Do Long Runs Burn Muscle?
When Running an Hour or Longer, Are You at Risk For Burning Muscle?
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Rachel said you can go for long runs frequently if you're properly fueling yourself. "As long as you consume enough carbohydrates and calories, you can do several long runs per week. If you're training for a race, be sure to eat enough to sustain your training," she said.
NASM-certified personal trainer Jared Hamilton suggested spacing out your longer runs to allow enough time for rest and recovery. "So instead of doing three long runs on Monday, Tuesday, and Wednesday, I would do them Monday, Wednesday, and Saturday, for example," he said.