“How much exercise do I need each week?” is one of those questions with a reassuringly specific answer — and then a much more useful unofficial one. The official guidance is clear. The unofficial answer is: less than you think, and more consistently than you’re probably doing it. Let me break down both.

How Much Exercise do I Need Each Week — The official numbers

The NHS physical activity guidelines for adults aged 19 to 64 recommend:

• At least 150 minutes of moderate-intensity activity per week — brisk walking, cycling, dancing, pushing a lawnmower — or 75 minutes of vigorous activity like running or singles tennis, or a mix of both.
• Strength activities on at least 2 days a week — working all major muscle groups. That means bodyweight exercises, resistance bands, weights, heavy gardening, or yoga.
• Reduce time spent sitting. Break up long periods of sitting with at least light activity.

These match the World Health Organization’s global recommendations, so it’s not just a British quirk — this is the international consensus. 150 minutes sounds like a lot until you realise it’s 22 minutes a day, or five 30-minute sessions. A brisk walk to the station and back most days gets you most of the way there.

What counts as “moderate”?

This is where people trip up. Moderate intensity means you’re breathing faster, your heart’s beating faster, and you feel warmer — but you can still hold a conversation. Brisk walking (not ambling, not power-walking), casual cycling on flat ground, doubles tennis, ballroom dancing. Vigorous means you can’t say more than a few words without pausing for breath — running, fast cycling uphill, aerobics classes, football.

Here’s a trick I wish someone had told me years ago: the “talk test” is genuinely all you need. If you can sing, you’re going too easy. If you can only gasp single words, you’re in vigorous territory. Everything in between is your moderate zone.

The unofficial answer: consistency beats intensity

The guidelines are the gold standard, but the research keeps saying something encouraging: the biggest health gains come from going from nothing to something. Someone who does 60 minutes a week gets a disproportionate share of the benefit compared to someone doing zero. The curve flattens after that — going from 150 to 300 minutes helps, but not nearly as dramatically as going from 0 to 60.

So if 150 minutes feels impossible right now, forget it. Start with two 20-minute walks a week. Build the habit, then build the minutes. A modest routine you actually do beats a heroic one you abandon by February.

Don’t forget the strength bit

The cardio gets all the attention, but the twice-weekly strength work matters enormously — especially as you age. Muscle mass declines from your thirties, and strength training is the brake pedal. It protects your joints, your bones, your balance and your metabolism.

You don’t need a gym. Press-ups (on your knees to start), squats, lunges, planks, and a resistance band that costs less than a takeaway will cover everything. If weights intimidate you, you can get genuinely fit without ever setting foot in a gym. And if your joints complain, low-impact exercise options like swimming and cycling give you the cardio without the pounding.

Fitting it into a real week

Here’s what a realistic week could look like for someone starting out:

• Monday: 25-minute brisk walk at lunch
• Tuesday: 15 minutes of bodyweight exercises at home (squats, press-ups, plank)
• Wednesday: rest, or a gentle stroll
• Thursday: 25-minute brisk walk, different route
• Friday: 15 minutes bodyweight exercises
• Weekend: one longer walk, a swim, or a bike ride — whatever you actually enjoy

That’s roughly 90 minutes of moderate activity plus two strength sessions. Not the full 150 yet, but a genuinely solid foundation — and one most busy people can sustain.

One more thing: sitting is the silent partner

You can hit 150 minutes and still spend 10 hours a day in a chair, and the sitting carries its own risks. If you work at a desk, set a timer to stand and move for two minutes every half hour. Walk to a colleague instead of messaging. Take calls standing. These micro-movements add up more than you’d expect — and your back will thank you too.

The 10,000-step question

No exercise discussion is complete without addressing the 10,000-step mantra. Here’s the truth: it was invented by a Japanese pedometer marketing campaign in the 1960s (the name was a pun — 10,000 steps in Japanese resembles the character for “walk”). It wasn’t based on science. But — and this is the interesting part — subsequent research has roughly validated it anyway.

Large studies tracking step counts and mortality find that benefits climb steeply up to about 7,000–8,000 steps a day, then level off. Going from 3,000 to 7,000 steps is associated with dramatically lower mortality risk; going from 7,000 to 12,000 adds only modest further benefit. So 10,000 isn’t magic, but it’s a reasonable round-number target in the right ballpark — and crucially, it’s achievable for most people with a bit of intention.

What does 10,000 steps look like in practice? For most adults it’s roughly 7–8km, or about 90 minutes of total walking spread across the day. That sounds like a lot until you break it down: a 20-minute walk to the station (2,500 steps), moving around the office (2,000), a 30-minute lunch walk (3,500), and evening pottering (2,000). Suddenly you’re there without a dedicated “exercise session.” This is why step targets work psychologically — they turn exercise into background activity rather than a scheduled event.

Pace matters though. Ambling steps count for general movement, but the moderate-intensity minutes in the guidelines need brisk walking — the kind where you’re slightly breathless. A useful approach: aim for 7,000–8,000 total steps daily, with at least 20–30 minutes of it brisk. Track with your phone (most count steps automatically now) for a week to find your baseline — most desk workers are shocked to discover they’re at 3,000–4,000. Then add 1,000 steps a week until you hit your target. Gradual beats heroic; the person who builds to 8,000 steps and sustains it beats the person who does 15,000 for a fortnight and quits.

One caveat: steps don’t capture everything. Swimming, cycling and strength work don’t register well on pedometers but absolutely count towards the guidelines. Use steps as one metric among several, not the whole story — and if walking bores you, the activity you enjoy enough to sustain will always beat the optimal one you abandon.

The practical takeaway

Aim for 150 minutes of moderate activity plus two strength sessions a week — but if that’s too much right now, start smaller and build. The best exercise routine is the one you’ll still be doing in six months, not the one that impresses anyone. Walk briskly, lift something heavy-ish twice a week, sit less. That’s the whole programme.