Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to prevent boredom in your fitness routine [title] Add weight or repetitions. [step] If you're starting to get bored with your strength-training routine, it may be that your fitness level has increased. As a result, the exercises are no longer challenging for you.

Ending1: Instead, you should start making changes to your exercise routines to help improve your strength. Slowly and gradually add weight or repetitions if your weight starts to hurt you, increase the intensity and the repetitions. Ending2: [substeps] Keep in mind that exercise releases endorphins that make you feel good and make exercise rewarding. If you're no longer working your muscles to the same level, those endorphins aren't being released and you'll no longer enjoy your fitness routine. Ending3: To start, increase your strength-training routine to be greater in strength. [substeps] Like any exercise routine, choose exercises that target your biceps, triceps, and pectorals. Ending4: In order to help prevent boredom, consider adding weight or repetitions to find the appropriate intensity for your workout regimen. [substeps] You can try adding in endurance or resistance exercises, in which body weight increases per minute while you exercise.

Answer format: ending1/ending2/ending3/ending4