Athletic development for girls aged 7–16. Build strength. Build speed. Build confidence. Build resilience. Build the foundations for whatever comes next.
More than sport
SIBI NEXT GEN™ is built around the whole athlete. We combine athletic development, strength & conditioning, movement, speed, agility, coordination, confidence, resilience and performance habits to help girls understand their bodies, challenge themselves and develop skills they can carry far beyond the pitch, court or track.
Clubs develop the player
within the team.
SIBI develops the athlete
within the player.
Skills for sport. Skills for life.
Holistic by design
Training is only one part of how a girl develops. SIBI NEXT GEN™ treats physical preparation, mental wellbeing and lifestyle habits as one programme, because separating them is exactly what lets girls down.
Physical
Speed, strength, movement and power coached properly for her age and stage, with growth spurts, injury risk and female physiology planned for rather than worked around.
Mental
Confidence, focus, self-talk and resilience. Girls learn to handle pressure, recover from a poor game and speak up for themselves — on the field and off it.
Wellbeing
Fuelling, sleep, recovery and hormone awareness, discussed openly and age-appropriately, so she understands her body instead of guessing at it.
The system
Strength. Skill. Mindset. Recovery. Healthy habits. Hormone awareness. Everything a next-generation female athlete needs — delivered with purpose, precision and high standards.
Sprint technique, acceleration, deceleration and landing — the mechanics that make every sport faster and safer.
Age-appropriate strength and conditioning that builds robust, powerful bodies ready for the demands of their sport.
Change of direction, balance, rhythm and body awareness — transferable athleticism, not sport-specific drills.
Confidence, self-talk, competing under pressure and bouncing back. Mental performance trained like a physical skill.
Sleep, fuelling, recovery and hormone awareness, so girls understand their bodies through every stage of growth.
Standards, preparation, consistency and ownership — the habits that separate a player from an athlete.
Services
No two athletes are the same, so the programme around her shouldn't be either. Pick the format that fits — then talk to us about requirements and pricing.
FlagshipEvery Friday
Group sessions
Our flagship weekly session. Girls train together in coached groups matched by age and stage — strength, speed and movement wrapped in a team atmosphere they look forward to all week. It's where most families start.
Private sessions
Undivided coaching for an athlete who needs it — coming back from injury, preparing for trials, or rebuilding confidence after a fall-out with training.
Small-group training
Very small groups training together with a coach whose attention never has to be split. Close to a 1:1 in quality, shared in energy and in cost.
For clubs & teams
We bring SIBI NEXT GEN™ to your club: pre-season strength blocks, movement and injury-risk workshops, female-athlete education and coach development, delivered at your venue.
Pricing depends on the format, frequency and venue, so we quote personally rather than publish a price list. Tell us what you need and we'll put something together.
Tailored by stage
A seven-year-old and a sixteen-year-old are not the same athlete. Girls develop fast, and not in a straight line, so SIBI NEXT GEN™ groups athletes by developmental stage as well as age — every session matches what her body and mind are ready for right now.
Fundamentals & play
Everything starts with movement. Running, jumping, landing, skipping, throwing and balancing are coached as skills in their own right, through games and challenges that keep energy high.
Skill window & growth spurts
This is a prime window for learning movement patterns — and often the first big growth spurt. We coach technique carefully while bodies change, protecting coordination and building a resilient base.
Strength, power & female physiology
As girls mature, training becomes genuinely performance-focused. We load strength properly, develop power and speed, and coach openly about the menstrual cycle, energy, fuelling and recovery.
Coaches re-assess every block, so an athlete progresses when she's ready — not simply when she has a birthday.
Pathways
Two pathways, one system. Small groups, high standards and coaches who know how to get the best out of girls.
Ages 7–11A high-energy introduction to athletic development. Girls learn how to move well, get strong in their own bodies and discover they can do hard things.
Ages 12–16Serious athletic development for girls who compete. Structured strength, speed and power alongside mindset, recovery and female-specific health education.
Why SIBI
Girls and women have been supported in separate pieces — fitness, mental health, female health and performance all treated independently. We deliver one joined-up, female-specific system.
Her club
SIBI Next Gen™
Trains the sport
Trains the athlete
Mixed coaching designed around boys
Built entirely around female physiology
Technical drills and match play
Strength, speed, movement and recovery
Confidence assumed
Confidence coached
Growth spurts worked around
Growth spurts planned for
How it works
01
She trains with a group, meets the coaches and sees what a session actually feels like. No obligation.
02
We screen movement, strength and confidence to understand where she is and what she needs next.
03
Weekly coached sessions — Elevate on Fridays, a small performance pod, or 1:1 work — matched to her stage, schedule and goals.
04
Every block we re-test, celebrate the gains and set the next targets — with parents kept in the loop.
The founders
Kate, Lesley and Laura grew up in sport together and bring complementary strengths to the programme. Next Gen is the first phase of a wider vision — beginning with girls and adolescent athletes, before expanding to women.
Founder · CEO · Coach
Kate created SHEISBOSSINGIT because she saw the real gap: girls and women being supported in separate pieces when they need a complete, joined-up, female-specific approach. With over 20 years in law enforcement, security and specialist training, she brings deep expertise in resilience and performance under pressure. A lifelong athlete who represented Wales in netball at youth level, and a mum of three daughters, Kate leads the partnerships, growth and vision of SIBI.
Director of Coaching & Programme Development
Laura is the technical expert behind the SIBI methodology. An ex-Welsh international netballer with experience across youth, club, county and regional pathways, she is a strength & conditioning coach, PT, Pilates instructor, nutritionist and Level 5 injury massage specialist. She leads coaching standards, programme design and coach development — because girls need a joined-up approach, not simply more drills.
Creative Director · Coach · Safeguarding Officer
Lesley has been surrounded by sport her entire life, coming from a family of professional athletes. She leads the visual identity and experience of SIBI, ensuring every space and session reflects the brand's standards. As a coach she brings warmth, connection and calm confidence, and as safeguarding officer she holds the highest standards of safety and well-being for every girl in the programme.
Parent feedback
She came home from her first session buzzing. It's the first time she's trained somewhere built for girls, and you can see the difference in how she carries herself.
The coaches explain why they're doing everything. My daughter now understands her body, her recovery and her cycle — that's education she'll keep forever.
So many girls willing to push their limits and, most importantly, wanting to progress. Build the foundations. Trust the process.
FAQ
Join Next Gen
One session, no obligation. Tell us about your athlete and we'll place her in the right group and confirm a time within 48 hours.
Small groups, high coaching standards
Female-specific programming, start to finish
Qualified S&C coaches and a safeguarding lead
Get in touch
A Friday group session, a small pod, private 1:1 work or a programme for your whole club — describe the situation and we'll advise honestly on the format that fits, then talk through requirements and pricing with you.
Every message gets a reply, usually within 48 hours.
