Q.Complete the given diagram listing suitable exercises at various stages of life. (Stages shown: Early Childhood — a) Infant, b) Toddler, c) Child; Childhood to Adult; Youth to Old Age; After 65.)

The WHO Physical Activity Guidelines are a set of recommendations issued by the World Health Organization. They tell people of all ages exactly how much physical activity they need each week to stay healthy. Think of them like a "dosage" for movement — just as a medicine label tells you how many tablets to take, these guidelines tell you how many minutes of exercise your body requires.

The intuition is simple. Your body is designed to move. When you sit for hours every day, your muscles weaken, your heart works less efficiently, and your risk for diseases like diabetes, heart problems, and even depression rises. The guidelines exist to give you a clear, science-backed target: move this much, this often, and your body will reward you with better health, energy, and longevity.

For a commerce or humanities student, this matters because health is the foundation of everything else. No amount of business acumen or historical knowledge helps if you are too tired or sick to use it. These guidelines are also a real-world example of how international organisations use research to shape public policy — something you will encounter in economics, political science, and sociology.

What does "moderate-intensity" mean in plain language? It means you are breathing harder than usual, your heart is beating faster, and you can still talk but cannot sing. Brisk walking, cycling on flat ground, or doubles tennis all count. "Vigorous-intensity" means you are breathing very hard and can only say a few words before needing a breath — think running, swimming laps, or singles tennis.

The guidelines also recommend muscle-strengthening activities on at least two days per week. This includes exercises like push-ups, squats, lifting weights, or even heavy gardening. Strong muscles protect your joints, improve your posture, and keep your metabolism running efficiently as you age.

For children and adolescents (ages 5–17), the recommendation is higher: at least 60 minutes of moderate-to-vigorous physical activity daily. Most of this should be aerobic, and vigorous activities should be included at least three times per week. This is because young bodies are growing bones, building coordination, and developing lifelong habits. …