Denver Volleyball Shoulder & Knee Health Clinic | Powercore 360
Denver, Colorado · Power Hitting Clinic · Ages 12 to 17

40% of volleyball players will have shoulder pain.
20% of volleyball players will have knee pain.

More practice means more risk, and the pain can follow athletes for years after they stop playing. Our hands-on clinic is coming to Denver to teach athletes to hit and land with the whole body, so the shoulders and knees stop taking the beating.

Reserve a Denver Spot
Founded by a spine-center training director
Physical therapists on staff
1:8 coaching onsite, 1:4 online
What the Research Shows

Shoulder and Knee Pain Are Common.
They Aren't Random.

Frisch et al., 2017: 40% of female high school volleyball players reported nontraumatic shoulder pain; 33% of them took time offForthomme et al., 2013: prior shoulder pain meant nine times higher risk; eccentric rotator strength was protectiveBoden et al., 2000: 72% of ACL injuries were non-contact, mostly during a sharp deceleration or landing

Tap a study to see it full size.

Pain that comes and goes is usually a mechanics problem, not bad luck.

Why It Happens

One Root Cause.
Two Joints That Pay for It.

Shoulder and knee pain usually share a cause: one joint doing a job the whole body should share. Our training teaches the whole body to create force on the way up and absorb it on the way down.

On the way up

The Shoulder

Arm-only swing

HipsTrunkShoulderArm

The shoulder makes the speed and takes the load on every swing.

Full-chain swing

HipsTrunkShoulderArm

The legs and hips make the speed. Trunk rotation shares the load.

What we teach

  • Hip turn and trunk rotation
  • Rotator cuff and eccentric strength work

Research identifies eccentric rotator cuff strength as a protective factor (Fayão et al., 2024).

On the way down

The Knee

Stiff landing

AnklesKneesHipsTrunk

Straight knees and an upright trunk, so the knee absorbs the force.

Controlled landing

AnklesKneesHipsTrunk

Ankles, knees, and hips bend together and share the force.

What we teach

  • Safe landing coaching with 1:8 feedback
  • Jump mechanics and load education

Individual landing feedback improved landing mechanics in 12 to 14 year old girls, and it held 4 weeks later (Parsons & Alexander, 2012).

These are the mechanics researchers link to healthier shoulders and knees.

Billy Glisan, Powercore 360 CEO and Founder
Who We Are

Powercore 360
CEO & Founder, Billy Glisan

National Director of Training for 12 rehabilitation centers at the nation's largest spine center.

Published author on spine and back care, including contributing author of Back In Shape and the consumer guide 50 Ways To Reduce Back Pain.

Injury prevention consultant to Fortune 500 companies including General Motors, Shell, ExxonMobil, Texas Instruments, and Target.

Power hitting and strength consultant for Division I, II, and junior college volleyball programs.

Over 20 years training club, collegiate, Olympic, and professional athletes.

Your Athlete's Coaches

PC360 coaches include former collegiate players, physical therapists, and strength and conditioning coaches, all trained in the PC360 method.

Real Results

Families and Clinicians
See the Difference

PT & Daughter

Aubrey Packer

"My shoulder pain has completely gone away."

Pro Volleyball Player

Nicole Edelman

"If you're not using your whole body to hit, you're setting yourself up for injury."

Amazed Mother

Brooke Robbins

"I'm seriously in shock right now. I cannot believe the difference in 20 or 30 minutes."

Division I Hitter

Emma Ammerman

"I saw dramatic changes in my game. You can actually feel your body moving differently."

Hall of Fame Coach

Terry Pettit

"Powercore 360 is the best tool I know of for teaching an athlete the power to serve and spike a volleyball."

Pro Player & Coach

Ryan Ammerman & Jim Merit

"It's been amazing to see the results in just one session."

Proven Track Record

Our athletes have gone on to play at these schools

College logos: Nebraska, Florida, Texas, Penn State, Stanford, Notre Dame, Washington, Ohio State, Arizona, Duke, Oklahoma, UCLA, Oregon and more
Bonus: They'll Hit Harder
Up to 75%
Lower peak shoulder load when the trunk rotates with the arm

Protecting the shoulder and hitting harder aren't a trade-off. Research modeling the volleyball spike found that rotating the trunk with the arm cut peak shoulder load by up to 75%, while arm speed came from the legs and hips.

Gupta et al., 2021, Life

Reserve a Denver Spot
Proud Father

"She went from not even hitting 25mph to hitting 34mph."

Sammy, clinic parent

Gupta et al., 2021: trunk rotation cut peak shoulder torque by 75%; lower-limb swing raised wrist velocity 25%

You Asked for It.
We Listened.

You told us what would make your clinic experience even better, and we agree. Here’s what’s new.

1 Coach per 8 Athletes Max

We used to train up to 36 athletes per clinic. You asked for smaller groups, so we’re capping each session at 16 athletes. That means a lot more individual attention for every athlete.

1 Day In Person + 1 Month of Personal Follow-Up

Two full days of training is a lot. By day two, athletes are tired and have a hard time taking in more information. Real skills also take time to stick with any kind of training. So you asked if we could offer the second half of the clinic as live online training, and we did. Your athlete trains with us in person, then continues with live online coaching over the following four weekends.

Our Full Training System

In a single weekend, we could only get through about half of our training system. Working with your athlete over multiple weeks lets us cover the full system, which is key to long-term success.

The 8-Hour Clinic

What Happens
Onsite and Online

One 5-hour hands-on onsite clinic, followed by four 1-hour live online sessions over the next four weekends. Athletes leave with power hitting mechanics they can build on.

Onsite | 5 Hours
Learn & Feel
Live Online | Four 1-Hour Sessions
Train & Apply
Onsite | 5 Hours

Learn & Feel

Arm, shoulder and back mechanics for power hitting and arm speed
Hip turn and body rotation: feel the windup and unwind
Equipment fitting and instruction
Arm-speed exercises they can do at home
Connecting the approach, jump, and swing
Jumping and landing with control
Live Online | Four 1-Hour Sessions

Train & Apply

Review of the movements introduced onsite
Live drills with individual feedback and adjustments
Connecting the movements to hitting in the air
Building a consistent approach, swing, and landing
Progress review through movement observation and ball-speed measurements when available
Optional practice suggestions between sessions
Progress Tracking

We Measure It.
Then We Track It.

Improvement you can't measure is just a guess. Every athlete gets swing data at the clinic, and our new tracking app follows those numbers through their whole journey with us, so we know they keep improving.

Sample Power Hitting Profile showing ball speed, swing video, coach recommendation, and training focus

Sample Power Hitting Profile. Tap to see it full size.

1

Baseline at the clinic

Coaches record your athlete's ball speed on an in-air throw and hitting off hooks, plus video of the swing. It all goes into their Power Hitting Profile.

2

A plan built from the numbers

Each profile includes a coach's recommendation and a training focus, so the online sessions work on what matters most for your athlete.

3

Progress you can see

Over the four follow-up online sessions, coaches review progress against the baseline. You see whether the new mechanics are sticking, not just hope they are.

Included With Registration

Athlete Clinic Pack
$399 Value, Yours to Keep

Every registered athlete receives the full PC360 Clinic Pack at the event, with everything you need to keep training at home after the clinic.

PC360 Athlete Clinic Pack

Body Systems Trained

Arm Speed Hip Turn Shoulder Turn Rotator Cuff Core & Spine

In Your Clinic Pack

→ 1 Hip Harness
→ 1 Black Band (Light Resistance)
→ 1 Exercise Handle
→ 1 Anchor Strap
→ 1 Carry Bag
→ 1 Small Ball

Post-Clinic Access

→ Four live 1-hour online coaching sessions (1:4 coach ratio) over the four weekends after your clinic
→ 2 Months FREE PC360 Skool Community & Training Platform
→ 8-Week Arm Speed Training Program
→ Access to LIVE Group Training Sessions & PC360 Coaches
→ Multiple Training Courses (Arm Speed, Strength, Vertical Jump, ACL Injury Prevention)

Sizing Measured at Registration

Equipment is sized during registration and shipped to the clinic location. Athletes keep everything after the event.

Getting Started

Here's What Happens
After You Sign Up

1

Register

Choose your Denver session, review your four online session dates, and provide sizing information.

2

Equipment Ships

Your Clinic Pack ships to the Denver venue, ready for your onsite session.

3

Train & Improve

Train onsite with elite coaches, take your Clinic Pack home, and continue with four weekly live online sessions. Leave with measurable results and a training roadmap.

Denver, Colorado

DENVER CLINIC

5 hours onsite + 4 live online coaching sessions

Denver, CO

● Open

Onsite clinic

Sunday, November 15, 2026

2 to 7 PM

Venue

Front Range Volleyball Club

8480 Upland Dr #100, Englewood, CO 80112

Online sessions

[ONLINE DATES]

Register

Can't make the Denver date? See all 2027 clinic cities

Questions? Call (877) 723-6014 or email Kelly@powercore360.com

Choose Your Option

In-Person Clinic

Power Hitting Clinic

You pay today $899

Denver clinic

  • 5-Hour Hands-On Onsite Clinic + 4 Live Online Coaching Sessions
  • Clinic Pack: $399 value
  • 8 Weeks of Post-Clinic Virtual Training
  • Performance Video Analysis
  • Access to Skool Community
Reserve a Denver Spot
Lifetime Pass

Volleyball Lifetime Training Pass

Total value: $31,915

You pay today $1,997
  • Lifetime Skool Program Access: (Vert, Strength, ACL Injury Prevention, others)
  • Full Access to 8-Week Power Hitting Masterclass: $599 value
  • In-Person Clinics: at no extra cost
  • Weekly Swing & Technique Analysis
  • Unlimited Live Zoom Group Training Sessions
  • 1 Full Volleyball Training Product: $499 value
  • Unlimited Repeat Access: never pay again
Sign Up: $1,997
Parent Questions

Frequently Asked

The onsite session is at Front Range Volleyball Club, 8480 Upland Dr #100, Englewood, CO 80112, on Sunday, November 15, 2026, from 2 to 7 PM. Your athlete's Clinic Pack ships to the venue ahead of the event.
Many athletes come to us for exactly this. If your athlete is under a provider's care, check with that provider first. Our coaching complements their care, it doesn't replace it.
No. It's mechanics, strength, and movement coaching from a team that includes physical therapists.
The 8-week program, the rotator cuff routine, and live group sessions, plus four live 1-hour online coaching sessions with a PC360 coach over the weekends after the clinic.
The ideal age range is 12 to 17. Athletes must be at least 12 years old and able to focus during intensive training. We cap enrollment at age 18 for clinic sessions.
No specific level is required. The clinic is built for any motivated athlete, beginner through elite. If your athlete has an open mind and wants to improve, they will see results.
They take place over the four weekends following your onsite clinic. Each clinic listing shows the dates, times, and time zone.
A volleyball, a way to hold the ball for in-air hitting, a tarp or catching net, about 10 feet of approach space, Wi-Fi, and a smartphone with Zoom installed and a working camera. No volleyball court is needed.
Equipment sizing is collected during registration. Your PC360 Clinic Pack is shipped to the clinic location ahead of the event. Athletes use their pack during training, and it goes home with them after the clinic.
Clinic registrations are non-refundable. If an athlete has an illness or injury with a physician's note, a refund may be considered. Athletes may transfer to a different clinic date or city within a 1-year credit window.
PC360 coaches include former collegiate players, physical therapists, strength and conditioning coaches, and educators. All are trained in PC360's methods and selected for their ability to coach athletes one on one.
The clinic combines a 5-hour hands-on onsite session with four live online coaching sessions at a 1:4 coach ratio, so athletes get individual feedback as they apply the movements at home. The online 8-week Masterclass makes mechanics changes permanent through structured homework, step-by-step progressions, and weekly coach feedback. Many families do the clinic first, then the Masterclass to lock in the gains.
Yes. We track performance before and after every clinic, and athletes average 19 to 27% improvement in performance and confidence. Results are real and measurable, not vague impressions.
Your athlete takes their Clinic Pack home and continues with four live 1-hour online coaching sessions over the following four weekends. Coaches review the movements, give individual feedback, and help your athlete apply them to hitting in the air. Your athlete also gets 2 months of free access to the PC360 Skool training platform.

Have a question not listed above? We're happy to help.

Research & Sources +
  1. Frisch KE, Clark J, Hanson C, et al. (2017). High prevalence of nontraumatic shoulder pain in a regional sample of female high school volleyball athletes. Orthopaedic Journal of Sports Medicine, 5(6). doi:10.1177/2325967117712236
  2. Forthomme B, Wieczorek V, Frisch A, Crielaard JM, Croisier JL. (2013). Shoulder pain among high-level volleyball players and preseason features. Medicine & Science in Sports & Exercise, 45(10), 1852-1860. PMID 23575514
  3. Fayão JG, Rossi DM, Oliveira AS. (2024). Risk and protective factors for shoulder complaints in indoor volleyball players: a comprehensive systematic review. Physical Therapy in Sport, 65, 145-153. PMID 38183823
  4. Gupta D, Donnelly CJ, Jensen JL, Reinbolt JA. (2021). Goal-oriented optimization of dynamic simulations to find a balance between performance enhancement and injury prevention during volleyball spiking. Life, 11(7), 598. PMID 34206587
  5. Boden BP, Dean GS, Feagin JA, Garrett WE. (2000). Mechanisms of anterior cruciate ligament injury. Orthopedics, 23(6), 573-578. PMID 10875418
  6. Visnes H, Bahr R. (2013). Training volume and body composition as risk factors for developing jumper's knee among young elite volleyball players. Scandinavian Journal of Medicine & Science in Sports, 23(5), 607-613. PMID 22260424
  7. Visnes H, Bache-Mathiesen LK, Yamaguchi T, et al. (2024). Long-term prognosis of patellar tendinopathy (jumper's knee) in young, elite volleyball players: tendon changes 11 years after baseline. American Journal of Sports Medicine, 52(13), 3314-3323. PMID 39439271
  8. Mizoguchi Y, Suzuki K, Shimada N, Naka H, Hall T, Akasaka K. (2024). Prevalence and associated factors of non-traumatic knee pain in high school volleyball players: a cross-sectional study. The Physician and Sportsmedicine, 52(6), 614-620. PMID 38669135
  9. Parsons JL, Alexander MJ. (2012). Modifying spike jump landing biomechanics in female adolescent volleyball athletes using video and verbal feedback. Journal of Strength and Conditioning Research, 26(4), 1076-1084. PMID 22446676

PC360 clinics are coaching programs, not medical treatment. Athletes under a provider's care should check with that provider before attending.