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A recent study has revealed that aerobic workouts might be the best way to alleviate the pain and stiffness linked to knee osteoarthritis. The research was published in The BMJ and evaluated 217 clinical trials involving over 15,000 individuals suffering from knee osteoarthritis. The aim was to determine which physical activities, such as walking, cycling, swimming, strength training, or mind-body methods, produced the best outcomes for pain relief, mobility, walking ability, and daily functioning. Knee osteoarthritis is a common joint issue where the cartilage cushioning the bones in the knee gradually deteriorates. This leads to pain, swelling, and difficulty walking. This condition typically affects adults over 45 years old, and many still experience considerable discomfort even after treatment. Current guidelines usually advocate for exercise but often fail to specify the most effective type. This new examination provides stronger, research-backed recommendations, indicating that aerobic exercises like walking, cycling, and swimming are generally the most beneficial for many sufferers of knee osteoarthritis.

The research team reviewed 217 randomized controlled trials conducted from 1990 to 2024. They assessed various exercise types, including aerobic, flexibility, strength training, mind-body (like yoga or tai chi), neuromotor, and mixed programs, against control groups that participated in little or no exercise. The primary outcomes they measured included pain levels, physical ability, walking performance, and overall quality of life, evaluated at short term (4 weeks), mid-term (12 weeks), and long term (24 weeks). Almost across the board, aerobic exercise proved to be the most effective choice. Aerobic activities lessened knee pain in both the short and mid-term, and enhanced physical function at all time points. They also improved walking skills and quality of life in the short and mid-term. On the other hand, other types of exercise like strength training or mixed programs showed limited benefits and were mainly suggested as supplements to aerobic workouts rather than primary treatments.

Aerobic exercises involve consistent, rhythmic movements like walking, cycling, swimming, and light jogging. These activities promote steady heart and lung function and enhance blood flow and joint lubrication in the knee. The findings indicate that this combination may help lower inflammation, strengthen the muscles surrounding the knee, and boost balance and coordination, benefiting the injured joint. Since the knee supports weight, high-impact activities can sometimes make pain worse. Therefore, gentle activities such as walking, cycling on level surfaces, and swimming or exercises in water are recommended. A significant worry for individuals with knee osteoarthritis is whether exercising might further harm the joint. The recent review found that, in general, exercising is safe. However, the researchers noted some constraints. Many comparisons were indirect, and some outcomes did not have extended follow-up beyond 24 weeks. Additionally, smaller trials could have affected early results. Nonetheless, aerobic exercise can be considered as a non-drug option for treating knee osteoarthritis.

According to the research, specialists suggest aerobic workouts “as the primary approach for managing knee osteoarthritis, especially when the goal is to enhance physical ability and lessen discomfort. ” The study advises engaging in aerobic exercises 3 to 5 times weekly for around 30 to 45 minutes at a moderate level. Here is an easy plan to begin with:

Walking on even surfaces or using a treadmill, starting with 10 to 15 minutes and slowly increasing the time.
Riding a bike, either on a stationary bike or outside, to minimize stress on the joints while still exercising the legs.
Swimming or participating in water aerobic classes, which can be beneficial if walking on solid ground causes significant pain.