Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to build forearm muscles [title] Get or make a wrist roller. [step] This is simply a bar or rod with a rope tied around its midpoint. The other end of the rope is attached to a weight.

Ending1: Once you get it, you move it onto your wrist. [substeps] The bar should be at least 3 inches (7.6 cm) above your wrist. Ending2: If you have a relatively small wrist, you might want to purchase one with a metal grip and a jump bar. Spend a little extra on a cheap wrist roller, which is an easy way to build muscle without doing exercises regularly. Ending3: [substeps] To do this, you roll a 10-foot weight over the top of the bar and one end onto the cable. Next, curl a foot and then wrap it around the rope and slowly drop the weight. Ending4: This simple piece of equipment is one of the most effective ways to build forearm muscle and train grip strength. [title] Start with a very light weight, and increase the weight gradually.

Answer format: ending1/ending2/ending3/ending4