Highly intensive training boosts metabolism. However, you should consult a physician first to make sure that a quick heart rate and accelerated pulse won't harm your health. If your health is ok, count your maximum pulse using the following equation: 220 minus your age, then multiply it by 0.7 (if you're a beginner) or by 0.75 (if you're a pro).

The best exercises to speed up your heart rate are high-speed running on a racetrack, jump rope training, running in place, or kickboxing. Do cardio workouts in the morning on an empty stomach – it's the perfect time to burn the most stubborn fat.

To become a real-life Thor, Chris Hemsworth began his preparation half a year before filming. To gain muscle mass, the actor did a lot of weight training. High-protein foods (meat, chicken, eggs), protein drinks, and unprocessed carbs were the basis of his diet.

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