cardiostrong adjustable-length Vario crank shortener

Adjustable crank arm for exercise bikes

Exercise bikes usually have crank arms that require a certain degree of flexion and extension in the knee and hip joints (approx. 120° of knee flexion). However, if the user's mobility is restricted due to injury, surgery, or degenerative joint changes, the crank arm can be shortened using the cardiostrong adjustable-length Vario crank shortener. This means that you can still train on an exercise bike even if you have limited mobility.

Areas of use:

• Supporting joint mobility
• Cartilage training in cases of osteoarthritis
• Rehabilitation following leg injuries
• Training the cardiovascular system

Thanks to the adjustment mechanism of the cardiostrong adjustable-length Vario crank shortener, the crank length can be freely adjusted for lengths between 40 and 170 mm . This significantly reduces the required flexion and extension, providing substantial joint relief. The required knee flexion can be lowered to approximately 65°.

Adjustable crank arm

A vario crank allows users to adjust the length of the crank arm on an exercise bike to suit their height and physical needs. This helps to reduce strain on the joints and minimise the risk of injury or pain during exercise.

If the crank arm is too long, it can put strain on the knee, hip and ankle joints, causing pain. Conversely, if the pedal arm is too short, the user may not be able to apply sufficient force, resulting in an ineffective workout.

With a vario crank shortener, the user can adjust the length of the crank arm to optimise the position of the pedal for effective and safe movement. This is particularly important for users with an injury, illness or disability that impairs their mobility.

In general, using a vario crank on an exercise bike can help to make training more effective and safer, and reduce the risk of injury.

Variable crank length

The length of an adjustable crank arm, also known as a 'vario crank' or 'crank shortener', can affect knee and hip flexion while cycling. A longer crank arm results in a greater range of motion, and thus a greater flexion angle of the knee and hip. Conversely, a shorter crank arm results in a smaller range of motion and thus a smaller flexion angle.

Lengthening a crank arm can help increased mobility and range of motion for people with limited knee or hip flexion. However, if the crank arm is too long, it can lead to strain on the knee or hip, particularly if the person already has knee or hip problems. Conversely, a shorter crank arm can reduce strain for those with limited muscle strength or joint injuries.