Lifting weights until the body’s muscles fatigue is a good way to make your muscles look bigger. For this, use a low weight with many repetitions, lift until fatigue, take a short rest, and repeat. If you want more strength than size, use heavier weights with less repetitions. If you want to achieve strength and size both, utilize eccentric flexion. This is the lowering portion of exercises: lowering after a pull-up or lowering the barbell to your chest in bench press. Make these movements slow for muscle conditioning that benefits both strength and size.
Read more: Should You Be Lifting to Failure?