Start with 1–3 light warmup sets, using a weight you can easily do for the prescribed number of reps. Increase the weight on each set until you find a weight where the prescribed amount of reps is very difficult.
Can also use a barbell or dumbbells. Start with 1–3 light warmup sets, using a weight you can easily do for the prescribed number of reps. Increase the weight on each set until you find a weight where the prescribed amount of reps is very difficult.