THREE FACTORS DETERMINE WHETHER YOU WILL GAIN BIGGER MUSCLES: GENETICS, GENDER AND TRAINING INTENSITY.
GENETICS: PEOPLE WITH MORE FAST-TWITCH FIBreS ACQUIRE LARGER MUSCLES MORE EASILY THAN PEOPLE WITH MORE SLOW-TWITCH FIBreS. THINK ELITE SPRINTER VS. ELITE LONG DISTANCE RUNNER.
GENDER: men have higher TESTOSTERONE levels resulting in greater muscle gains.
TRAINING INTENSITY: THE HARDER AND HEAVIER YOU TRAIN, THE MORE MUSCLE YOU WILL GAIN.
