Climbing and bouldering demand upper-body strength, but don't forget about your lower limbs. Improve your endurance so that your muscles don't tire out too quickly and you can climb constantly on longer routes and for longer periods of time. Weight training will help increase your muscle mass, which will improve your balance, coordination, and self-confidence as you climb more often. Strong legs are essential for avoiding injury when climbing over rough surfaces or terrain features such as rocks, trees, and cliffs. Upper body strength is also necessary to protect yourself from injury at the hands of other climbers. For example, if someone tries to pull you off a route or push you over, you'll be able to defend yourself. Training your arms and chest will make these situations safer for you and others around you. Many climbers spend years developing their upper bodies in order to scale tall towers or reach difficult-to-reach areas on large formations. Although lower limbs are also important, without strong arms and shoulders, these efforts would be in vain. In conclusion, upper body strength is necessary for climbing to be safe and for reaching places no one else has before. Without it, you're putting yourself in danger due to lack of knowledge or experience.