The Marathon method is a high rep set which will get your muscles screaming.
This is an ascending ladder set which usually goes from 1 rep, to 15 reps.
I recommend using a weight which you’d normally expect to get 15 good reps with (trust me, don’t go too heavy!). Perform 1 rep then hold the weights at the start position for a 1-count, then perform 2 reps, then hold the start position for a 2-count. We continue climbing the ladder like this (3 reps, then a 3-count hold, etc) until we hit a 15 rep round or failure.
Here’s a demo: