The Truth About Exercise — What Science Actually Says You Need

The fitness industry has a vested interest in making exercise seem complicated. Complicated means you need more products, more programmes, more expert guidance. The truth, as the science consistently shows, is far simpler — and far more accessible.

What the Research Actually Says

The World Health Organisation recommends at least 150 to 300 minutes of moderate intensity aerobic activity per week, or 75 to 150 minutes of vigorous intensity activity. Plus muscle strengthening activities on two or more days per week.

That is it. That is the science backed minimum for meaningful health benefits. Twenty to forty minutes of brisk walking, five days a week. Two sessions of bodyweight exercises or resistance training. Nothing exotic, nothing expensive, nothing requiring a gym membership.

The gap between this minimum and what most people actually do is enormous. And the gap between this minimum and what the fitness industry implies you need is even larger.

Cardio vs Strength Training

One of the most common debates in fitness is whether to prioritise cardio or strength training. The honest answer is that both matter — and for different reasons.

Cardiovascular exercise strengthens your heart and lungs, improves insulin sensitivity, reduces inflammation, and has profound effects on mental health. Regular aerobic exercise is one of the most powerful antidepressants available — with none of the side effects.

Strength training preserves and builds muscle mass, which becomes increasingly important as you age. After thirty, most people lose three to five percent of muscle mass per decade without resistance training. Muscle is metabolically active tissue — more muscle means a higher resting metabolism and better blood sugar regulation.

The optimal approach combines both. But if you can only do one, research suggests strength training may have a slight edge for overall health outcomes, particularly as you get older.

The Role of Non Exercise Activity

Here is something the fitness industry rarely talks about — the health impact of how you move throughout your entire day, not just during your workout.

Studies show that sitting for extended periods is independently harmful, even if you exercise regularly. The person who sits for eight hours and then exercises for an hour has significantly worse health outcomes than the person who moves regularly throughout the day.

This is why non exercise activity thermogenesis — NEAT — matters so much. Taking stairs instead of lifts. Walking during phone calls. Standing while working. These small movements add up to thousands of calories and significant health benefits over time.

Starting When You Have Not Moved in Years

The hardest part of exercise is starting — especially after a long period of inactivity. The key is to begin far more modestly than you think necessary.

Ten minutes of walking is not embarrassing. It is a beginning. And beginnings, compounded over time, become transformations.