Warning: The energy drinks that get you to the gym when you’re dragging may be dangerous pick-me-ups for your ticker. The beverages, which are high in caffeine, sugar and taurine, significantly increase the heart’s contraction rate for an hour after consumption, a German study found. Fuel up with 6 ounces of chocolate milk instead, suggests FITNESS* advisory board member Leslie Bonci, R.D. The chocolate and carbs fight fatigue and raise endorphin levels.**
**FITNESS MAGAZINE