Joseph Pilates dedicated his life to refining the system of physical exercises he created whilst detained at the Knockaloe camp near Peel.
Organisers said Pilates' methodology had "benefited millions worldwide".
Pilates spent about three and a half years interned at the camp, which was designed to hold about 23,000 people.
The Knockaloe camp was divided into 23 compounds, each designed to hold 1,020 internees.
Organisers recreated that figure for the one-off 45-minute class.
A spokeswoman said the class had been inspired by seeing a postcard depicting internees putting on a Pilates display, just 15 days after he arrival at the Knockloe camp.
During his time in the camp it is believed the young Pilates worked in the camp's hospitals and was highly respected.
He spent his time developing a comprehensive system of physical exercise which he called "Contrology".
Mo Sherring, of the Isle of Man Pilates Studio, said it is "not just a series of exercises" but a "conceptual approach to movement".
Pilates invented his own unique apparatus formed from the springs from his dormitory bed.
He also studied the movement of animals.
After the war he dedicated his life to refining his methods which are still used widely across the world.

The 33-year-old former Stevenage and Fleetwood player made 52 league starts for Cambridge over the past two years.
He has signed a one-year contract with Mark Cooper's side.
"I was involved in two successful promotion campaigns [with Stevenage and Fleetwood]. I'd love to have a third," Roberts told BBC Radio Gloucestershire.
Speaking of the former Crewe youngster, who has also played for Accrington, Rovers boss Cooper added: "He is a good, solid defender and he'll give our younger players that little bit of guidance."
Cambridge chief executive Jez George told their club website: "Since arriving at the club, Mark has been an absolute professional, on and off the pitch."
On Wednesday, Forest Green confirmed the departure of midfielder Rob Sinclair by mutual consent.
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The 33-year-old made a total of 12 Test appearances and played a vital role in the 2010-11 Ashes victory in Australia.
"After 16 enjoyable years I feel that now is the right moment to call time on my playing career," the Surrey player wrote on Twitter.
"Unfortunately injury has hampered me throughout my career and now plays the leading role in my decision to retire."
Tremlett has been affected by back and knee injuries in recent years and has been restricted to three Championship appearances for Surrey this season.
"My body, and back in particular, can no longer withstand the vigour of performing at the level required to play professional cricket," he said.
"After taking specialist advice this latest injury means that I will not be able to carry on.
"I have always tried to give 100% commitment and effort whenever I have played but no longer feel that this is possible."
Southampton-born Tremlett, who began his career at Hampshire before moving to Surrey in 2010, took 53 wickets at an average of 27 in his 12 Test appearances for England.
The most significant, however, were the 17 in three matches as England won the Ashes in Australia in January 2011.
He also played 15 one-day internationals and one Twenty20 match for England, with his last appearance for the national team coming in the first Test against Australia in November 2013.
"Wearing the Three Lions was the pinnacle and I enjoyed every minute of the challenge, experience and ultimately the success that the team had," he added.
"I have been extremely fortunate to have enjoyed such a fantastic and memorable career and lucky enough to play with and against some of the best players in the world."
More than 1,000 people have taken part in a Pilates class at the place where its German creator was interned on the Isle of Man in World War One.
[NEXT_CONCEPT]
Forest Green Rovers have signed defender Mark Roberts after his contract at Cambridge United was cancelled by mutual consent.
[NEXT_CONCEPT]
Former England fast bowler Chris Tremlett has announced his retirement from all forms of cricket.