Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to create a bicep workout [title] Stretch and warm up. [step] To prepare for a major work out and prevent injury it is important to warm up and stretch. For a warm up you should do one set of approximately 15 reps at half of your maximum capacity.

Ending1: Working out too much can result in injuries or even high falls. Including a stretching session for a long time before working out to help prevent fractures or dislocations can increase your body's overall strength. Ending2: [substeps] To stretch your biceps, lift your arms out to your sides at shoulder height. Open the palms up towards the sky and continue turning the palms backwards. Ending3: Then, do five more sets with 15 minute breaks in between. All exercises will stimulate your muscles and will help tone them up. Ending4: Then you can perform the rest of the exercise to completion. [substeps] Stretch and warm up your muscles very well and evenly.

Answer format: ending1/ending2/ending3/ending4