In
weightlifting, interval training refers to how many
reps and how much weight is used in each
set. As an example, a
weightlifter doing a
set of
barbell curls might start with a
set of 12
barbell curls at 20 pounds (a
warm up set), followed by a
set of 8
barbell curls at 40 pounds, followed by a
set of 6
barbell curls at 50 pounds.
The idea behind this method is that varying the
low intensity high repetition exercise with the
high intensity low repetition exercise will
stress different
fibers in the muscle, leading to more
growth.