How to choose a starting weight

Technique first, weight second

With a new movement the first goal is not to lift a load but to learn to perform it well. In the early weeks the nervous system is learning the coordination of the movement; heavy loads disrupt that learning and raise the risk. That is why body weight alone, an empty bar or the lightest dumbbell is a suitable start for the first sessions of a new exercise. Adding resistance before technique settles means reinforcing a faulty pattern under load.

A practical method: approach from below

To find the right load, work in this order: with a light resistance you are certain you can handle, complete your target reps. If it feels very easy, add a small increment on the next set (one step on the dumbbell rack, 2.5–5 kg on a bar) and try again. When you reach the point where you think “I could have done 2–3 more”, you have found your starting weight. That margin is known as reps in reserve, or RIR, and is explained in detail in the RPE and RIR guide. Approaching from below costs you a few light sets; approaching from above costs you broken technique and possible strain.

What to expect on different exercises

Starting loads vary enormously between exercises, and that is normal. Leg movements (squat, leg press) usually allow much higher resistance, while shoulder and arm movements need far lighter loads; a 2–4 kg dumbbell is a realistic start on lateral raises for many beginners. On machines, setting the seat and then starting at the lightest setting and working up is a practical route; for the machine and free weight distinction, see the related guide. What someone else lifts is not a measure for your own starting point.

Feeling “light” in the first weeks is normal

The natural consequence of a cautious start is that the first week or two feel easy; this is not a loss. During this period the body learns the movements, joints and connective tissue adapt to load, and you build the habit of keeping records and judging effort. When it is time to add resistance, do it one variable at a time and in small steps: first push the reps above the top of your target range, then raise the resistance one step and let the reps drop. The full cycle is described in the progressive overload guide.

Starting at home: choosing bands and dumbbells

The same principles apply to home equipment; only the tools differ. Resistance bands are sold in graded colours, and for beginners one light and one medium band is usually enough as a starting set; because a band's resistance rises as it stretches, you can fine-tune the difficulty with the same band by changing your grip distance. The most common mistake when buying dumbbells is buying a single pair at one middling weight, when different movements call for very different loads. Shoulder and arm work needs light options (2–5 kg), while leg and back work needs heavier ones; adjustable dumbbells, or two pairs at different weights, are more useful than a single pair. Water-filled bottles and a rucksack loaded with books are also legitimate starting resistances. Whatever the tool, the rule does not change: the load you can finish your target reps with, using good technique and 2–3 reps still in reserve, is your correct starting point. For equipment-free options, see the home programme guide.

Safety limits

Whatever load you are using, these rules hold: if you feel a sharp or stabbing pain during a set, stop before finishing it; do not extend a set once technique starts to break down; do not strain while holding your breath completely. For demanding attempts with free weights, safety pins or a spotter should be in place. In cases such as cardiovascular disease, uncontrolled blood pressure, pregnancy or recent surgery, medical clearance is needed before starting strength training; if you have an ongoing joint problem, choosing your loads with a physiotherapist is the safest route.

Frequently asked questions

This guide draws on the resistance training principles of the American College of Sports Medicine (ACSM) and on the general findings of the literature on effort-based load selection.