Different types of exercises target various muscle groups. For instance, strength training focuses on building muscle by using resistance, engaging muscles like the quadriceps, hamstrings, and glutes. Conversely, cardiovascular exercises, such as running or cycling, primarily engage the heart and lungs and utilize large muscle groups for sustained aerobic efforts. Flexibility exercises, like yoga or stretching, focus on lengthening and improving the mobility of muscles and joints. Incorporating a balanced mix of all exercise types is essential for comprehensive strength, endurance, and flexibility.