The Pure2Improve Sprint Sac is extremely ideal for resistance training, running with the additional resistance of the weight will make you a stronger runner, meaning it will not only improve your speed and endurance but will also strengthen your joints, burn more calories, improve bone health, improve body posture and also makes you less likely to get sports-related injuries.
Features:
- Variable weight used for speed and strength training.
- Includes 3 sustainable ballast bags, each bag can be filled with up to 5 kg of sand (15 kg in total). Sand Not Supplied
- Reinforced bottom allows it to be used on many surfaces.
