Health and Diet
Coffee and tea contain tannic acid, a substance that can decrease the iron that your body absorbs from certain foods. Scientific research studies indicate that a cup of tea with a meal may decrease iron absorption by 64% and a cup of coffee within one hour of a meal may decrease iron absorption by 39%. Consuming coffee one hour before the meal does not decrease iron absorption.

Fitness
If you really want to see how effective your workouts are use a heart rate monitor. Over time, you’ll see your heart rate decreasing with the same workload. This means your body is becoming more efficient. Watch yourself go from frumpy to fit before your vary eyes.