Q: I'm training for a marathon. How do I keep my muscle mass up without compromising my speed?
Answers:
Strength training can increase your endurance and strengthen the muscles around your knee and ankle joints to protect you from injury. If you're serious about the race, you should be running four or five times a week, including one long run (up to 20 miles late in your training). Two to three days of easy lifting each week is plenty. Focus on larger muscle groups with lunges, squats, and pushups. And stretch every day to stay limber.
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