美国正品代购 SKLZ 阻力伞 速度阻力训练 渐进阻力
- Provides excellent resistance training for improved speed, stamina, strength, and acceleration
- Chute releases while running for overspeed training
- 360 degree rotation belt with free motion ring and quick-release buckle for sprints and unencumbered movement
- Measures 54 by 54 inches; provides approximately 15 to 30 pounds of progressive resistance, depending on speed of user
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