PowerBar® Harvest Energy™ bars are perfect for dedicated athletes looking to fuel up before and/or during moderate-intensity exercise. PowerBar® Harvest Energy™ bars have 9 grams of protein and 5 grams of fiber per bar. Some bars include whole grain while others have nuts. Eat 1 bar 30–60 minutes before exercise. For moderate-intensity activities lasting over 1 hour, eat 1 bar per hour.