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8. Heart Rate Monitors Are Useful for Undertaking Safe and Effective Work-Outs
Some fitness trackers include heart rate monitors, which are great for pregnant women and people with heart disease who are advised not to increase their heart rate above a particular level.
They are also good for improving aerobic exercise and endurance. For an optimal aerobic workout, aim to exercise with a heart rate at 60 – 80 percent of your maximum heart rate for 30 minutes three to five times per week.
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