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About junior triathlon.

Triathlon is one of the fastest growing Olympic sports with events like the London Triathlon now attracting over 5000 people, including many first timers.

Triathlon involves athletes racing over three disciplines, swim, bike, run with varying distances dependant on age for younger athletes.


The standard senior Olympic distance consists of a 1.5km swim, 40km bike and 10km run and for a tougher challenge senior athletes undertake the full Ironman – 2.4 mile swim, 112 mile bike, 26.2 mile run.

Thames Valley Tristars concentrates on the following typical distances for junior members (age as of 31st December):

AGE GROUP                        SWIM                 CYCLE (GRASS)            CYCLE (TARMAC)                    RUN

TriStar Start (Age 8)          50m                           800m                             1.5km                              600m

TriStar 1 (Age 9-10)          150m                           2km                                4km                               1.2km

TriStar 2 (Age 11-12)        200m                           4km                                6km                               1.8km

TriStar 3 (Age 13-14)        300m                           6km                                8km                               2.4km

Youth                                  400m                          10km                                                                      3.8km



Minimum Requirements

1. Minimum age – 8 years by 31st December (younger brothers and sisters are welcome to stay for run and bike training sessions but must be accompanied by a parent)

2. Maximum age – no older than 16 years on 31st December

3. Each member must be able to continuously swim the distances above for their age group before joining. We will be helping with swim technique but this is no substitute for formal lessons. Please ensure you continue with your regular swim lessons.

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