Abstract: Disclosed is a weightlifting disc (1) which comprises a disc part (10) of elastomeric material, wherein the disc part (10) comprises an outer edge (11) and an inner edge (12), wherein the inner edge (12) is arranged close to a center (13) of the disc part (10) and the outer edge (11) of the disc part (10) is distal from the center (13) of the disc part (10). The weightlifting disc (1) further comprises at least one reinforcing device (20), arranged into the disc part (10) circumferentially around the center (13), between the outer edge (11) and the inner edge (12) of the disc part (10), wherein the reinforcing device (20) is arranged at a distance (a) from the inner edge (12) of the disc part (10) such as elastomeric material is arranged between the inner edge (12) of the disc part (10) and the reinforcing device (20).

Abstract: A dumbbell having a shaft, first and second dumbbell heads, respectively fixedly connected to first and second ends of the shaft, a tube-shaped hollow grip rotatably arranged around the shaft having first and second ends. An inner diameter of the grip is greater than an outer cross-sectional dimension of the shaft. The dumbbell further having a first ball bearing and a second ball bearing, wherein an outer ring of the first ball bearing is connected to the first dumbbell head, and an inner ring of the first ball bearing is fixedly arranged to the first end of the hollow grip, and an outer ring of the second ball bearing is connected to the second dumbbell head, and an inner ring of the second ball bearing is fixedly arranged to the second end of the hollow grip.

Abstract: A dumbbell having a shaft, first and second dumbbell heads, respectively fixedly connected to first and second ends of the shaft, a tube-shaped hollow grip rotatably arranged around the shaft having first and second ends. An inner diameter of the grip is greater than an outer cross-sectional dimension of the shaft. The dumbbell further having a first ball bearing and a second ball bearing, wherein an outer ring of the first ball bearing is connected to the first dumbbell head, and an inner ring of the first ball bearing is fixedly arranged to the first end of the hollow grip, and an outer ring of the second ball bearing is connected to the second dumbbell head, and an inner ring of the second ball bearing is fixedly arranged to the second end of the hollow grip.