This is how a 50-something trainer changed how he lifts weights to protect his joints

A man curls an EZ-curl barbell up to his chest in a gym, while a trainer watches him and makes notes in a book. .

By the time we get to midlife, many of us have accumulated injuries, aches and pains that can cause problems in the gym.

These issues can be off-putting, but they shouldn’t stop you from starting a new workout routine—or continuing to enjoy the one you already have.