A new approach to training

Train Smarter. Swing Stronger.

The first adjustable weighted warm-up tool for tennis. Reduce injuries. Amplify your performance.

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Advantages

Why The Hammer Works

  • First adjustable weighted tool for tennis
  • Reduces injury risk through smart warm-up
  • Improves power and control

Most tennis injuries happen during the first 15 minutes. Your body isn't ready for explosive movements. THE HAMMER uses contrast-weight training to activate muscles gradually. Train with added weight, then your racquet feels lighter and more responsive.

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Prepare Like a Pro

Designed for the ones who never quit

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Target Every Movement
Elbow, shoulder, wrist, core: warm up the muscles you actually use on court.
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Build Strength
Contrast-weight training strengthens while improving flexibility.
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Play Longer
Used by touring professionals who demand peak preparation

See THE HAMMER in Action

Used by professionals | Swiss engineered | Adjustable 1-3kg

Core Workout
Core Workout
Intro to The Hammer
Intro to The Hammer
Shoulder Warmup
Shoulder Warmup
Elbow Warmup
Elbow Warmup
Wrist Warmup
Wrist Warmup
Movements Warmup
Movements Warmup
The Story
The Story
The Hammer by per4max

The Hammer by per4max

★ ★ ★ ★ ☆ 258 Reviews

The first adjustable weighted warm-up tool engineered for tennis. Swiss precision meets sports science.

Key Features:

  • Adjustable Weight: 0.38-0.88kg range. Start light, progress as you build strength.
  • Tennis-Specific: Handle mimics racquet grip for sport-specific movements.
  • Swiss Engineered: Precision-crafted for durability and performance.
  • Universal: Works with any weighted ball up to 11cm diameter.

Specs:

  • Ball Weight: 0.50kg
  • Handle Weight without Ball: 0.38kg
  • Handle: 4 x 4cm
  • Length: 40.4 cm
  • Ball: Up to 11cm
Pick a Bundle
More details
Weight
0.38-0.88kg
racquet
0.38kg
ball
0.50kg
Size
racquet
40.4cm
ball
11cm
Material
high-performance
nylon fiber
CHF 200.00
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Have a question? We're here to help

Feel free to reach out via the form below or by emailing n.a@per-4-max.com — we'll get back to you shortly

You've got questions?

We've got the answers

  • First adjustable weighted tool for tennis. Handle mimics your racquet, weight adjusts 1-3kg.

  • 500g-1kg for warm-ups. Heavier (2-3kg) for static exercises only.

  • Yes. Any weighted ball up to 11cm diameter works.

  • 10-15 minutes: static exercises, dynamic movements, core activation.

  • Designed and engineered in Switzerland.

  • Yes. Start light, progress gradually. Technique over weight.