A miscarriage can be a common cause of brown to black vaginal bleeding. Not all the women realize that they are pregnant until there is an abnormally heavy bleed particularly consisting of large clots or the color varying from the normal period blood.
Boost Your Metabolism in 15 Minutes 4 Moves to Rev Your Metabolism Kick calorie burning into overdrive with this quick full-body workout Read more: Exercises that Boost Your Metabolism - How to Boost Your Metabolism - Woman's Day.
1 Sprinting isn't the primary method for muscle growth, but like all speed work, it can quickly get you bigger. 2  A few sprint workouts during mass phases can greatly reduce bodyfat accumulation and also increase insulin sensitivity so you get even leaner in the process. â Speed Work Prevents Fat Gain. Speed training creates a huge metabolic disturbance and is one of the best methods for losing or maintaining fat stores. According to the many DEXA scans I've run on athletes and clients, body fat stores rapidly decrease and muscle size increases once sprinting is employed.