GNC has been the leader in helping American’s live well for more than 75 years. We've all heard of the story about the tortes and the hair. Slow and steady wins the race. while running slow and steady may not help you win on race day, training with that mentality might. Your body burns a lot when you log many miles in a week. The problem is, if your heart rate is too high on your long training days, your body burns to your muscles and creates soreness that could effect your other training days. that's where the GNC race trainer pro heart rate monitor watch can help. It measures your heart rate and calories burned as you exercise so you can stay in the right heart rate and reduce muscle soreness. Your pace will naturally get faster under the same heart rate as you build your endurance. The finger touch operation is easy-to-use so you can be changing settings as you stride. Unlike most heart rate monitors, no chest strap is required for this one so you don't feel like your breathing is restricted. Includes cr-2025 battery and a bonus fitness guide.