Ripped. Shredded. Jacked. Swole. Which are you?

Gym jargon such as this, which refers to the size and definition of muscles, has long been heard exchanged between pumped men in gym locker rooms - and now among teenagers too.

TikTok videos show boys as young as 13 and 14 in school toilets, flexing veiny biceps which bulge out of their school uniforms.

The quest for brick-like abs has become serious business - even if you're still only in Year 8 - with posts on socials with hashtags like #shreddedphysique being viewed more than four billion times.

The desire to get this look, for many, might mean doing a few deadlifts and drinking a protein shake from time to time. For others, it could be working out a few times a week, playing sport and eating a lot of chicken.

But for a growing few it means going to the gym most nights, often following intense training regimes from social media, and learning how to "cut and bulk".

The cut and bulk cycle consists of eating hundreds of calories more than your recommended daily intake to get bigger, retaining some fat in the process, then several weeks later cutting calorie intake down to lose the fat for a leaner, more defined look.

It can be all-consuming, and involves a lot of calorie counting, working out and dedication.

Some sports nutritionists say it can be harmful - affecting hormone health, growth, and development, and could potentially lead to problems with eating disorders such as muscle dysmorphia - the idea your body is smaller and less muscly than it actually is.

I've spoken to three teenagers, who all share a love of the gym, about what is driving them to get ripped this way.

When George Holland first walked on stage he thought he might feel nervous.

The 14-year-old was by far the youngest contestant in the under-19s category of the National Amateur Body-Builders' Association finals.

Wearing fake tan and a pair of small trunks, it might have felt a bit exposing to start flexing his muscles before an audience of hundreds - but, George says, "I had practised everything and I knew there was nothing to be worried about."

He went on to win the bronze medal.

George joined a gym when he was 11, having watched some of the bodybuilding greats online who inspired him to give it a go. In the early days, he explains, he would work on each muscle group twice a week, lifting no more than 10kg - the heaviest permitted for a child........

© BBC