You lift the weight, and your arms get bigger. It’s not rocket science, is it?
But how exactly does it work.
Conducting exercise creates what is known as ‘hypertrophy’ in the body. When you responsibly push yourself in a session, your muscle fibres rear and reform to create new protein strands. These strands are then thicker and greater in number to what they were before.
This is triggered by ‘overloading’ your muscles within an exercise regime; most commonly through additional reps and sets or adding extra weight to a lift. This activates your chosen muscle group and allows you to tailor your session plan for specific benefits.
This can allow you to develop your strength, endurance, power, or achieve whatever goals your sport or regimen requires.