Once the athlete develops a baseline level of strength, there are countless exercises that can be done in quick bursts of energy. (blog.bridgeathletic.com)
In other words, it's the combination of caffeine with large amount of sugars that provide you with short bursts of energy. (fitnessandpower.com)
It took a long while to get the pregnancy burst of energy in the second trimester with my second pregnancy, but then it never went away — even at the end. (ababyonboard.com)