The guide

Machines or free weights

Both work. What each is good at for a beginner, how to choose, and what to do when the machine you want is taken.

4 min read · Updated 20 October 2026

Gyms have two main kinds of strength equipment: machines and free weights. Which is better? For someone starting out, studies find both build strength about as well, so you can pick whichever suits you.

What each one is

Most machines guide the weight along a fixed path. You sit or stand in one and push or pull a handle, pad or footplate. On many, you choose the weight by moving a pin in a stack of weights.

Free weights are weights you hold and steer yourself, with nothing guiding them. Most often that means:

Dumbbells: a weight you hold in one hand, often one in each hand.
Barbells: a long bar you hold with both hands.

A rep is one complete lift of the weight. A set is a group of reps done without resting.

What the research says

A 2023 review of 13 studies, with 1,016 adults, found both built strength about equally, whether each group was tested on its own kind of equipment or on a test that favored neither. People who trained with free weights did better on free-weight lifts, and machine users tended to do a little better on machines, though that difference was too small to be sure of. You get better at what you practice.
In that review, beginners also gained about the same on both. The authors suggest machines may still suit beginners a little better at first, because they ask less of your balance.
The same review found no difference in muscle growth, though only a handful of studies measured it.
The American College of Sports Medicine (ACSM), in its 2026 guidance, found equipment type didn't change strength gains.
Elastic bands, bodyweight exercises such as push-ups, and training at home work too.

Machines: pros and cons

The first point is from the 2023 review; the second is a practical point, not a research finding.

Good: less skill needed. The path is set for you, so there's less to learn.
Harder: each one needs adjusting. Before you start, set the seat height, any pads and the weight to fit you. If you're not sure how, ask staff.

Free weights: pros and cons

Good: practice for dumbbell and barbell lifts. If those are the exercises you want to do, training with free weights helps most with them.
Harder: more skill needed. You balance and steer the weight yourself.
Harder: they can be dropped. Set them down with control (see below).

Is one safer?

ACSM's 2026 guidance calls strength training safe for healthy adults, and notes that in trials, it didn't raise the risk of serious harms. Studies of competitive lifters suggest weight-training sports have relatively low injury rates compared with common team sports.

In US emergency rooms from 1990 to 2007, about 9 in 10 weight-training injuries involved free weights, and about 2 in 3 came from a weight dropping on the person. But the study counted emergency room visits; it didn't measure how much time people spent with each kind. The 2023 review found it uncertain whether machines and free weights differ in risk.

With either kind:

Pick a weight you could still lift about 2 or 3 more times when your reps are done. ACSM suggests stopping there, and found that going until you can't do another rep gave no extra gain.
Set weights down; don't let them fall.
Give people room: don't stand or start an exercise right behind someone who is lifting.

Check with a doctor before you start if you have a health condition, are pregnant, or haven't exercised in a long time. Otherwise, if you're healthy and build up gradually, US guidelines say you generally don't need to. Stop if you feel pain or unwell, and see a doctor about new symptoms such as chest pain or dizziness.

How to choose

These are suggestions, not rules:

For the simplest start: machines. With the path set, you can think about the weight and the reps.
To learn free-weight exercises: start light and build up slowly.
In a small gym or at home: free weights, bands and bodyweight exercises.
Or both. You don't have to pick one for good, and you can change the mix as you learn.

When the machine you want is taken

Check if it's in use. A towel or water bottle on a machine usually means someone is using it. If you're not sure, ask.
Ask to work in. Wait until the person finishes a set, then ask if you can "work in": take turns on the machine while each of you rests between sets. Something like "Mind if I work in?" is enough.
Or do something else, then come back. You could do the next exercise on your list, or another one for the same muscles.
Ask staff if you're not sure what else to use, or how to use it.

When it's busy, if you rest more than a couple of minutes on a machine, offer to share it. When you're done, wipe the seat and handles, put weights back where they belong, and take off any plates (the loose weights you add to a bar or machine).

In the app

Train Personal's ready-made plans are fitted to a full gym, a basic gym or home, and in the app's My gym you list what your gym has, so plans use only that. If you're not sure what a machine is, take a photo of it and AI names it (this needs a signal). Each of the app's 335 exercises has a how-to in plain words. If a machine is taken, Swap gives you another exercise for the same muscles, for today only.