Measuring the Parameters of Maximum Muscle Strength, Muscle Mass, Muscle Damage in Active Adult Males after Low–Load High–Repetition with High–Load Low–Repetition Resistance Training

Lifting lighter weights many times until you can't do any more builds as much muscle as lifting heavy weights a few times in people who already exercise regularly.

Lifting weights with just a few heavy reps or many lighter reps gives about the same muscle growth when you do the same total work.

Lifting heavy weights fewer times, three days a week for a month, helps young active men build more muscle and get stronger than lifting lighter weights many times.

In young adult men, lifting heavy weights for fewer repetitions leads to slightly greater increases in strength and muscle size over four weeks compared to lifting lighter weights for more repetitions.

In young adult men, performing resistance exercises with lighter weights and more repetitions for four weeks is linked to lower levels of a blood marker indicating muscle damage, compared to using heavier weights with fewer repetitions, even though both methods may lead to similar muscle growth.

In young adult men who engage in resistance training, changes in creatine kinase levels occur after four weeks of either heavy lifting with few repetitions or lighter lifting with many repetitions, suggesting the biomarker is sensitive to different training styles.