Sports science brings data to youth volleyball development
Let’s Keep the Ball Flying founder Lesley de Jonge (right) and Trailblazers CEO Leshan Julius for an American volleyball clinic at Pharo School Nairobi on Tuesday, June 23 2026.
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Sports technology is giving coaches new ways to
measure athlete development beyond what can be judged through observation, with
Trailblazers Elite Foundation set to assess its young volleyball players using
VALD technology on August 14.
VALD is a sports-performance technology platform
that provides tools for measuring physical performance and movement, allowing
coaches and performance teams to collect objective data and track changes over
time.
Trailblazers Elite Foundation founder and CEO Leshan
Julius says the assessment is aimed at establishing individual baselines for
the young athletes.
“For a long time, or traditionally, we have been
teaching these kids how to play volleyball. We really want to understand each
individual athlete, how they move, how they produce their force, their strength
and the areas that need development,” Julius said.
Rather than relying only on group-based assessments,
the athletes will be assessed individually, with the findings expected to
inform their training programmes.
He added that the technology will complement
coaches’ observations by providing measurable information that can be compared
over time.
“We need something that is measurable, that we have
a baseline to say, as we are training, this is where we started from and this
is where we are now.”
Trailblazers has previously used catapult, an
athlete-monitoring technology that collects data to help coaches understand
training and workload. Julius said VALD has also been used with the
foundation’s senior team and is now being introduced into the youth assessment
programme.
The results are expected to be used to build
individual athlete profiles and identify areas requiring attention, rather than
simply collecting data without applying it to training and also remain a
support tool for coaches.
“The data that you are getting from this assessment
becomes part of our development programme, then, we build a profile for this
player…Technology will not replace the coaching. Instead, it will give a coach
better information to make better decisions,”
The International Olympic Committee's (IOC)
consensus statement on youth athlete development supports appropriate
physiological monitoring and sport-specific performance testing, including to
evaluate training programmes and monitor health and performance.
However, it stresses that youth athletes develop at
different rates and that growth and biological maturation should be considered
when assessing and developing them.
The IOC also notes that testing should be properly
interpreted and communicated by relevant members of an athlete's support team,
rather than treated as an isolated measure of performance.
Furthermore, Julius said Trailblazers plans to
repeat its assessments, potentially after three months, to determine how the
athletes have progressed from their initial measurements.
The shift towards data-driven athlete development is
growing, but its value in youth sport will ultimately depend on how accurately
the information is interpreted and applied to training.
For young athletes, the technology can provide
useful measurements but those figures still need to be understood within the
context of individual growth and development.

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