"I need to stretch more." "I need to get stronger." "I need mobility work." These terms are used interchangeably, but they mean different things, and they need different types of exercise.
Strength
What it is: your muscles' ability to produce force.
Why it matters: strength supports joints, absorbs load, prevents injuries, and makes daily tasks like climbing stairs, lifting shopping and getting up from the floor easier.
How to train it: exercises against resistance (body weight, bands, weights) that challenge your muscles, usually 2 to 3 times a week, progressively increasing difficulty.
Examples: squats, step-ups, push-ups, bridges, rows.
Flexibility
What it is: how far a muscle can lengthen, often measured passively (for example, how far someone else can move your leg).
Why it matters: enough flexibility allows comfortable movement and certain positions (sitting cross-legged, reaching overhead).
How to train it: static stretches held for around 20 to 30 seconds, repeated regularly.
Examples: hamstring stretch, calf stretch, chest stretch.
Mobility
What it is: how well you can actively move a joint through its range, under your own control. It combines flexibility, joint movement and strength.
Why it matters: having flexibility is not enough if you can't control the movement. Mobility is what you actually use in daily life and sport.
How to train it: controlled, active movements through the full range.
Examples: controlled hip circles, deep squat holds, thoracic rotations, active leg swings.
Which do you need?
- Feeling weak, unstable or tiring easily? Prioritise strength.
- Muscles feel tight and limit specific positions? Add flexibility work.
- Struggling to move a joint fully under control, or stiff in daily movement? Work on mobility.
Most people benefit from a mix. But a very common pattern is people stretching regularly when what they actually need is more strength.
"Tightness" isn't always tightness
Muscles can feel tight because they're weak, tired or protecting a sensitive area. Stretching may give short-term relief, but strengthening is sometimes what makes the tightness go away for good.
Getting the balance right
A physiotherapist can assess your strength, flexibility and mobility, and identify which is actually limiting you.
This article is general advice and can't diagnose you. A physio can examine you and tell you what's right for your body, so message or call us if you're unsure.
Talk to a physio about this
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