Treadmills to deadlifts: Why Gen Z are swapping cardio for strength training

When Antonia Duffin, 34, started going to the gym, she wanted to lose weight and tone up.

It became such a big part of her life that she decided to become a personal trainer alongside her day job in operations for a supermarket chain - and now runs her own women's gym in Manchester.

"Some of my clients want to feel stronger, some want to get in shape for a baby and some are struggling with other conditions like endometriosis and want to feel better," she says.