Read the following passage and answer the questions that follow. Mr. Rao is 68 years old and has been sedentar

Concept understanding — Sarcopenia Definition

Sarcopenia: When Muscle Wastes Away

You already know that as people grow older, their bodies change. Hair greys, skin wrinkles, bones may become brittle. But there is a quieter, more dangerous change happening inside: the gradual loss of muscle mass and strength. That process has a name — sarcopenia.

The Everyday Intuition

Think of a young person lifting a heavy suitcase with ease. Now picture an elderly person struggling to carry a bag of groceries. The difference is not just fitness or willpower. It is the slow, invisible erosion of the muscle tissue itself. Sarcopenia is the medical term for that erosion.

It comes from Greek: sarx (flesh) and penia (loss). Literally, "poverty of flesh."

The Precise Meaning

Sarcopenia is a progressive and generalised skeletal muscle disorder. It involves:

Loss of muscle mass — the actual tissue shrinks
Loss of muscle strength — the ability to push, pull, lift, or grip declines
Loss of physical performance — walking speed, balance, and endurance drop

It is not simply "getting weak from old age." It is a recognised disease condition, classified under the International Classification of Diseases. The key point: it is age-related but not inevitable. It can be delayed, slowed, or even reversed.

Important

Sarcopenia is distinct from frailty or disability. A person can be sarcopenic without being frail, and vice versa. The core problem is the muscle itself, not the whole body's decline.

Why It Matters

For a commerce or humanities student, you might wonder: why should I care about a muscle disease? Because sarcopenia has enormous social and economic consequences.

Loss of independence — when walking, climbing stairs, or carrying objects becomes hard, people need help with daily life
Increased fall risk — weak muscles mean poor balance; falls are a leading cause of injury in older adults
Higher healthcare costs — hospitalisations, rehabilitation, and long-term care rise sharply
Lower quality of life — the inability to do what you once did affects mental health and social participation

Sarcopenia is not a niche medical curiosity. It affects millions of older people worldwide. As populations age — and India's population is ageing rapidly — understanding sarcopenia becomes relevant to policy, insurance, healthcare planning, and even family care.

What Causes It?

Several factors work together:

Ageing itself — muscle cells (fibres) die and are not fully replaced
Hormonal changes — lower levels of growth hormone, testosterone, and oestrogen
Inactivity — "use it or lose it" is brutally true for muscle …

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Mr. Rao's symptoms are indicative of common age-related physiological declines: sarcopenia (muscle loss), reduced VO_2max (cardio-respiratory efficiency), decreased flexibility, and impaired balance, alongside low bone density.

(i) Name the age-related change responsible for his weakened grip and reduced muscle mass, and state one physiological reason for it.

The age-related change responsible for Mr. Rao's weakened grip and reduced muscle mass is sarcopenia.

Sarcopenia is the progressive and generalized loss of skeletal muscle mass, strength, and function that occurs with aging.

One physiological reason for sarcopenia is a decrease in muscle protein synthesis. As individuals age, the body's ability to synthesize new muscle proteins from dietary intake diminishes, leading to a net loss of muscle tissue over time. Other contributing factors include hormonal changes (e.g., reduced testosterone and growth hormone), chronic low-grade inflammation, and a decline in the number and function of motor neurons.

Mr. Rao's breathlessness on the stairs points to a decline in maximal oxygen uptake (VO_2max), which is a key physiological measure of cardio-respiratory efficiency. VO_2max represents the maximum rate at which the body can consume and utilize oxygen during intense exercise.

In a sedentary person, VO_2max typically declines by approximately 5-10% per decade after the age of 30. This decline is due to a combination of factors, including reduced maximal heart rate, decreased stroke volume, and diminished oxygen extraction by muscles.

(iii) Name the two age-related changes responsible for (a) his difficulty in bending down and (b) his near-falls, giving one cause of each.

Difficulty in bending down: The age-related change responsible for his difficulty in bending down is reduced flexibility (or increased stiffness). One cause of reduced flexibility is the decreased elasticity of connective tissues such as ligaments, tendons, and joint capsules. Over time, these tissues become less pliable and more rigid, limiting the range of motion around joints.
Near-falls: The age-related change responsible for his near-falls is impaired balance (or reduced proprioception). One cause of impaired balance is the decline in sensory input from various systems, including the vestibular system (inner ear), vision, and proprioceptors in muscles and joints. This reduces the body's ability to accurately perceive its position in space and make rapid adjustments to maintain stability.

(iv) Suggest one specific type of exercise for EACH of the four problems above (muscle loss, low bone density, stiffness, poor balance), and justify your choice in one line.

Here are specific exercise suggestions for each problem:

Muscle loss (sarcopenia): …

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