Thorza Weighted Training Balls Overload & Underload 6-Pack — Color-Coded 100–1000g

Thorza Weighted Training Balls are a six-piece overload and underload throwing set that uses progressive, color-coded weights to build arm strength, refine throwing mechanics, and support pitching velocity programs.

This training kit combines six purpose-built, non-regulation baseballs in increasing weights so players and coaches can structure warm-ups, overload/underload drills, and strength sessions with clarity. The set spans light to heavy options—perfect for gradual progression—and is constructed from high-density polymer for reliable grip and long-term use indoors or on the field. The color-coded system makes ball selection fast during workouts and keeps training plans consistent across sessions.

How do these balls fit into a pitching velocity routine?

These weighted balls let coaches and athletes work planned progressions that target arm speed, timing, and robustness without relying on vague descriptions. By alternating lighter and heavier balls, players can stimulate different neuromuscular responses and practice efficient mechanics under controlled loads. The set supports warm-up, reactive arm-speed drills, and overload sequences that many modern programs use to develop velocity safely.

• Six progressive weights from 100g to 1000g for stepwise loading
• Color-coded for quick selection during high-tempo sessions
• Suitable for both overload (heavier) and underload (lighter) drills
• Durable material withstands repeated throws and contact

What are the exact weights and how are they organized?

The kit includes six distinct, color-identified baseballs that span a wide range of loads so you can customize progressions for players of varying age and strength. Each color corresponds to a specific weight to remove guesswork and make programming repeatable from session to session. The set includes a practical jump from light to heavy to address warm-up, training, and overload phases.

• Yellow: 3.5 oz (100 g) — underload, arm-speed emphasis
• Orange: 5.3 oz (150 g) — light progression ball
• Red: 8 oz (225 g) — transitional training weight
• Green: 12 oz (340 g) — moderate overload for strength work
• Blue: 16 oz (450 g) — heavier overload for conditioning
• Black: 35 oz (1000 g) — maximum load for advanced strength drills

Are these balls durable and where can I use them?

Manufactured from a high-density polymer, the Thorza training balls are built to handle repeated throws and impacts while maintaining shape and grip. Their exterior texture provides a reliable hand feel for consistent release and control. They are designed for both indoor bullpen drills and outdoor throwing practice, but remember they are training implements and not regulation game balls.

• High-density construction for long-lasting use
• Textured surface for consistent grip across weights
• Suitable for indoor net work and outdoor field sessions
• Not meant for official game play—training use only

How do I implement the set safely in team or individual sessions?

Introduce weighted balls gradually, beginning with light warm-ups and controlled throws to assess comfort and mechanics before advancing weight. Use clearly defined reps, rest, and progression steps—document which color was used each session to track adaptation. Coaches should supervise technique closely and prioritize mechanics over load increases.

• Start with yellow and orange for warm-ups and arm speed
• Progress to red and green for strength-focused sets
• Reserve blue and black for experienced athletes under coach supervision
• Log ball colors and reps to monitor progress and recovery

Who is this for: The Thorza Weighted Training Balls 6-Pack is aimed at pitchers, infielders, coaches, and performance staff who want a comprehensive overload/underload system. It suits youth and adult programs that require a clear, color-coded progression, teams building structured throwing plans, and individual athletes targeting arm speed, coordination, and conditioned throwing mechanics. This set is a training tool — use it within a coached program or according to a staged training plan for best results.