Joints in old age: maintaining stability, strength and safety

• Ageing not only affects the cartilage: muscles, bones, tendons, ligaments and the nervous system all change together.
• Strength is a central, controllable factor for joint stability and everyday safety.
• Endurance and regular exercise increase resilience, balance training can reduce the risk of falling.
• Routines count more than perfection: small, frequent units are often more realistic than infrequent, large endeavours.

With increasing age, tissue and movement control change gradually. This is normal and affects not only the joint itself, but also the interaction between cartilage, bones, muscles, tendons, ligaments, joint capsule and nervous system. Two things happen in parallel: on the one hand, the speed of regeneration of many tissues decreases. On the other hand, adaptability is fundamentally retained. This is precisely where the leverage lies in everyday life: strength, resilience and a sense of movement can often be improved or maintained with consistent and controlled exercise.

The perspective is also important: age is not a switch that flips from healthy to ill. Rather, it is a life span with phases. In the forties and fifties, muscle strength and exercise habits often take centre stage, while balance, responsiveness and recovery become more important later on.

Articular cartilage is a smooth, elastic tissue that distributes pressure and reduces friction. The composition and metabolism change with age: the cartilage tends to bind less water, the matrix becomes less adaptable and the reaction to stress stimuli can become slower. Review articles also state that aging mechanisms in joint tissues may be associated with degenerative changes.

However, this does not mean that exercise is fundamentally harmful. On the contrary: cartilage is supplied with nutrients through loading and unloading. The decisive factor is the amount. Even, joint-friendly loading and well-managed muscles can help to reduce pressure peaks. When pain occurs, it is often not the movement itself that is the problem, but a too rapid increase, insufficient recovery or unfavourable technique.

Bones are constantly being remodelled. In younger years, building processes usually predominate; later, the balance often shifts toward breakdown. This can reduce bone density, especially in people with an increased risk of osteoporosis. At the same time, it is not only density that is key, but also the structure and the ability to absorb forces in everyday life.

Bones react to mechanical stimuli. Muscle traction and weight-bearing activities are therefore important signals. Guidelines and reviews emphasise that muscle-strengthening activities, weight-bearing exercise and targeted balance training can be useful components, especially as part of a comprehensive approach to reducing the risk of falls and fractures. (Brooke-Wavell et al., 2022; Dent et al., 2023)

Many people first notice a loss of strength as they get older, not necessarily a visible loss of muscle. Behind the loss of strength are changes in the muscle itself, but also changes in neuromuscular control, i.e. how quickly and precisely nerves and muscles work together. (Cruz-Jentoft et al., 2019; Nùñez-Lisboa et al., 2023)

This is important for joints: strength and coordination determine how stable a joint is. When the muscles around the hips, knees, feet and torso work in a controlled manner, loads are better distributed and impacts are better absorbed.

Tendons and ligaments transfer forces and stabilise joints. With increasing age, they can become stiffer and often take longer to adapt to stress. Some people experience this as a longer warm-up phase or as sensitivity when changing direction quickly.

Connective tissue also reacts to training, but usually more slowly than muscles. That’s why a conservative build-up is worthwhile: regularly, with proper technique, with sufficient recovery and with slowly increasing exertion. Especially in old age, the motto should be: a little less per unit, but more often and on a long-term basis.

Balance is teamwork. Sensory organs provide information, the brain processes it and muscles implement corrections. With age, reaction and strength development can become slower, and movement patterns often become more cautious. This increases the risk of falling in everyday life, especially in situations with distractions, uneven ground or fast rotary movements.

Not everything can be controlled, but many things can be supported. For most people, individual ideal exercises are less important than a reliable system. The following building blocks are considered particularly relevant because they directly contribute to joint stability, resilience and safety.

In everyday life, strength means: climbing stairs, getting up, carrying things, catching stumbles. Guidelines recommend muscle-strengthening activities at least two days a week for older adults. Choose exercises for large muscle groups, for example squat variations, lunge variations, pull and push exercises, hip extension, calf work and core stability. Increase slowly and pay attention to controlled execution. (WHO, 2020)

Endurance training supports the heart and circulation and improves general resilience. This can indirectly relieve the strain on joints because everyday walking is less tiring. For older adults, at least 150 minutes of moderate or 75 minutes of intensive endurance activity per week are recommended, supplemented by additional exercise if possible. Continuity is crucial: it is better to do this regularly on a moderate scale than rarely on a very large scale.

Balance improves when it is consciously trained. Examples include tandem standing, one-legged standing, slow changes of direction, standing up without support or walking while performing tasks such as turning your head or counting. Safety is important: perform the exercise close to a stable support and choose a difficulty level that challenges you but doesn’t put you at risk of falling. (Sherrington et al., 2017)

Mobility is useful when it facilitates functional movements, such as tying shoes, squatting or climbing over a step. Gentle mobility exercises and active movements within a pain-free range can help, especially after long periods of sitting. However, mobility is not a substitute for strength. In practice, the combination often works best: mobilise first, then strengthen.

Many people overestimate what is possible in a week and underestimate what can be achieved in three months. A functioning routine is usually short, concrete and well embedded in everyday life. Three examples: five minutes of mobility in the morning, ten minutes of brisk walking after lunch, and two fixed strength sessions per week.

This pattern is an example and can be adapted to fitness, everyday life and preferences. If you have pre-existing conditions, osteoporosis or an increased risk of falling, personalised guidance is advisable.

• Two to three strength sessions per week, 20 to 40 minutes each
• Two to five endurance sessions per week, for example brisk walking, cycling or swimming
• Balance and mobility on most days, often five to ten minutes is enough to get started
• One to two very light days per week for recovery, depending on the load

Good training feels challenging but controllable. Slight muscle fatigue is normal. By contrast, warning signs include severe or persistent pain, noticeable swelling, new instability, or a clearly reduced sense of confidence.