Kettle Bell Certified Instructor at Define Defense
This past Sunday, I got my Kettle Bell instructor certification training by the USAKL. It was one of the things that I’ve been wanting to do for a while and get better at. As a trainer, I was able to do many things with kettle bells but the advanced technical moves were not part of my skill set yet. The reason for this was that when I went to college for Phys Ed, Sports Management and Personal Training, kettle bells weren’t really used in Belgium.
Another reason was that I was shown incorrect form on many occasions. When I went to some other gyms or worked with other trainers, I was shown certain methods to do the clean, jerk and snatch. On all of these occasions, I left with lower back pain and extreme muscle soreness.
At the instructor certification course however, I learned PROPER technique and how to perform the clean & jerk and snatch in a correct way that will increase your skills, endurance, mobility, body awareness etc. I must have done 800 scoop swings yesterday (yes with low weights but still many reps) and there is no sign of any back pain or other muscle soreness.
I was very impressed with the course and am very proud to be a certified kettle bell instructor that can demonstrate correct form in a responsible way. There is of course a long way to go and much to learn but learning these technically advanced moves was a huge step in mastering the idea behind kettle bells, therefore being able to teach safe and performance enhancing kettle bell classes!
Soon, Define Defense will start kettle bell classes, combined with cross training by using all our other cutting edge equipment in our facility. Come check them out and join a class for free. Kettle bell exercises are great to get in shape, strengthen or tone your body and improve your performance. As I experienced, I guarantee you it’s a fantastic workout like you’ve never done before!


By Sander Vanacker, owner, head instructor and personal trainer .
Define Defense in Boulder, CO
- Mixed Martial Arts
- Brazilian Jiu Jitsu
- Self Defense Classes & Workshops
- Personal Training
- TRX / Cross Training Classes
- Kettle Bell
1805 11th Street Suite B
Boulder, CO 80302
(720) 340 6254
Info@DefineDefense.com
Next Self Defense Course Dates
Define Defense now offers 4 week self defense courses on Fridays from 5-6pm. In these 4 classes, we go over:
- Self defense on the floor against a standing attacker
- Self defense against sexual assault
- Self defense against grabs, chokes and other forceful attacks
- Effective striking
- How to avoid dangerous situations
- How to maximize your chances of escape
- How to use pepper sprays (and other defense sprays)
- Vital points, body language and other proven methods to get yourself into safety
The next self defense course will take place on these dates:
October 26th
November 2nd
November 9th
November 16th
Every attendee will receive an information packet. If you cannot attend all 4 consecutive classes, you can use your remaining class(es) during the next course dates.
The price for the full program is only $75.
If you want to reserve a spot, please send us a message or register here. Spots are limited!
This program combines all of the most effective and realistic ways to defend yourself against any dangers that may occur. We focus on prevention as well as protecting yourself and others. In this course, you will learn how to deal with a crisis situation, mentally as well as physically. Everything we teach is relevant to real situations and applies more realistic training methods for improved results.

Daily Camera Workout of the Week: Cross Training with a TRX Boost
Danielle Mulein For the Camera
Posted: 05/15/2012 08:21:30 AM MDT
Updated: 05/15/2012 08:26:29 AM MDT
Define Defense, 1805 11th St., Suite B, Boulder, 720-340-6254, definedefense.com
Instructor: Belgium born Sander Vanacker, co-owner and head instructor of Define Defenses, a martial arts and personal training gym, has a passion for fitness. Vanacker has been a martial arts devotee since childhood with extensive training in Wado Ryu Karate and Japanese Ju Jutsu.
Vanacker dabbled in semi-professional cycling in Belgium, triathlons, weight lifting and general fitness training, while getting a bachelor's degree in physical education, personal training and sports management.
Matt Iwaskow (right) and Hawk Vanek (left) workout at Define Defense in Boulder. ( MARK LEFFINGWELL )
Two months ago, Vanacker got TRX suspension band certified. The weight-free exercises allow for more control over workout intensity, he says. He began incorporating TRX into a cross training fitness class.
What is the workout?
The class is a combination of cross training and TRX exercises designed for a full body workout. Utilizing the entire space, Vanaker designs a circuit workout that keeps the entire class energized and alert while working on core, endurance, strength and cardio.
The workout started with running and then made its way through kettle bell lifts, undulation ropes, squats, crunches, TRX suspension bands, and a vibration plate -- just to name few. With music pumping in the background and calls of encouragement or instruction from Vanaker, the class was upbeat and extremely dynamic.
What's different?
The class is a mix of cross training and TRX band exercises enabling a very well-rounded workout. Although the class is challenging, it allows for individual pacing and modification.
"Sander is exceptionally good at being able to modify for injury or specific need," said Aaron Hamilton, a loyal client who has struggled with a shoulder injury for years.
Equipment used:
Vanacker's combination of traditional weights and medicine balls with undulation ropes and a vibration plate is key in keeping the class exciting. I had never used a vibration plate, TRX bands or undulation ropes, but Vanacker was a supportive and knowledgeable teacher who focused on explaining proper technique.
Cost:
The first class is free. Define Defense also has month-based memberships ranging from $85 to $110 for unlimited classes or punch cards, 10 classes for $200 and 20 classes for $350.
Level:
Although this class is not for the weak and weary, you work at your own level. A typical active person could step into the class, never having even seen or heard of circuit training or TRX bands, and be able to keep up.
What to prepare:
Workout clothes you can easily move in are a must, along with some water, although there is a drinking fountain. The class is taken barefoot on the martial arts mats, so workout shoes are unnecessary.
Muscles worked:
It truly is an all-encompassing workout targeting core and oblique muscles, shoulder and arm conditioning, glutes, inner thigh, calf and quad strengthening. It is a highly cardiovascular class that focuses not only on strength improvement but overall health and wellness.
What I loved:
I actually loved the whole class. I have never done anything remotely like cross training or TRX and I was pleasantly surprised. The TRX, though, probably was my favorite, because it's all based on your own strength and bodyweight. Oh and they validate parking, always a plus in downtown Boulder.
What I didn't like:
I didn't care for the shoe-free workout. We were on mats, which was fine, but sweat made my feet slippery and caused difficulty gripping the mat, which caused my balance to be off during some exercises.
How I felt after the class:
Sore, I am not going to sugar coat it. I left the class pumped up on endorphins and loving life, but woke up the next morning with a nice variety of soreness, including my shoulders, arms and upper back, as well as well as my oblique and calf muscles.
-- Reported by Danielle Mulein
Review: TRX Suspension Bands
TRX has become very popular during the last few years. All our clients use it and many other people have used it or at least seen it before. TRX makes Suspension Bands and Rip Trainers (which are also coming to our studio soon).
Define Defense has been using TRX Suspension Bands since its opening weekend. We absolutely love using them for many different reasons. Because they are so great, our head instructor Sander completed the official TRX Suspension Bands certification course.
The background of it is pretty cool as well. The founder was a Navy Seal Team leader and made the Suspension Band when they were on missions and in safe houses. Since there is not much room in these places, they needed a way to stay in shape and work out their bodies. That is how the Suspension Band was created.
Now, years later, it has become one of the best pieces of equipment that I have ever used. My personal biggest reason of this is because you can work so many different muscle groups in ways that are hard to replicate. You utilize your body in such a way that many parts of it are working at the same time, therefore it is extremely functional. Although I do have huge reservations about ‘functional fitness’, the TRX band is the best example of how to do it right. More about my take on functional fitness another time, just realize that TRX bands do work the entire body in every plane of motion. Therefore, TRX training is very practical to strengthen your body for everyday use and activities. It is also perfect to avoid injuries, coordination and body awareness (something that is very important for everyone and especially elderly people).
A great aspect of them for myself is that you can choose any intensity you want. There are many adjustments you can do to change the difficulty and resistance of the exercise. There is no doubt that you can do an extremely hard workout with the TRX Suspension Bands. That is why it’s a perfect workout tool for any athlete because you can train for performance with them. Of course, variation is key and I am a huge believer of using many different pieces of equipment, exercises etcetera but you can absolutely get a very intense workout with simply the TRX Suspension Band.
Many of our clients train for self defense, MMA, Brazilian Jiu Jitsu and more. All of them are able to use the TRX bands very effectively. It strengthens them, makes them react quicker, makes them less prone to injuries, creates better body awareness and core stability etcetera.
Define Defense offers 7 TRX / Cross Training classes every week and utilizes all our equipment during our martial arts classes as well to provide our clients with a great workout as well as learning effective skills for self defense, MMA, BJJ etc.
By Sander Vanacker, owner, head instructor and personal trainer of Define Defense Martial Arts & Personal Training.
Define Defense in Boulder, CO
- Modern Martial Arts
- Brazilian Jiu Jitsu & MMA
- Self Defense Classes & Workshops
- Personal Training
- Cross Training / TRX Classes
1805 11th Street Suite B
Boulder, CO 80302
(720) 340 6254
Info@DefineDefense.com
Strength & Conditioning for BJJ
The most important thing in BJJ is time spent drilling and sparring. However, if you are planning on competing there are several other factors that matter. Two of the most important factors are strength and conditioning. Are you strong enough to get out of a heavier opponents mount? Do your arms give out when trying to do guillotines? What about your lungs? All of these issues can be addressed when you enroll in a strength and conditioning program.
In combat sports, you are usually matched with an opponent of equal weight and often, as the case with Brazilian Jiujitsu, equal skill or belt rank. Since this is true, it is a good idea to have every advantage over your opponent possible. If your technical ability and size are the same, then the opponent who did more and trained harder will usually win.
The great thing about our strength and conditioning classes is the variety of equipment. For example, when training with TRX bands you can make it as hard or easy as you want. You do this usually by moving closer or farther away from the anchor point. This saves a lot of time usually spent changing weights. Another great thing is the negative resistance training. Negative resistance concentrates on the lowering phase of the exercise. For example, when bench pressing, you would lower the weight very slowly then have assistance pushing it up. This type of training lends itself to great strength gains. It also focuses on stabilization muscles which greatly help your overall strength.
Your overall jujitsu game is by far the most important piece of the puzzle. The more you drill and train, the better you will be. However, if you are matched with an equally skilled and sized opponent, it is usually the stronger more conditioned athlete that wins. Make sure you are doing more than your opponents in all areas of your training. More drills, more rolling, more strength training and more cardio. This is the only way to ensure victory.
By Drew Ash, head Brazilian Jiu Jitsu instructor at Define Defense in Boulder, Colorado
Define Defense in Boulder, CO
- Modern Martial Arts
- Brazilian Jiu Jitsu & MMA
- Self Defense Classes & Workshops
- Personal Training
- Cross Training / TRX Classes
1805 11th Street Suite B
Boulder, CO 80302
(720) 340 6254
Info@DefineDefense.com
TRX Group Classes
Monday:
6.15-7.15pm: Cross Training / TRX Group Class
Tuesday:
1-2pm: Cross Training / TRX Group Class
Wednesday:
11-12pm: Cross Training / TRX Group Class
5.15-6.15: Cross Training / TRX Group Class
Thursday:
5.15-6.15pm: Cross Training / TRX Group Class
Friday:
11-12pm: Cross Training / TRX Group Class
Saturday:
1-2pm: Cross Training / TRX Group Class
TRX ab exercise
Define Defense in Boulder, CO
- Modern Martial Arts
- Brazilian Jiu Jitsu & MMA
- Self Defense Classes & Workshops
- Personal Training
- Cross Training / TRX Classes
1805 11th Street Suite B
Boulder, CO 80302
About Self Defense Classes & Workshops - Crime, Reports and Bad Decisions
I'm sure you've heard or read about the 20 year old CU student who got ticketed for falsely reporting an attack on University Hill. You can read more about it here.
Her initial story was that she was walking alone when she was grabbed by a 200lbs. knife wielding man. After a struggle, she got away with some minor scratches.
Doesn't add up does it? It may be possible if she was very lucky and the attacker only had the intention to scare her with the knife but did not plan on actually using it. It is definitely possible if she acted and overwhelmed her attacker (you want to take away the attacker's confidence, therefore the Golden Rule of self defense: ACT CRAZY). However, if a 200 lbs. man was wielding with a knife, it would be extremely hard to walk away the way she did. Not just for her but for anyone, including me!
False reports are unfortunate and prevent law enforcement from investigating real crimes. For example:
The armed robbery which turned fatal for Todd Walker (March 2011)
The gunmen who robbed multiple people and sexually assaulted a woman (August, 2011)
A gunman outside the Boulder Community Hospital (April, 2011)
Bank robbery in North Boulder (September, 2011)
CU campus robbery (January, 2012)
Sexual assault attempts (October, 2011)
Does this mean Boulder is an unsafe or bad place to live? Absolutely not! However, as in every big town (and college town), you need to be aware and more importantly, not be naive. Not everyone is trustworthy, you need to be cautious and use common sense.
After all, things happen and you don't control everything or everyone. None of the above victims ever thought this would happen to them but unfortunately it did. We should all try to keep ourselves and others safe. There are many ways to do this but the first step is to realize bad things do happen. Being prepared doesn't hurt. The last thing you want to do is putting yourself in a situation in which bad things can happen.
As a self defense instructor, I spend a lot of attention to all aspects of self defense. It is not simply about the techniques and how to get back to safety but it's also about preventing, scanning, communication (verbal and non verbal), knowing vital points and very important: your mental state.
My wife pointed out an article about self defense a few weeks ago and Linda Fairstein (a former sex crimes prosecutor) addresses a few very bad choices that turned for the worst.
- Kenia Monge from Denver was planning on going to college to become a crime scene investigator so she was an intelligent woman. When she left her friends to go to the restroom when partying, she never came back. Travis Forbes was found guilty for the murder of Kenia. She made one mistake but it cost her and her family dearly. It is very important to use a buddy system when leaving the group, no matter how close or easy your destination is.
- Holly Bobo, a 20 year old student was kidnapped outside her Tennessee home. It seems like Holly did not resist enough, at least not in the initial part of her kidnapping. Traces of resistance were found but it was probably too late. If you feel unsafe, draw attention to yourself. It will lower your attacker's confidence and other people may be able to assist or call 911. Do whatever you can to draw attention and target vital points to maximize damage and pain. Please note that every situation is different and everyone's response is different. When there are weapons involved, it is also a very different scenario so this response may not fit all situations!
- Paula Sladewski had a fight with her boyfriend in a club, it came to a point that her boyfriend was thrown out and she stayed. When she left later, cameras show a man was following her. She didn't make it and up to this day, there is no suspect. Paula made the mistake of making a decision based on her emotions at that time. This affected her safety and it turned for the worst. Always be careful and don't take risks, even if you are upset.
The article focussed on these three situations that were caused by a certain decision. Other people doing the same actions may be fine and many other decisions will also turn out to be the wrong one. Should you lock yourself up and don’t take any risks? No but take calculated risks and please use common sense. It’s better to be safe than sorry. In my mind, every person should take a proper self defense course and know the basics (not because we teach these but I believe things can happen and you should be able to help yourself if needed).
We teach self defense classes 4 times a week and offer punch cards to give our clients the freedom to choose their own times. We focus on every aspect of self defense and make sure you leave with a strong basic knowledge and skill set. All levels and ages are welcome. More info about our self defense classes and workshops here.
By Sander Vanacker, Define Defense’s certified personal trainer and head martial arts instructor, based in Boulder, Colorado. Take a look at www.DefineDefense.com, www.TrainerVanacker.com or check out our videos on YouTube.com/DefineDefense ! Define Defense in Boulder, CO
- Modern Martial Arts
- Brazilian Jiu Jitsu & MMA
- Self Defense Classes & Workshops
- Personal Training
- Cross Training / TRX Classes
1805 11th Street Suite B
Boulder, CO 80302
Red Man Self Defense Training - Advanced Students
Define Defense in Boulder, CO
- Modern Martial Arts
- Brazilian Jiu Jitsu & MMA
- Self Defense Classes & Workshops
- Personal Training
- Cross Training / TRX Classes
1805 11th Street Suite B
Boulder, CO 80302
Self Defense for Travelers
http://www.longjourneyhome.net/
Will you be traveling or do you know someone who will? Then come by for a self defense crash course! You never know what may happen and it’s better to be safe than sorry.
Define Defense in Boulder, CO
- Modern Martial Arts
- Brazilian Jiu Jitsu & MMA
- Self Defense Classes & Workshops
- Personal Training
- Cross Training / TRX Classes
1805 11th Street Suite B
Boulder, CO 80302
Happy Thanksgiving! Black Friday and class times.
We will be open on:
Friday 5-7.30pm
Saturday 10.30am-12pm
Saturday 1-3.30pm
Take advantage of these deal to get yourself more protective gear, merchandise etc!
Also, our advanced online system enables you to purchase gift cards! These are a great holiday present for anyone looking for high quality products or someone who wants to get started on their New Year's resolutions (self defense classes, getting in shape)!
If you are shopping online, use the code 25FS for your 25% off!
http://clients.mindbodyonline.com/ws.asp?studioid=14713&stype=43
Self Defense Workshops, Courses For Friends, Companies etc.
- Self Defense parties for friends or families (1 hour, 2 hours or more)
- Specific one time or recurring workshops for companies
- Seminars on weapons defense, submission wrestling, MMA, conditioning, physical fitness etc.
- Team building workshops
- Outdoor bootcamp classes or workshops (starting early 2012)
If you have anything else in mind, we can also tailor something to meet your needs! For more information or scheduling, contact us at info@DefineDefense.com

MMA & BJJ Instructor Conor "Hurricane" Heun
Define Defense is proud to announce that Conor “Hurricane” Heun is our new Mixed Martial Arts & Brazilian Jiu Jitsu instructor. Conor is teaching the following Friday nights and will be teaching 2-4 times every week starting the end of February. The other MMA classes will be taught by instructor Sander Vanacker. NOTE: All MMA & BJJ classes will be 1.5 hour long!
Conor is a highly skilled and experienced professional MMA fighter who fought under the Strikeforce banner and who also has a brown belt in 10th Planet Jiu Jitsu under Eddie Bravo. He is known for his will power and mental strength as well as his work ethic and technique.
Our 1.5 hour classes will be a blend of MMA and MMA specific Brazilian Jiu Jitsu. As for now, Conor is teaching MMA skills step by step, therefore since a fight starts standing, we cover the standing skills first. In March, we will go over grappling from the bottom, followed by dominant top position etc.
Come train at Define Defense with our instructors Conor Heun and Sander Vanacker now! This month, we give FREE strength & conditioning classes along with our MMA memberships (12mo: $125, 6mo: $140, 3mo: $160), which gives you unlimited access to our 15 classes/week in TRX, Kettle Bell and Warrior Training.
Here is more info on Conor Heun:
PROFESSIONAL RECORD
9 - 5 - 0 (Win - Loss - Draw)
WINS
1 (T)KOs ( 12.5 %)
5 Submissions ( 62.5 %)
2 Decisions ( 25 %)
Follow on:
www.ConorHeun.com
www.Facebook.com/Conor.Heun
Twitter.com/ConorHeun

Unsatisfied and unwilling to give up on his goal of becoming champion, Conor enrolled at Div. III wrestling powerhouse, Ithaca College. Following a redshirt year on the sidelines, Heun notched 20 wins and qualified for the NCAA tournament. He failed to place. Faced with injuries and rising academic pressure, Heun would never again see the NCAA tournament.

After graduating with a BA in English Literature, Conor moved back to Boulder where he opened a silk screening business and became an assistant wrestling coach. Feeling like he was destined for bigger things, Conor moved to southern California where he took a job selling dental equipment. Looking for a way to stay fit, Conor began training at Eddie Bravo's 10th Planet Jiu Jitsu Academy. Encouraged by training partners Jason Chambers and Amir Rahnavardi, Conor stepped into the cage for the first time on May 12, 2006 winning his pro debut by rear naked choke.
Conor soon began training full time under the tutelage of Chris Reilly and Eddie Bravo at Legends MMA. His exciting and aggressive style soon caught the eye of Bas Rutten who recruited Conor to fight for the Los Angeles Anacondas in the International Fight League. After fighting in the IFL for one season, he moved on to fight for Elite XC and now is under contract with Strikeforce. Always one to bring the fight to his opponents, his never boring style continues to make him a star to watch as he battles for the belt.
Kettle Bell Class Pictures
Here are some new pictures of our kettle bell classes last week:




Holiday Deals
Holidays are coming and Define Defense is in the holiday spirit! We are offering our new clients our best deals to date! We offer high quality training in:
- Mixed Martial Arts
- Brazilian Jiu Jitsu
- Self Defense Classes & Workshops
- TRX & Cross Training Classes
- Kettle Bell Classes
- Personal Training
From now until January 1st 2013, we offer the following deals:
Mixed Martial Arts:
20% off memberships and punch cards
+ a free T shirt or tank top
Self Defense:
Four self defense classes, a Mace 10% Pepper Gel and a Define Defense T shirt or tank top for only $99
TRX / Cross Training:
20% off memberships and punch cards
+ a free T shirt or tank top
Kettle Bell Program:
20% off memberships and punch cards
+ a free T shirt or tank top
Personal Training:
First session is free!
Youth Martial Arts:
20% off memberships and punch cards
+ a free Gi

Next Self Defense Course in January 2013
Define Defense offers 4 week self defense courses on Fridays from 5-6pm. In these 4 classes, we go over:
- Self defense on the floor against a standing attacker
- Self defense against sexual assault
- Self defense against grabs, chokes and other forceful attacks
- Effective striking
- How to avoid dangerous situations
- How to maximize your chances of escape
- How to use pepper sprays (and other defense sprays)
- Vital points, body language and other proven methods to get yourself into safety
The next self defense course will take place on these dates:
January 11th
January 18th
January 25th
February 1st
Every attendee will receive an information packet. If you cannot attend all 4 consecutive classes, you can use your remaining class(es) during the next course dates.
You can also gift this course to a loved friend or family member!
The price for the full program is only $75.
If you want to reserve a spot, please send us a message at info@definedefense.com or register here (under Self Defense Class):
http://clients.mindbodyonline.com/ws.asp?studioid=14713&stype=41
Spots are limited!
This program combines all of the most effective and realistic ways to defend yourself against any dangers that may occur. We focus on prevention as well as protecting yourself and others. In this course, you will learn how to deal with a crisis situation, mentally as well as physically. Everything we teach is relevant to real situations and applies more realistic training methods for improved results.
Our central Boulder address:
1805 11th Street Suite B
Boulder, CO 80302
(720) 340 6254
Info@DefineDefense.com






