Final answer:
The most important reason for a first-time exerciser to start with slower, more controlled movements is to prevent injuries. These movements help prepare the muscles and tendons for exercise, thereby reducing the likelihood of injury.
Step-by-step explanation:
With a first-time exerciser, the most important reason for starting with slower, more controlled movements is b) Preventing injuries. When a person begins a new exercise routine, their muscles and tendons are more prone to injuries due to lack of conditioning. A warm up is crucial as it is a slow increase in the intensity of physical activity that prepares muscles for more strenuous activity. It increases blood flow to the muscles, raises the heart rate, and consequently, warmed-up muscles and tendons are less likely to get injured. Moreover, starting with slower exercises helps in adapting to proper form and technique, which is essential for preventing injuries.
It is important to note that while other aspects such as building endurance, increasing heart rate, and achieving maximum strength are also goals of exercise, they are not the primary consideration for a beginner. Instead, these goals are progressively achieved as the exerciser becomes more adept and conditioned over time.
Aerobic exercises, such as cycling and walking, and flexibility exercises, such as stretching, both serve to improve different aspects of physical fitness. They increase muscular endurance and improve the range of motion of muscles and joints, respectively, contributing to a lower risk of injury.