation, or other techniques, having strategies to manage cravings and low motivation proves essential.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Consistency trumps perfection. Showing up for subpar workouts when exhausted builds the exact mental resilience the program targets. A bad workout beats no workout.
Track objective metrics. Baseline blood work and body composition scans provide concrete evidence of progress when subjective feelings fluctuate.
The Bottom Line
75 Hard delivers on its promise to build discipline and create dramatic physical transformations—but only if approached intelligently.
Tennyson’s journey demonstrates that success requires balancing intensity with recovery, using objective tracking to stay motivated, and developing mental strategies for inevitable low points.
The program’s all-or-nothing structure creates powerful accountability, but that same rigidity demands smart training decisions to avoid injury.
Perhaps most importantly, the challenge proved that showing up consistently rewires both body and mind in ways that extend far beyond the 75 days themselves.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
