What the WHO numbers mean for your week
The World Health Organization's 2020 guidelines describe aerobic activity as rhythmic, sustained work by the body's large muscles, and say it improves cardiorespiratory fitness: the fitness of your heart and lungs. Walking, running and cycling are among the examples given. For adults aged 18 to 64, the guidelines advise 150 to 300 minutes of moderate-intensity aerobic activity a week, or 75 to 150 minutes of vigorous-intensity activity, or an equivalent combination.
Two further lines matter if you are starting low. Doing some physical activity is better than doing none, and adults should start small, then build up how often, how hard and how long they train. Effort is personal too: WHO puts moderate activity at about 5 or 6 on a 0 to 10 scale of your own capacity, and vigorous activity at about 7 or 8. RPM's cardio row is one place to put those minutes in.
Treadmill, cross-trainer or bike: who each one suits
All of these count as aerobic activity when you keep the effort up. The right one is the machine that suits your body and your goal, because that is the one you keep using.
| Machine | Suits you if | Think twice if | Judging effort | Making it harder over time |
|---|---|---|---|---|
| Treadmill, walking | You are starting from little or no exercise, or want something you already know how to do | Long steady sessions bore you quickly | Brisk enough that talking takes effort, though you can still speak | Longer walks first, then more incline |
| Treadmill, running | You run outdoors in winter or have a race in the cooler months | Running has given you joint pain before, in which case ask a doctor or physiotherapist first | Pace and the 0 to 10 scale together | Add running spells to a walk, then lengthen them |
| Cross-trainer | You want long sessions with less pounding, or like working arms and legs together | You want gym work to carry straight over to outdoor running | Steady breathing you can hold for the whole session | Raise the resistance a step at a time |
| Upright bike | Your knees or hips prefer less impact, or you like to read or watch while you ride | Your saddle never feels right, so ask for help with the setup | Leg burn and breathing, held steady | More resistance, then longer rides |
| Spin bike | You like intervals, or a class is what keeps you turning up | Classes take the bikes at the hour you train | Hard efforts at 7 or 8 with easy spinning between | More rounds or shorter recoveries |
| A mix of two | You train four or more days and want to spread the load | Switching machines becomes an excuse to stop | The same scale on every machine | One longer session a week on your favourite |
If you have a heart condition, high blood pressure or another medical condition, check with your doctor before starting or stepping up cardio.
Why the heat changes the plan
From May to September, outdoor running and cycling in Abu Dhabi squeeze into the hour before sunrise, and coastal humidity can make even that hard going. Plenty of winter walkers and runners simply stop for the summer. Moving the same sessions indoors keeps your weekly total steady whatever the forecast says.
Indoors still asks for some care. You arrive warm from a parked car, so drink water first, start easy and keep a bottle on the machine.
A starter week that reaches 150 minutes
An example for someone on office hours who is new to regular cardio. Build up to it over a few weeks rather than starting here on day one.
| Day | Session | Time | Effort out of 10 |
|---|---|---|---|
| Saturday | Treadmill: brisk walking with a little incline | 40 minutes | 5 to 6 |
| Sunday | Rest, or an easy stroll round a mall | Your call | Easy |
| Monday | Upright bike after work | 30 minutes | 5 to 6 |
| Tuesday | Rest, or strength work if you lift | Your call | Varies |
| Wednesday | Cross-trainer | 30 minutes | 5 to 6 |
| Thursday | Rest | None | None |
| Friday | Treadmill or bike, fitted around the shorter Friday hours | 50 minutes | 5 to 6 |
Once that feels routine, swap part of one session for harder intervals on a spin bike. In WHO's guidance, 75 to 150 vigorous minutes stand in for the 150 to 300 moderate ones, so harder sessions can be shorter. The same guidelines also advise muscle-strengthening activities on two or more days a week, and the cardio and weights guide shows how to fit both into one membership.
Checks for a cardio-first gym
- How many treadmills, cross-trainers and bikes are available after office hours, when most gyms are at their busiest?
- Do the treadmills have enough incline for walking workouts?
- Is there somewhere on each machine for a phone and a bottle?
- Do classes book out the spin bikes at your usual hour?
- Is the air cool and moving, or stale by late evening?
- If you want a women-only space, does that space have cardio machines of its own?
Count how often you would wait. A short wait once a week is fine. Waiting on every visit is how cardio quietly drops out of a routine.
RPM's cardio row against these checks
RPM is one club on Level 4 of AD HUB Sports Complex in Al Manhal, with free on-site parking and a lift up to the club. The cardio photos show treadmills, cross-trainers and an upright bike facing tall windows, and spin bikes sit in the functional area. The women-only Ladies section has its own cardio equipment, so a woman could run the whole starter week there.
- Fits well: walkers, winter runners keeping fit through summer, and anyone wanting bike or cross-trainer sessions under one roof with weights.
- Ask first: whether rowers or stair climbers are available, and when spin classes use the bikes.
- Check: which sections your tier covers, since Floor, Engine and Atelier inclusions are confirmed on enquiry.
- Not a fit: swimming or track running, because neither is among RPM's published facilities.
Opening runs from early morning to late evening, with shorter Friday hours. Book a free guided tour at the hour you would train and look at the cardio row while it is busy.
| Days | Opening hours |
|---|---|
| Saturday to Thursday | 06:00–23:00 |
| Friday | 09:00–22:00 |
Hours can change, for example during Ramadan. Confirm with the team before a late or early visit.
Sources
Questions, answered.
Does brisk walking count towards the weekly target?
Yes. WHO lists walking among aerobic activities, and brisk walking at a moderate effort counts towards the 150 to 300 minutes. Adding incline raises the effort without any running.
Is the bike as good as running?
For aerobic fitness, both count when the effort is right. Running adds impact, which some people enjoy and some joints dislike. Choose the one you will keep doing, and mix them if you like both.
What heart rate should I aim for?
Formulas that estimate maximum heart rate vary a lot between individuals, so use any number only as a rough guide. The 0 to 10 effort scale works on every machine and needs no watch. If you take heart medication, ask your doctor how to judge effort.
How do I know my fitness is improving?
Repeat one test session every few weeks on the same machine, for the same time, at the same setting. If it feels easier, or you cover more distance at the same effort, your fitness is moving. Write the results down.
When are the cardio machines least busy?
Weekday mid-mornings and early afternoons tend to be quieter than the hours after work. See when gyms are least busy.