To get shredded like a bodybuilder, put your training on hold: isometric exercises can make the blood vessels feeding your muscles stand out, according to a British study.

Men who did isometric exercises (here’s The Ultimate Isometric Workout), which involve performing part of an exercise without movement – like holding the midway point of a biceps curl – increased the size of their arteries by 11%. What’s more, their blood pressure dropped.

The researchers think the exercises increased the nitric oxide in the participants’ blood. Do four sets of two-minute holds three times a week for eight weeks.