3. Interval training
The latest running boom has made it fashionable to jog a half-marathon in three hours, pick up a finisher’s medal, and feel a sense of accomplishment for a 14-minute mile pace that’s abusing your joints and providing little benefit. Focus instead on shorter workouts at a track or grassy park. Start with a five-minute warm-up and then alternate between two-minute intervals of running at 80% effort followed by walking for two minutes. End with a five-minute cool down and call it a day at 30 minutes. You’ll get far better impact than the “half-marathoner” going out for their daily four-mile waddle.