Relentless Athletics

Relentless Athletics Relentless Athletics specializes in female athlete development. We provide personal coaching to each athlete within a semi-private environment.

SPECIFIC training for the FEMALE athlete: strength, conditioning, speed & agility, sports nutrition.

Between school, a bus ride and a 6pm game, there is almost never a kitchen. The best snack is the one she actually has w...
09/16/2026

Between school, a bus ride and a 6pm game, there is almost never a kitchen. The best snack is the one she actually has with her.

What should live in her bag all fall: a filled water bottle, trail mix or nuts, fruit that travels, and a granola bar with a chocolate milk for the ride home.

Restock it Sunday and the decision is already made for her on Wednesday at 6pm.

Packing for a long day is a skill, and it's one of the first things we work on in Sports Nutrition Coaching — real food, simple habits, built around her sport and her season so she isn't guessing on the days that matter. In person or online, and parents are part of it.

Book a Discovery Call at relentlessathleticsllc.com

09/15/2026

Week 1 with the 🐍💪

We start with deceleration — how they stop and how they land 🦿 Plyo jumps and depth drops first. Then hang cleans for explosiveness and loaded deceleration 🏋️‍♀️ Finished with trap bar deadlifts plus core and pulling work.

Baseline vertical jumps went in the books tonight 📈 In 12 weeks these girls get to see exactly how far they've come.

Deceleration first. Power comes next 🔥

Every pitching parent hears “she needs to throw more.” The research says something different: velocity traces back to th...
09/14/2026

Every pitching parent hears “she needs to throw more.” The research says something different: velocity traces back to the hips, the trunk and the drive leg — the arm just delivers what they produce. That is why we train pitchers on one leg, in rotation, and through the hips. We are covering all of it on Sunday October 11 (two sessions, 10–11 AM or 11 AM–12 PM) with at Relentless Athletics in Hatfield. Booking link is in 's bio.

Thank you for taking the time to leave us a review. We appreciate you all more than you know.If your daughter is ready t...
09/13/2026

Thank you for taking the time to leave us a review. We appreciate you all more than you know.

If your daughter is ready to get stronger, faster and more confident, her Movement Assessment is step one: relentlessathleticsllc.com

Committed. 🎉Congratulations to Bella Kreyenhagen on her verbal commitment to Thomas Jefferson University softball!When B...
09/12/2026

Committed. 🎉

Congratulations to Bella Kreyenhagen on her verbal commitment to Thomas Jefferson University softball!

When Bella sat down for her assessment here, the first goal she wrote down was simple: play in college. Everything after that was work — lower body strength, speed, and the endurance to hold her power deep into a game in the circle.

That work just turned into a commitment. 🐏

So proud of you, Bella. Congratulations to your family and to your 18U – Rios team. Go be relentless.

Hatfield, PA 📍 link in bio

The first thing that comes off the fall calendar is strength training. It should be the last thing.Here's the part most ...
09/11/2026

The first thing that comes off the fall calendar is strength training. It should be the last thing.

Here's the part most families don't know: she doesn't need three days a week to hold what she built this summer. A review of the research on maintaining performance found strength and muscle size can be held for up to 32 weeks on as little as one session per week — as long as the load stays heavy (Spiering et al., J Strength Cond Res, 2021). Light "maintenance" work is not the same thing. Intensity is what holds the line.

Stop completely and the slide starts fast. In young athletes, four weeks with no training already pulled strength and power off their peak (Chaouachi et al., JSCR 2019). They stay above where they started — but the season is exactly when she needs the peak, not the fade.

And the durability piece: across 25 trials and 26,610 athletes, strength training cut sports injuries to less than a third, and nearly halved overuse injuries. Stretching alone showed no effect (Lauersen et al., Br J Sports Med, 2014).

So when practice goes to six days a week, don't delete the hour — move it. Same day, every week, after her lightest game day. One hour is not another thing on your plate. It's the thing that protects everything else on it.

Girls in a fall season: what day is her hour?

09/10/2026

Get to know the women coaching your daughter. 🏊♀️⚡

Coach Brielle swam in college at Southwestern University. 🏊♀️

She went on to earn her Master's at Midwestern State. 🎓

As our Director of Operations, she's behind nearly everything that runs here. ⚙️💼

Why Relentless? 💙

She came for the mission: empower and motivate young women. 🔥

Her goal is pushing athletes past the limits they thought they had. 🏋️♀️

Her favorite part: watching this facility and community grow. 📈

From a coaching team of 3 to now 6 strong leaders on our floor. 👥✨

And a door that keeps bringing in strong-minded girls ready to grow. 🙌

The limits your daughter thinks she has are negotiable. ⚡

Brielle's whole job is proving it. 💙💫

Committed. Congratulations to Gianna Santangelo on her verbal commitment to Thomas Jefferson University, where she'll co...
09/09/2026

Committed. Congratulations to Gianna Santangelo on her verbal commitment to Thomas Jefferson University, where she'll continue her academic and softball career.

Gianna has put in the work here at Relentless — session after session, in the weight room, when nobody was watching. This is what that work turns into.

So proud of you, Gianna. Go be relentless.

09/08/2026

We are teaming up with for a morning built for pitchers and their parents. Strength, fueling and vertical jump testing — Sunday October 11 — two sessions, 10–11 AM or 11 AM–12 PM, at Relentless Athletics in Hatfield. Bring your pitcher. Book a spot at diamondsinthecircle.as.me (link in 's bio).

Coaches — Fall/Winter team training is being finalized now. 🍁❄️Relentless Team Training is built specifically for entire...
09/07/2026

Coaches — Fall/Winter team training is being finalized now. 🍁❄️

Relentless Team Training is built specifically for entire teams of female athletes: strength, speed, power, and movement quality, programmed around your sport, your season, and your competitive calendar. Not a generic team lift.

What That Looks Like:
🏋️‍♀️ 1–2 Coached Sessions Per Week: Flexible around your practice schedule.

🎯 Tailored Programming: Built for your specific sport, season, and training age.

⚡ Mechanics Coached, Not Assumed: Dedicated instruction on sprinting, jumping, landing, and change-of-direction.

📈 Progressive Loading: Keeps athletes healthy, resilient, and performing at their peak all season.

💳 Flexible Billing: Billed directly to the organization or through individual athlete enrollment—your call.

📅 Zero Administrative Stress: We handle scheduling and parent communication entirely.

The takeaway for coaches: Strength work done alongside your season should support practice, not compete with it. That only happens when the program is built around your calendar—which is exactly how we do it.

🔥 Slots are being finalized now. Click the link in our bio or visit relentlessathleticsllc.com/team-training to schedule a discovery call today!

Address

Philadelphia, PA

Telephone

+12159189748

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