Can a bike computer accurately track heart rate and cadence without the need for additional sensors or peripherals, or is it necessary to invest in separate heart rate and cadence sensors to get reliable data? Are there any bike computers that can provide accurate heart rate and cadence tracking without additional hardware, and if so, whats the difference in data quality compared to using separate sensors? Should cyclists prioritize bike computers with built-in heart rate and cadence tracking, or is it better to opt for separate sensors for more accurate data? Can bike computers accurately track heart rate and cadence for high-intensity interval training, endurance riding, or sprinting, or do separate sensors provide more reliable data in these situations? What are the limitations of using a bike computer to track heart rate and cadence, and are there any workarounds to overcome these limitations?