9 Scientifically Proven Ways to Build Muscle Fast

If you're looking for how to build muscle quickly and safely, these nine tricks are scientifically proven to help you grow muscle fast.

Add to your SPARTAN home gym with these brand new helmet kettlebells.  Helmet design is laser engraved into the kettlebell to make them unique to SPARTAN.  Durable cast iron construction that is ideal in frequent-use settings.  Available in the most commonly requested weights, making them suitable for a wide range of facilities and homes. Solid cast iron.  Sold individually.

• Cast iron construction
• Laser engraved SPARTAN helmet design
• Sold as a single unit
• Available in nine different sizes (5lb, 10lb, 15lb, 20lb, 25lb, 30lb, 35lb, 40lb, and 50lb)

Please note:

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