These tools, made in soft plastic material, are a very good alternative to the classic and traditional rigid dumbbells.
Unlike the rigid dumbbells, Heavyball and Heavyblock do not represent a danger for the user if they accidentally hit a part of the body.
Furthermore they can be used either with hands or feet and are easily filled with water or sand to change their weight from gr. 900 up to gr. 3.000.
They can also be employed in the buildup of specific muscle groups and bodybuilding generally.
Through regular use of these tools physical stamina, strength, agility and general appearance are improved significantly.
Each pair is provided with a useful guidebook of exercises in 5 languages.