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Jonas Mathiasen

Availability status: Available

Personal Profile

Country: Denmark

Date of birth: 28/11/2006

Height: 6 feet 1 inches

Weight: 176 lbs

Sex: Male

Academic Information

Graduation year: 2025

Enrolment Year: 2026

Qualifications: 

High School Grades: Coming soon…

SAT: Not taken yet

TOEFL: Not taken yet

Swimming Profile

PERSONAL BEST TIMES

50m Free (SC): 23.00

50m Free (LC): 24.42

100m Free (SC): 50.85

100m Free (LC): 54.16

200m Free (SC): 1:57.57

50m Fly (SC): 27.08

50m Fly (LC): 26.81

100m Fly (SC): 58.19

100m Fly (LC): 1:00.71

100m IM (SC): 1:00.77

BIGGEST ACCOMPLISHMENTS

2023 West Danish Junior Champion

Competed in the Danish Senior Nationals

Competed in the Danish Junior Nationals

Competed in the Danish Nationals for clubs D2

Competed in the Danish International Swim Cup

Interview

Give us 5 words that best describe you as an athlete:

Explosive, driven, analytical, motivating, funny.

Tell us about your best memory of your athletic career:

It would probably be my competition at the end of May 2025 (Danish International Swim Cup) and the 2.5 months of training leading up to it. For a long time, I had been tired of the training I was doing. I was tired of swimming 5–6 km every session, swimming 10 times a week, plus 3 strength sessions. I wanted to be a sprinter, and I eventually struggled to see how this kind of training made sense for me. I hadn’t gone a PR in a long time, and I was fed up with everything. But my new coach, who came from the Netherlands to coach alongside my old coach, Bo Jacobsen, told us we should try something new. 

So we drastically reduced the volume, and I switched to a 5/5 split: 5 swim sessions a week and 5 strength sessions. Every swim session and every gym session was targeted specifically toward my 50 and 100 freestyle. I took it very seriously during those 2.5 months, because I was afraid it would flop for me. But I stuck to the plan, even though I was only swimming about 15 km per week and lifting harder than ever with exercises directly focused on improving my 50 and 100 free. 

After 2.5 months of hard training, it was time to reap the results. I swam my best times ever, and I had only been training this way for 2.5 months. I dropped 0.91 seconds in my 50 free and almost 2.5 seconds in my 100 free.

All of this happened in just 2.5 months of a training style that went against the norms in the swimming world. Therefore this is probably the biggest memory of my career.

Goals:

To be a good role model for the younger swimmers on my team 

To swim sub-50 in 100 free SC (latest at DISC 2026) 

> 22.60 50 Freestyle SC (Latest at DISC 2026) 

> 23.40 50 Freestyle LC (This Season) 

Long term goals : 

> 22.17 50 for the Freestyle SC 

> 22.59 for the 50 Freestyle LC 

Both these are old club records in Esbjerg Svømmeklub from 2009 and 2011.

Anything else we should know?

My long course times from this season will become a lot faster. 

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