Luteal phase: During the first five days of the luteal phase, you still have elevated estrogen and testosterone levels, and progesterone enters the picture. You’ll still have a good dose of energy, but not as much for high-impact activities. Use this energy to maximize lean muscle gains by focusing on any kind of strength training. Once you hit the second half of the luteal phase, all three of your reproductive hormones begin to diminish in concentration, shifting you out of muscle-building mode. To align with this phase, switch to workouts that focus on flexibility. Workout suggestions: first
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