Final answer:
Cycling is the recommended low-impact cardiovascular exercise for individuals with knee osteoarthritis due to its minimal joint stress and benefits for joint mobility and muscle strength.
Step-by-step explanation:
The recommended cardiovascular exercise for individuals with knee osteoarthritis is B. Cycling. Cycling is considered a low-impact exercise which can lessen the pain and improve symptoms of osteoarthritis. It helps maintain joint mobility, increases muscle strength, and puts relatively little stress on the joints. High-impact exercises like running, jumping jacks, and high-impact aerobics are not recommended as they can exacerbate joint pain and stress, potentially worsening the condition.
It's essential to maintain a healthy weight and avoid too much high-impact exercise to minimize joint stress and prevent injury. Regular low-impact exercise such as cycling not only contributes to cardiovascular health but also builds muscle endurance and stabilizes the joints. These activities support the protective function of muscles around the joints, which is crucial for those with osteoarthritis.