Diamond DukeCorporation

Sports • Self-Defense • Fitness

Rep the Brand. Train Like a Warrior.

Two brands built for fighters and everyday warriors — TuyaKeens sportswear worn in the ring and the gym, and Diamond Duke Fitness for boxing, self-defense and strength training.

The Future of Sportswear

The Future of Sportswear is TuyaKeens

The fight brand for the fighter and lifter in you — the new “gym rat.” We don’t sell anything. We’re a sponsorship brand: our mission is to put TuyaKeens on fighters and athletes around the world.

TuyaKeens signature warrior emblem

Nothing here is for sale — we sponsor fighters and athletes. Rep the brand in the ring and in the gym, and we’ll put you on.

TuyaKeens on Fighters Worldwide

Worn by Warriors

Boxers, MMA and Muay Thai fighters, and lifters — repping TuyaKeens across every ring and gym.

Boxing athlete repping TuyaKeens

Boxing

Repped in the ring

MMA athlete repping TuyaKeens

MMA

Worn by warriors

Muay Thai athlete repping TuyaKeens

Muay Thai

Built for the fight

Strength athlete repping TuyaKeens

Strength

For the lifter in you

Boxing athlete repping TuyaKeens

Boxing

On fighters worldwide

Strength athlete repping TuyaKeens

Strength

The new gym rat

We Sponsor, We Don’t Sell

Nothing here is for sale. We back fighters and athletes — you rep the brand, we put you on.

Fighters Around the World

Our goal is simple: TuyaKeens on fighters and lifters across the globe, in every ring and every gym.

The Future of Sportswear

A bold new look for the fighter and lifter in you — the new “gym rat” standard.

Want TuyaKeens On You? Get Sponsored.

Fighter, lifter or gym? Join the movement and rep the future of sportswear. Reach out and let’s put TuyaKeens on you.

Training — Diamond Duke Fitness

Where the Real Diamonds Shine.

Boxing. Fitness. Discipline.

Building stronger bodies, stronger minds, and stronger communities. Real-world boxing, self-defense and conditioning for all ages and levels — learn practical techniques, build confidence, and protect what matters most.

Inside The Gym

Real Training. Real Rounds.

See what training with Diamond Duke Fitness actually looks like — from the gym floor to live sparring rounds.

Now Accepting New Clients

Personalized training, kids boxing, strength & conditioning — where the real diamonds shine.

Sparring Sessions

From the ring to the backyard mats — putting in the rounds and sharpening the craft.

Diamond Duke Fitness self-defense training — confidence, awareness, power

Self-Defense

Be Prepared. Be Empowered.

Real-world self-defense training for all levels. Learn practical techniques, develop the awareness to avoid danger before it happens, and build the confidence to protect what matters most — all in a safe, supportive environment.

  • Practical Techniques
  • Awareness & Prevention
  • Confidence & Mindset
  • All Ages & Levels
Practical Techniques

Practical Techniques

Learn effective moves that work in real situations — footwork, punching and defense.

Fitness & Conditioning

Fitness & Conditioning

Improve strength, endurance, speed and agility with structured training programs.

Mental Toughness

Mental Toughness

Build discipline, focus and the resilience to keep going when it gets hard.

Self-Defense

Self-Defense

Real-world self-defense skills, awareness and the confidence to protect what matters.

Boxing Training

Real techniques, footwork, punching and defense.

Fitness & Conditioning

Strength, endurance, speed and agility.

Mental Toughness

Discipline, focus and mental resilience.

All Ages & Levels

Open to kids, teens and adults. No experience needed.

Confidence & Power

Build self-assurance that carries beyond the gym.

Self-Defense

Practical skills for real-life situations.

Membership Plans

Simple monthly memberships for every member of the family.

Most Popular

Adult Membership

$100/ month

Full-access training for teens and adults, ages 16 & up.

  • Unlimited adult & teen classes
  • Boxing, conditioning & self-defense
  • Weekend open training
  • Expert-led instruction
  • The B.L.U.E App access

Children Membership

$65/ month

Confidence-building classes for kids, ages 7–15.

  • Unlimited kids classes
  • Boxing fundamentals & discipline
  • Fitness & coordination
  • Safe, supportive environment
  • The B.L.U.E App access

Plus Membership

$55/ month

Add an extra family member to any plan at a reduced monthly rate.

  • Discounted add-on rate
  • Full class access included
  • Perfect for families & partners
  • Train together, save together
  • The B.L.U.E App access

Class Schedule

Mon / Wed / Fri

Kids Class

Ages 7–15

5:00 PM – 6:00 PM
Mon / Wed / Fri

Amateur Boxing

Ages 16 & up

6:00 PM – 7:00 PM
Mon / Wed / Fri

Adult / Teen Class

Ages 16 & up

7:00 PM – 8:00 PM
Saturday

Open Training

Optional conditioning

10:00 AM – 12:00 PM
Sunday

Open Training

Optional conditioning

10:00 AM – 12:00 PM

Find Us

Located within Pro Boxing Fitness

30 DuPage Court, Elgin, Illinois 60120

Diamond Duke Fitness logo
Boxer training with determination

Join the movement

Too busy becoming everything I said I would.

Who cares what they say. Who cares if they doubt you. Be prepared. Be empowered. Show up and put in the work — the rest takes care of itself.

Get in touch

Start Your Journey

Questions about training, classes or our fight brand? Send a message and the team will get back to you.

Call or text

(224) 400-8983

Located within Pro Boxing Fitness

30 DuPage Court, Elgin, Illinois 60120

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