Strength coach Ed Haynes took his mum from not being able to hold a plank at 59 to performing pull-ups at 76. Here's how. Lillian Haynes reaches overhead and wraps her knuckles around a chalky metal pull-up bar. She takes a deep breath, sets herself, then contracts her back muscles, pulling her body skywards with surprising ease. She is 76 years old. Later, she cranks o... [6804 chars]