Karl wears short shorts! Today host Karl Stefanovic shows off his trim pins in activewear

Karl Stefanovic’s penchant for wearing short shorts is well-documented.

And the Today show host, 48, was up to his old tricks again on Wednesday as he arrived home following a morning workout in Sydney.    

Defying the city’s freezing winter temperatures, the father-of-four was spotted climbing out of his car in a pair of perilously short gym trousers. 

Karl showed off his toned physique in a pair of Under Armour shorts, which he teamed with a plain black T-shirt and black jacket. 

He added to his sporty look by wearing red Asics and long black socks.

Karl looked understandably a little tired as he hopped out of his car after the workout, which was completed after his early morning start on the Today show. 

Karl is keeping fit after losing eight kilos in August last year during a 10-week weight loss program that was documented on the Today show.

The TV star was aided in his efforts by obesity expert Dr. Nick Fuller and Karl followed an interval weight loss program.

‘Karl put up his hand on air approximately a few months ago telling me he wanted my help and kudos to him,’ Dr. Fuller told Daily Mail Australia at the time.

‘Women are usually the first to admit they have a problem when it comes to weight, but it’s rare men do anything about it until a serious health scare happens. We need more male public figures and celebrities to follow suit.’ 

Karl previously revealed that his program, which included a lighter evening meal, had helped him get to sleep much quicker and left him feeling more refreshed in the morning. 

The father of four acknowledged he did have difficulty about halfway through the program, and found that having a cheat day on Friday was helpful.

Karl’s weight at the time he started the program was 105kg.