Heart Rate Monitors

Chest straps use electrical signals (ECG) and are generally more accurate for high-intensity or interval training; optical wrist monitors use LED sensors (PPG), are more convenient for all-day wear, and work well for steady-state cardio but can be less accurate during sudden, intense efforts

Look for Bluetooth and/or ANT+ support — Bluetooth is common for smartphones and most apps, while ANT+ is useful for connecting to bike computers, treadmills, and some gym equipment; dual-protocol devices offer the most compatibility

Prices vary widely; basic optical wrist monitors and budget chest straps can be found under $50, reliable midrange units typically cost $50–$150, and advanced multisport devices or clinical-grade monitors can exceed that range, with averages in this category around $90

Key factors are sensor type (ECG vs PPG), sampling rate or transmission latency, how the device reports smoothed vs real-time data, and whether it provides metrics like HRV, zones, or cadence; independent lab tests or user-consensus on accuracy are helpful indicators

Battery life depends on type: optical wrist units commonly need recharging every 7–20 hours of active use, rechargeable chest straps typically last 100+ hours per charge, and replaceable-coin-cell chest straps can last several months to a year depending on usage

Many models offer water resistance and some are rated for swimming, but capabilities differ — check the IP or ATM rating and manufacturer notes; note that optical sensors may be less reliable underwater, while dedicated waterproof chest straps and swim-specific sensors provide better performance

Rinse and air-dry straps after sweaty or saltwater use, replace worn elastic or contact pads, avoid prolonged exposure to extremes of heat or moisture, keep firmware updated, and follow manufacturer guidance for charging and battery replacement to maintain accuracy and longevity