Relentless: Mental Toughness
Build a mind so tough it scares people.
Relentless is the first mental performance app that connects competitive athletes with REAL mental performance experts.
Daily mental toughness drills, built for athletes who compete, from REAL industry professionals.
Daily Guided Lessons
3-5 minute lessons crafted by a mental performance expert, grounded in sports psychology. These lessons not only teach you the exercises, but also the science — because believing in your training is half the battle.
Full Lesson Library
Short sessions across the MAC framework: Mindfulness, Acceptance, and Commitment. Isolate the exercises and go deeper in the areas you need most.
Journal
Log how you feel before and after competition. The app saves your entries so you have a backlog of how your mental state was when you performed well, vs. poorly.
The Problem – Why we built relentless
You are a competitive athlete. You have stood at the line of the most high-stakes competitions in your sport. The fitness was there. The work was done. But you still didn’t feel ready.
The missing link? A mental routine you could always fall back on.
Nobody had a real tool for this. Just motivational quotes or meditative talks. No framework. No daily practice. No system was built for athletes who actually compete.
So I obsessed, and we built one.
“We fear the nerves more than we fear the race.”
Key Studies:
The MAC framework (Mindfulness, Acceptance, Commitment) is the most studied mental performance approach for athletes — developed in 2001 and validated across elite sport.
Gardner and Moore (2001)
The original MAC development represents a “third-wave” shift in sports psychology. Unlike traditional Psychological Skills Training (PST), which focuses on controlling or suppressing negative thoughts and anxiety, MAC teaches athletes to accept internal states while committing to task-relevant actions. The same duo later proved this improvement could be measured (2012).
Marcora, et al. (2009)
In a landmark study, cyclists who performed 90 minutes of cognitive tasks hit physical exhaustion 15% sooner than those who simply watched neutral documentaries. Despite both groups having identical heart rates and lactate levels, the mentally fatigued group perceived the work as harder, proving your brain triggers the “quit” signal long before your muscles do.
Sabzevari, et al. (2023)
A randomized controlled trial with 34 elite beach soccer players. Players in the MAC group saw meaningful gains in cognitive flexibility and improved mental performance, while also reducing rumination — the persistent loop of negative thoughts that kills athletes mid-competition. The results were consistent after a two-month follow-up, meaning the effects weren’t short-lived.
Relentless was developed in collaboration with sport psychology professionals and grounded in peer-reviewed research.
Who is Relentless for?
- Athletes who want to perform their best in every competition
- College and high school athletes managing pressure, nerves, and performance expectations
- Anyone who trains hard physically and has never trained their mind the same way
Relentless App 