Foreign students warm up for a two-hour training session in martial arts in Guangzhou, capital of South China's Guangdong Province.

It is 7 pm on a mid-week evening and 33-year-old Richard Newton, a UK native and long-time Guangzhou resident, begins his evening by running and stretching before starting the first of a series of 50 repetitions of sit-ups. Over the next two hours, he'll practice close-range punching and kicking alone then work with a practice partner. Next is self-defense tactics before free sparring. He wears safety pads to protect his body from potentially painful blows by fellow Wing Chun students.

In nearby Tianhe Stadium, Ollie Pekka from Finland gets busy with a long series of stretches and push-ups before beginning a two-hour training session in which he'll practice repetitive leg kicks and long-range punches before donning protective gear for his own Taekwondo sparring session.

Also near the Stadium, Frenchman Charles Foret starts off raining blows on a heavy punching bag as he toughens up his body. He will then embark on a gruelling two-hour training session, to develop the skills needed to deliver punishing punches and elbow, knee and leg blows, to a similarly aggressive partner, but without the aid of protective gear. Alongside him, Muay Thai professionals, are already hard at work, pummelling padded bags with their knees or legs or doing an impossible number of stomach crunches from an inverted start position.

These three amiable expats are just some of the hundreds of foreigners and thousands of locals studying martial arts in the city.

Other fighting styles, such as Judo, taichi and the king of fight techniques, wushu, are also the favorites of students, who are making choices based on comfort, degree of difficulty or peripheral benefits.

Despite its slow movements, taichi is actually a martial art. It became popular after the 1970s US television series Kung Fu starring David Carradine, who used this technique.

There are thousands of taichi students in Guangzhou, not counting the elderly, who traditionally favor the gentler genre.

Excluding primary and secondary schools, there are up to 15,000 people practicing martial arts in the city, says Huang Biao, administrator and instructor at Guangzhou Wushu Association. About 20 percent are doing Thai boxing and another 30 percent learning Taekwondo, says Better Chen Changjie, who is both a Muay Thai boxing and Taekwondo instructor at Muay Thai Martial Arts Club Guangzhou.

"I've been practicing kungfu for more than 10 years," says Newton, who now studies Wing Chun under local master Huang Wian Yin. "Doing martial arts gives me more confidence. I feel I can handle myself. This is important, especially nowadays where people live and work in strange (and potentially dangerous) cities all over the world."

Having a fighting skill, Newton says, "is practical, useful for self-defence." On a daily basis, "it gives you strength, more energy. And it can lift your spirits."

"Learning a martial art requires commitment. Training is intense, but manageable. If you want to progress you can't slacken. Sometimes you don't feel like coming to class but you must. Language can also be a problem here, but luckily with martial arts a lot is learnt by copying the teacher."

Wing Chun is probably less dangerous than playing football, despite its combative nature, Newton says. "You only think about the game and winning, not injuries. But when you do martial arts, you are focused on your moves and your partner, so you are more alert to danger."

What began merely as a way to exercise has turned into a growing passion for 25-year-old Pekka.

The office worker needed some outlet and doing Taekwondo requires good balance because there is a lot of kicking. He found that his reflexes and health have improved, and he can get up at 7 am on a Sunday and generally feel he has more energy.