How to Know You Got a Good Workout

1. What does your heart rate tell you? Wearing a heart rate monitor can be effective for cardio. Your heart rate should reach three-quarters of its maximum for an effective cardio session (I recommend HIIT for an even more effective cardio session and a longer after-burn). And how do you work this out? Your maximum heart rate is 220 minus your age. Once you have your maximum heart rate, multiply by .75. Aim for this as your best measure of cardiovascular fitness. 2. How quick