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HardWorx Fitness 4th St.

4.7 ★★★★★ 80 Google reviews · Kickboxing gym in Long Beach, California

Free trial Beginners welcome Kids & teens Cardio kickboxing Private lessons Affiliated

Affiliated gym — reviews and the gym's own info suggest it belongs to a known kickboxing or boxing-fitness franchise or network (think 9Round, iLoveKickboxing, CKO, TITLE Boxing Club or Jabz). Franchise gyms run a consistent class format and are often a friendly, familiar place to start. If a specific brand matters to you, confirm it on the gym's own site.

World-class hybrid training facility offering mixed martial arts instruction.

Plan your first class

  • Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
  • Beginner-friendly all fitness levels welcome, including total beginners — no experience needed, and you get in shape by training, not before
  • Cardio kickboxing classes high-energy cardio kickboxing on the bags and pads — a fun, sweaty workout built for fitness and weight loss, at your own pace
  • Kids & teen classes kids and teen kickboxing classes — built around confidence, focus, and fun
  • Private lessons one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
  • Sparring sparring and partner work for members who want it — always optional, eased in gradually, with the coach controlling the contact
  • Today see hours ·
  • Website & schedule hardworxfitness.com — book classes and see the live schedule
  • Phone +1 562-436-2649

Hours

Monday 6 am–9 pm
Tuesday 6 am–9 pm
Wednesday 6 am–9 pm
Thursday 6 am–9 pm
Friday 8 am–8 pm
Saturday 8 am–4 pm
Sunday 8 am–2 pm

Hours shift for holidays and class-schedule changes — worth a quick check before a special trip.

The classes they run

Kickboxing classes on the schedule at HardWorx Fitness 4th St., confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🧒 Kids Kickboxing 14 mentions

“My son recently started at Long Beach United Boxing, and I’m so pleased with this AMAZING PROGRAM.”

All gyms that run kids kickboxing →

🌱 Beginners 3 mentions

“Everyone is so friendly, you’ll feel right at home whether you’re experienced or brand new.”

All gyms that run beginners →

🦵 Muay Thai

“I took a Muay Thai class this evening and I’m hooked!”

All gyms that run muay thai →

🥊 Boxing 14 mentions

“I'd never taken any boxing classes before, and I was worried I wouldn't be able to keep up, but the trainers here helped me throughout the classes.”

All gyms that run boxing →

🔥 Cardio Kickboxing

“Kickboxing class was amazing cardio with great techniques on how to transfer energy into kicks and punches.”

All gyms that run cardio kickboxing →

Other martial arts here

Kickboxing gyms are usually multi-discipline. Here's what else members mention training under the same roof at HardWorx Fitness 4th St. — mined from their reviews and the gym's own info.

🦵 Muay Thai

“I took a Muay Thai class this evening and I’m hooked!”

Other gyms that also teach muay thai →

🥊 Boxing 14 mentions

“I'd never taken any boxing classes before, and I was worried I wouldn't be able to keep up, but the trainers here helped me throughout the classes.”

Other gyms that also teach boxing →

🏟️ MMA 2 mentions

“I read the reviews for this Boxing/MMA gym and that’s what encouraged me to go.”

Other gyms that also teach mma →

🛡️ Self-Defense

“It can also teach you self-defense.”

Other gyms that also teach self-defense →

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want muay thai, boxing, or MMA alongside your kickboxing, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 80 Google reviews — in their own words.

🧑‍🏫 expert, motivating coaching 2 mentions
🌱 welcoming to beginners 5 mentions

“After my first class i felt drained, happy , thirsty and hungry :D .”

🎉 fun, high-energy classes 3 mentions

“I recommended it to a friend, and now she’s hooked, too!”

💦 killer cardio workout 3 mentions

“I just received another compliment about what great shape I’m in, so I thought I should give proper credit to LB United.”

🧼 clean, well-equipped gym 6 mentions

“The teachers are amazing, the facility is clean, and the schedule is ideal!”

💵 good value / fair pricing 3 mentions

“The year-long membership I got was also a great deal.”

From the reviews

I think this is an absolute wonderful gym. It really has an old school boxing feel to it. My sons attended the boxing classes and I enjoyed the training they received. Coach Frank and coach Shawn saw that every child got the proper training. There is regular breaks and no child is being pushed over their limits.

★★★★★ — Yonic, Aug 2021

I just received another compliment about what great shape I’m in, so I thought I should give proper credit to LB United. Today I did the 7 am boxing class with Joseph, and the hour flew by before I realized how hard he worked us.

★★★★★ — Teresa, Jul 2019

Love this gym! Great classes in many different disciplines. Everyone is so friendly, you’ll feel right at home whether you’re experienced or brand new.

★★★★★ — Derek, Oct 2023

I read the reviews for this Boxing/MMA gym and that’s what encouraged me to go. I’d always wanted to take up boxing but was hesitant since not many women do it and these gyms are filled with guys so I always felt weird walking in. I took a Muay Thai class this evening and I’m hooked!!

★★★★★ — Rebecca, Oct 2019

Excerpts from public Google reviews. Read all 80 reviews →

New to kickboxing? Start at HardWorx Fitness 4th St.

HardWorx Fitness 4th St. comes up as a beginner-friendly gym, going by their listing and members’ reviews. If you've never thrown a punch or a kick, that's exactly who a good beginners class is for. A few things worth knowing before your first week. First, you don't need to be fit or coordinated to start — you get in shape by training, not before it, and coaches scale every drill to you. Second, you won't be thrown into hard sparring — reputable gyms build the basics (stance, footwork, and punches and kicks on pads and bags) first, and any contact eases in gradually under a coach's control. Third, all fitness levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most gyms are happy to let you watch or try a class first, so reach out before you commit.

Check beginner classes on their site

Your first kickboxing class at HardWorx Fitness 4th St.

Nervous about walking into a kickboxing gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling the basics — stance, footwork, and punches and kicks on pads or a heavy bag — not hard sparring. Go at your own pace and rest whenever you need to; no one will bat an eye. What to wear: comfortable athletic clothes you can move and sweat in, and supportive trainers. What to bring: water, and hand wraps and gloves if you have them — many gyms lend loaner gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves and wraps (and shin guards once you start sparring). Sparring is optional and eases in gradually, once your basics are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.

Kickboxing is a contact sport. Warm up, pace yourself, listen to your coaches, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find HardWorx Fitness 4th St.

1936 E 4th St, Long Beach, CA90802

Get directions Instagram · Facebook

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this gym? Claim your listing — it's free.